Powerplant Study Guide
Thrust reversers utilizing a pneumatic actuating system usually receive operating pressure from...
the engine bleed air system
A manifold pressure gauge is designed to...
Indicate absolute pressure in the intake manifold
The horsepower developed in the cylinders of a reciprocating engine is known as the...
Indicated horsepower
The horsepower developed in the cylinders of a reciprocating engine is known as..
Indicated horsepower
Aircraft that operate more than one generator connected to a common electrical system must be provided with...
Individual generator switches that can be operated from the cockpit during flight
The type of oil pumps most commonly used on turbine engines are classified as...
Positive displacement
A rotary-vane pump is best described as a..
Positive-displacement pump
What is indicated when the front cone bottoms while installing a propeller?
Rear cone should be moved forward
If staggered ignition timing is used, the...
Spark plug nearest the exhaust valve will fire first
The numbers appearing on the ignition distributor block indicate the...
Sparking order of the distributor
What is the final authority for the details of carburetor overhaul?
The manufacturer's recommendations
Most modern airliners that fly in the .8 mach speed range are fitted with...
Turbofan engines
Generally, the practice when trimming an engine is to...
Turn all accessory bleed air off
What part of an aircraft in flight will begin to accumulate ice before any other?
Carburetor
What is the function of a blast tube as found on aircraft engines?
A device to cool an engine accessory
What is the function of a blast tube as used on aircraft reciprocating engines?
A device to cool an engine accessory
A manifold pressure gauge is designated to...
Indicate absolute pressure in the intake manifold
When an electric primer is used, fuel pressure is built up by the...
Booster pump
An indication of unregulated power changes that result in continual drift of manifold pressure indication on a turbosupercharged aircraft engine is known as...
Bootstrapping
An indication of unregulated power changes that result in continuous drift of manifold pressure indication on a turbocharged aircraft engine is known as...
Bootstrapping
In what position should the ignition switch be placed when attempting to use a timing light to time the magneto to the engine?
Both
During operational check of an aircraft using hydromatic full-feathering propellers, the following observations are made: The feather button, after being pushed, remains depressed until the feather cycle is complete, then opens. When unfeathering, it is necessary to manually hold the button down until unfeathering is accomplished.
Both feather cycle and unfeather cycle are functioning properly
1. Accumulation of contaminates in the compressor of a turbojet engine reduces aerodynamic efficiency of the blades 2. Two common methods for removing dirt deposits from turbojet engine compressor blades are a fluid was and an abrasive grit blast Regarding the above statements,
Both number 1 and number 2 are true
1. Airworthiness Directives are Federal Aviation Regulations and must be complied with unless specific exemption is granted 2. Airworthiness Directives of an emergency nature may require immediate compliance upon receipt. Regarding the above statements,
Both number 1 and number 2 are true
1. Airworthiness Directives are Federal Aviation Regulations and must be complied with unless specific exemption is granted. 2. Airworthiness Directives of an emergency nature may require immediate compliance upon receipt. Regarding the above statements,
Both number 1 and number 2 are true
1. Alternators are rated in volt-amps, which is a measure of the apparent power being produced by the generator. 2. Alternating current has the advantage over direct current in that its voltage and current can easily be stepped up or down. Regarding the above statements,
Both number 1 and number 2 are true
1. Cast iron piston rings may be used in chrome-plated cylinders 2. Chrome plated rings may be used in plain steel cylinders Regarding the above statements,
Both number 1 and number 2 are true
1. Cast iron piston rings may be used in chrome-plated cylinders 2. Chrome-plated rings may be used in plain steel cylinders. Regarding the above statements,
Both number 1 and number 2 are true
1. Electrical circuit protection devices are rated based on the amount of current that can be carried without overheating the wiring insulation. 2. A "trip-free" circuit breaker makes it impossible to manually hold the circuit closed when excessive current is flowing. Regarding the above statements,
Both number 1 and number 2 are true
1. Fuel may be used to cool oil in gas turbine engines. 2. Ram air may be used to cool oil in gas turbine engines. Regarding the above statements,
Both number 1 and number 2 are true
1. Generally, when a turbine engine indicates high EGT for a particular EPR (when there is no significant damage), it means that the engine is out of trim. 2. Some turbine-powered aircraft use RPM as the primary indicator of thrust produced, others use EPR as the primary indicator. Regarding the above statements,
Both number 1 and number 2 are true
1. In a turbine engine axial-flow compressor, each consecutive pair of rotor and stator blades constitutes a pressure stage 2. In a turbine engine axial-flow compressor, the number of rows of stages is determined by the amount of air and total pressure rise required. Regarding the above statements,
Both number 1 and number 2 are true
1. Powerplant instrument range markings show whether the current state of powerplant operation is normal, acceptable for a limited time, or unauthorized. 2. Powerplant instrument range markings are based on installed engine operating limits which may not exceed (but are not necessarily equal to) those limits shown on the engine Type Certificate Data Sheet. Regarding the above statements,
Both number 1 and number 2 are true
1. Some aircraft exhaust systems include an augmenter system to draw additional air over the engine for cooling. 2. Augmenter systems are used to create a low pressure area at the lower rear of the aircraft engine cowling. Regarding the above statements,
Both number 1 and number 2 are true
1. Some exhaust systems include an augmenter system to draw additional air over the engine for cooling. 2. Augmenter systems are used to create a low pressure area at the lower rear of the aircraft engine cowling. Regarding the above statements,
Both number 1 and number 2 are true
1. The mixture used at rated power in air cooled reciprocating engines is richer than the mixture used through the normal cruising range. 2. The mixture used at idle in air cooled reciprocating engines is richer than the mixture used at rated power. Regarding the above statements,
Both number 1 and number 2 are true
Oil tank fillers on reciprocating engines are marked with the word...
"Oil" in accordance with 14 CFR part 23
According to Federal Aviation Regulations, oil tank fillers on turbine engines must be marked with the word...
'Oil'
Oil tank filters on reciprocating engines are marked with the word...
'Oil' in accordance with 14 CFR part 23
Determine which portion of the AD is acceptable for Model O-690 series engine, serial No. 5863-40 with 283 hours' time in service. This is the compliance portion of an FAA Airworthiness Directive. Compliance required as indicated: (A) For model o-690 series engines, serial numbers 101-40 through 5264-40 and IO-690 series engines, serial numbers 101-48 through 423-48, compliance with (C) required within 25 hours time in service after the effective date of this AD and every 100 hours' time in service thereafter. (B) For Model O-690 series engines, serial numbers 5265-40 through 6129-40 and IO-690 series engines, serial numbers 424-48 through 551-48, compliance with (C) required as follows: (1) Within 25 hours' time in service after the effective date of this AD and every 100 hours' time in service thereafter for engines with more than 275 hours' time in service on the effective date of this AD. (2) Prior to the accumulation of 300 hours total time in service and every 100 hours' time in service thereafter for engines with 275 hours or less time in service on the effective date of this AD. (C) Inspection the oil pump drive shaft (p/n 67512) on applicable engines in accordance with instructions contained in Connin Service Bulletin No. 295. Any shafts which are found to be damaged should be replaced before further flight. These inspections shall be continued until Connin P/N 67512 (redesigned) or P/N 74641 oil pump drive shaft is installed at which time the inspections may be discontinued.
(B), (1)
If the crankshaft runout readings on the dial indicator are plus .002 inch and minus .003 inch, the runout is...
.005 inch
A Bourdon-tube instrument may be used to indicate 1. Pressure 2. Temperature 3. Position 4. Quantity
1 and 2
A mixture ratio of 11:1 normally refers to...
1 part fuel to 11 parts air
Which statements are true regarding aircraft engine propulsion? 1. An engine driven propeller imparts a relatively small amount of acceleration to a large mass of air 2. Turbojet and turbofan engines impart a relatively large amount of acceleration to a smaller mass of air 3. In modern turboprop engines, nearly 50 percent of the exhaust gas energy is extracted by turbines to drive the propeller and compressor with the rest providing exhaust thrust
1, 2
Operating thrust reversers at low ground speeds can sometimes cause 1. Sand or other foreign object ingestion 2. Hot gas re-ingestion 3. Compressor stalls
1, 2, 3
What indications may shift when a turbofan engine anti-icing (bleed air) system is turned on? 1. Tachometer 2. EGT 3. EPR
1, 2, 3
Which of the following are advantages of dual ignition in aircraft engines? 1. Gives a more complete and quick combustion of the fuel 2. Provides a backup magneto system 3. Increases the output power of the engine 4. Permits the use of lower grade fuels 5. Increases the intensity of the spark at the spark plugs
1, 2, 3
Which of the following is true in reference to a split spool turbofan? 1. The rotors are independent with no physical connection. 2. Many dual rotor systems have rotors turning in the opposite directions. 3. Most large turbofan engines use a large fan with a few stages of compression called the low-pressure spool.
1, 2, 3
Which of these conditions will cause an engine to have an increased tendency to detonate? 1. High manifold pressure 2. High intake air temperature 3. Engine overheated 4. Late ignition timing
1, 2, 3
In addition to lubricating (reducing friction between moving parts), engine oil performs what functions? 1. Cools 2. Seals 3. Cleans 4. Prevents Corrosion 5. Cushions impact (Shock) loads
1, 2, 3, 4, 5
In addition to lubricating (reducing friction between moving parts), engine oil performs what functions? 1. Cools 2. Seals 3. Cleans 4. Prevents corrosion 5. Cushions impact (shock) loads
1, 2, 3, 4, 5
Which of the following are features of an ideal fire detection system? 1. Illuminates a light on the flight deck which indicates the location of the fire 2. Sets off an audible alarm 3. Low number or no false alarms 4. Resettable when the fire is out 5. Minimum electrical current requirements
1, 2, 3, 4, 5
During inspection, turbine engine components exposed to high temperatures may only be marked with such materials as allowed by the manufacturer. These materials generally include 1. Layout dye 2. Commercial felt tip marker 3. Wax or grease pencil 4. Chalk 5. Graphite lead pencil
1, 2, 4
Which of the following are distinct circuits of a high-tension magneto? 1. Magnetic 2. Primary 3. E-gap 4. P-lead 5. Secondary
1, 2, 5
Which of the following factors affect the thermal efficiency of a turbine engine? 1. Turbine inlet temperature 2. Compression ratio 3. Ambient temperature 4. Speed of the aircraft 5. Turbine and compressor efficiency 6. Altitude of the aircraft
1, 2, 5
Regarding the following statements about ON-OFF two-position engine electrical switches, which of the following statements is true? 1. The toggle should move in the same direction as the desired motion of the unit controlled 2. Inadvertent operation of a switch can be prevented by a guarded switch 3. The ON position is reached by a forward or upward motion
1, 2, and 3 are correct
Reciprocating engine exhaust system designs commonly used to provide for ease of installation and/or allow for expansion and contraction, may include the use of 1. Spring loaded ball/flexible joints 2. Slip joints 3. Bellows 4. Flexible metal tubing
1, 2, and/or 3
Engine crankshaft run-out is usually checked 1. During engine overhaul 2. During annual inspection 3. After a prop strike or sudden engine stoppage 4. During the 100 hour inspection
1, 3
Engine crankshaft runout is usually checked 1. During engine overhaul 2. During annual inspection 3. After a 'prop strike' or sudden engine stoppage 4. During 100-hour inspection
1, 3
Which of the following are true concerning structural inspection of engine parts during an engine overhaul? 1. Dye penetrant can be used on aluminum, stainless, and titanium 2. Eddy current inspection requires bare metal surfaces to be effective 3. Resonance ultra-sound inspection is primarily used for thickness measurement 4. Magnetic particle inspection requires fluorescent developer to see the results 5. X-rays can be used to check the structural integrity of an engine component.
1, 3, 5
Which of the following are included in a typical turbine engine ignition system? 1. Two igniter plugs 2. Two transformers 3. One exciter unit 4. Two intermediate ignition leads 5. Two low-tension igniter leads 6. Two high-tension igniter leads
1, 3, 6
Which of the following can cause fan blade shingling in a turbofan engine? 1. Engine overspeed 2. Engine overtemperature 3. Large, rapid throttle movements 4. FOD
1, 4
Of the following, which are factors in the selection of the size of wire used in a particular application? 1. Voltage drop 2. Current loss 3. Heat gain 4. Allowable power loss 5. Current carrying capability
1, 4, 5
What are the three basic regulating components of a sea level boosted turbocharger system? 1. Exhaust bypass assembly 2. Compressor assembly 3. Pump and bearing assembly 4. Density controller 5. Differential pressure controller
1, 4, 5
What are the three basic regulating components of a sea-level boosted turbocharger system? 1. Exhaust bypass assembly 2. Compressor assembly 3. Pump and bearing assembly 4. Density controller 5. Differential pressure controller
1, 4, 5
Which of the following variables affect the inlet air density of a turbine engine? 1. Speed of the aircraft 2. Compression ratio 3. Turbine inlet temperature 4. Altitude of the aircraft 5. Ambient Temperature 6. Turbine and compressor efficiency
1, 4, 5
Which of the following are distinct circuits on a high-tension magneto? 1. Magnetic 2. Primary 3. E-gap 4. P-Lead 5. Secondary
1,2,5
A nine-cylinder engine with a bore of 5.5 inches and a stroke of 6 inches will have a total piston displacement of...
1,283 cubic inches
The density of air is very important when mixing fuel and air to obtain a correct fuel-to-air ratio. Which of the following weighs the most?
100 parts of dry air
What is the ampere-hour rating of a storage battery that is designed to deliver 45 amperes for 2.5 hours?
112.5 ampere-hour
Maximum power is normally considered to be developed in a reciprocating engine with a fuel/air mixture ratio ratio of approximately...
12:1
Which Federal Aviation Regulation requirement prevents the use of automatic reset circuit breakers?
14 CFR Part 23
Which Federal Aviation Regulation specifies that each resettable circuit protective device requires a manual operation to restore service after the device has interrupted the circuit?
14 CFR Part 23
Which of the following contains a minimum checklist for 100-hour inspections of engines?
14 CFR Part 43 Appendix D
Which of the following Federal Aviation Regulations require that all aircraft using fuses as the circuit protective devices carry "one spare set of fuses, or three spare fuses of each kind required"?
14 CFR Part 91
The Federal Aviation Regulations require the fuel flow rate for gravity systems (main and reserve) to be...
150 percent of the takeoff fuel consumption of the engine
What is the radial location of the two North poles of a four pole rotating magnet in a high tension magneto?
180 degrees apart
What is the radial location of the two north poles of a four-pole rotating magnet in a high-tension magneto?
180 degrees apart
Of the following, which are true of small, in-line, light-sport aircraft engines? 1. Water-cooled only 2. Most are 2 cycle engines 3. They have constant speed propellers 4. Use a single crankshaft 5. Are radial in design
2 and 4
What are two parts of a distributor in an aircraft engine ignition system? 1. Coil 2. Block 3. Stator 4. Rotor 5. Transformer
2 and 4
The maximum allowable voltage drop between the generator and the bus bar is...
2 percent of the regulator voltage
An oil tank having a capacity of 5 gallons must have and expansion space of...
2 quarts
An oil tank having a capacity of 5 gallons, must have an expansion space of...
2 quarts
Which of the following are included in a turbine engine exciter unit? 1. Two igniter plugs 2. Two transformers 3. Two storage capacitors
2, 3
Turbojet and turbofan thrust reverser systems are generally powered by 1. Fuel pressure 2. Electricity 3. Hydraulic pressure 4. Pneumatic pressure
2, 3, 4
What are the parts of a distributor in an aircraft engine ignition system? 1. Coil 2. Block 3. Stator 4. Rotor 5. Tranmsformer
2, 4
Which of the following are true concerning emergency solder repairs of broken wires? 1. Solder repair of broken wires is only allowed on aluminum wires 2. A permanent crimped splice connector is preferred to a solder repair 3. A solder repair is preferred to a terminal splice 4. Some manufacturers prohibit splicing 5. Potting compound and a sleeve are used to complete a soldered wire repair
2, 4, 5
Which of the following discrepancies require replacement of the instrument? 1. Red line missing from glass 2. Glass cracked 3. Case paint chipped 4. Will not zero out 5. Pointer loose on shaft 6. Mounting screw loose 7. Leaking at line B nut 8. Fogged
2, 4, 5, 8
Using the following information, determine how many degrees the crankshaft will rotate with both the intake and exhaust valves seated. Intake opens 15 degrees: BTDC Exhaust opens 70 degrees: BBDC Intake closes 45 degrees: ABDC Exhaust closes 10 degrees: ATDC
245 Degrees
Standard sea level pressure is...
29.92" Hg
Which of the following may be used to accomplish internal inspection of an assembled turbine engine? 1. Infrared photography 2. Ultrasound 3. A borescope 4. Fluorescent penetrant and ultraviolet light
3
How many of the following are factors in establishing the maximum compression ratio limitations of an aircraft engine? 1. Detonation characteristics of the fuel used 2. Design limitations of the engine 3. Degree of supercharging 4. Spark plug reach
3 (Detonation characteristics of the fuel used, Design limitations of the engine, Degree of supercharging)
Turbine engine components exposed to high temperatures generally may NOT be marked with 1. Layout dye 2. Commercial felt tip marker 3. Wax or grease pencil 4. Chalk 5. Graphite lead pencil
3 and 5
Which of the following light-sport aircraft engines begin as automobile engines which are then remanufactured and modified for aircraft use? 1. HKS 700T 2. Jabiru 3300 3. Revmaster R2300 4. Aeromax Aviation 100IFB 5. Great Plains 2276 6. Continental 0-200
3, 4, 5
Which of the following will decrease volumetric efficiency in a reciprocating engine? 1. Full throttle operation 2. Low cylinder head temperature 3. Improper valve timing 4. Sharp bends in the induction system 5. High carburetor air temperatures
3, 4, 5
Which of the following will decrease volumetric efficiency in a reciprocating engine? 1. Full throttle operation 2. Low cylinder head temperatures 3. Improper valve timing 4. Sharp bends in the induction system 5. High carburetor air temperatures
3, 4, 5
When a reciprocating aircraft engine is started, what is the maximum time period to wait for an indication of oil pressure?
30 Seconds
Boost manifold pressure is generally considered to be any manifold pressure above...
30 inches Hg
Ground boosted engine manifold pressure is generally considered to be any manifold pressure above...
30 inches Hg
On turbojet powered airplanes, thrust reversers are capable of producing between...
35 to 50 percent of the rate thrust in the reverse direction
How many secondary coils are required in a low-tension ignition system on an 18-cylinder engine?
36
Ignition occurs at 28 degrees BTDC on a certain four-stroke cycle engine, and the intake valve opens at 15 degrees BTDC. How many degrees of crankshaft travel after ignition does the intake valve open? (Consider one cylinder only)
373 degrees
What is the frequency of most aircraft alternating current?
400 Hertz
At what speed must a crankshaft turn if each cylinder of a four-stroke cycle engine is to be fired 200 times a minute?
400 RPM
Which of the following instrument conditions is acceptable and does NOT require immediate correction? 1. Red line missing 2. Pointer loose on shaft 3. Glass cracked 4. Mounting screws loose 5. Case paint chipped 6. Leaking at line B nut 7. Will not zero out 8. Fogged
5
The typical fuel to oil ratio for a two-stroke cycle light-sport aircraft engine is...
50 to 1
Using standard atmospheric conditions, the standard sea level temperature is...
59 degrees Fahrenheit
What speed must an eight-pole AC generator turn to produce 400-Hertz AC?
6,000 RPM
It is recommended that wire bundles contain no more than...
75 wires
The volume of a cylinder equals 70 cubic inches when the piston is at bottom center. When the piston is at the top of the cylinder, the volume equals 10 cubic inches. What is the compression ratio?
7:1
How many hours will a 140 ampere-hour battery deliver 15 amperes?
9.33 hours
Which of the following assists in removing heat from the metal walls and fins of an air-cooled cylinder assembly?
A baffle and cowl arrangement
What is the operating principle of the spot detector sensor in a fire detection system?
A bimetallic thermal switch that closes when heated to a high temperature
Capacitance afterfiring in most modern spark plugs is reduced by the use of...
A built-in resistor in each spark plug
Which of the following statements most accurately describes spark plug heat range?
A cold plug is designed so that the insulator ti is reasonably short to hasten the rate of heat transfer from the tip through the spark plug shell to the cylinder head
What device is used to convert alternating current, which has been induced into the loops of the rotating armature of a DC generator, to direct current?
A commutator
What is meant by a double entry centrifugal compressor?
A compressor with vanes on both sides of the impeller
The indication on a thermocouple-type cylinder head temperature indicator is produced by...
A current generated by the temperature difference between dissimilar metal hot and cold junctions
What is referred to as blade profile of a turbine engine compressor blade?
A cutout that reduces blade tip thickness
During ground check an engine is found to be rough-running, the magneto drop is normal, and the manifold pressure is higher than normal for any given RPM. The trouble may be caused by...
A dead cylinder
Carburetor icing on an engine equipped with a constant-speed propeller can be detected by...
A decrease in manifold pressure with a constant RPM
The use of carburetor heat when it is not needed causes...
A decrease in power and possible detonation
The use of the carburetor air heater when it is not needed causes...
A decrease in power and possibly detonation
When selecting an electrical switch for installation in an aircraft circuit utilizing a direct current motor,
A derating factor should be applied
Reciprocating engines used in helicopters are cooled by...
A fan mounted on the engine
Hot spots on the tail cone of a turbine engine are possible indicators of a malfunctioning fuel nozzle or...
A faulty combustion chamber
When internally timing a magneto, the breaker points being to open when the rotating magnet is...
A few degrees past the neutral position
If it is found that a shielded ignition system does not adequately reduce ignition noise, it may be necessary to install...
A filter between the magneto and magneto switch
A turboshaft engine can be defined as...
A gas turbine engine that delivers power through a shaft to operate something other than a propeller
Compressor stall is caused by...
A high angle of attack airflow through the first stages of compressor
What test instrument could be used to test an ignition harness for suspected leakage?
A high tension lead tester
How does the ignition system of a gas turbine engine differ from that of a reciprocating engine?
A high-energy spark is required for ignition
When testing a magneto distributor block for electrical leakage, which of the following pieces of test equipment should be used?
A high-tension harness tester
When starting a turbine engine,
A hot start is indicated if the exhaust gas temperature exceeds specified limits
When starting a turbine engine...
A hot start is indicated if the exhaust gas temperature exceeds specified limits
Vortex dissipator systems are generally activated by...
A landing gear switch
What normally prevents a Hartzell Compact propeller from going to feather when the engine is shut down on the ground?
A latch mechanism composed of springs and lock pins
If a float-type carburetor becomes flooded, the condition is most likely caused by...
A leaking needle valve and seat assembly
A weak fuel to air mixture along with normal airflow through a turbine engine may result in...
A lean die-out
The explosive cartridge in the discharge valve of a fire extinguisher container is...
A life dated unit
The explosive cartridge in the discharge valve of a fire-extinguisher container is...
A life-dated unit
What is the difference between a low-tension and a high-tension engine ignition system?
A low-tension system uses a transformer coil near the spark plugs to boost voltage, while the high-tension system voltage is constant from the magneto to the spark plugs
Removal or propeller blade tips withing Type Certificate Data Sheet limits when correcting a defect is...
A major repair
Hot spots can burn a hole in the combustion section liner on a turbine engine. This is caused by...
A misaligned fuel nozzle resulting in a flame that is not centered in the flame area
Which fuel/air mixture will result in the highest engine temperature (all other factors remaining constant)?
A mixture leaner than a manual lean mixture of .060
By using a differential pressure compression tester, it is determined that the number 3 cylinder of a nine-cylinder radial engine will not hold pressure after the crankshaft has been rotated 260 degrees from top dead center compression stroke number 1 cylinder. How can this indication usually be interpreted?
A normal indication
A condition known as 'hot streaking' in turbine engines is caused by...
A partially clogged fuel nozzle
The fuel systems of aircraft certificated in the standard classification must include which of the following?
A positive means of shutting off the fuel to all engines
What is the profile of a turbine engine compressor blade?
A reduced blade tip thickness
When spark plugs are removed from an aircraft engine,
A replacement plug must be used if a spark plug is dropped
The use of less than normal throttle opening during starting will cause...
A rich mixture
Upon inspection of the spark plugs in an aircraft engine, the plugs were found caked with a heavy black soot. This indicates...
A rich mixture
What is the first engine instrument indication of a successful start of a turbine engine?
A rise in exhaust gas temperature
What is the first engine instrument indication of a successful start to a turbine engine?
A rise in exhaust gas temperature
If the ignition switch is moved from BOTH to either LEFT or RIGHT during an engine ground check, a normal operation is usually indicated by...
A slight drop in RPM
When performing a magneto ground check on an engine, correct operation is indicated by...
A slight drop in RPM
The valve clearance of an engine using hydraulic lifters, when the lifters are completely flat, or empty, should not exceed...
A specified amount above zero
On an engine equipped with a pressure-type carburetor, fuel supply in the idling range is ensured by the inclusion in the carburetor of...
A spring in the unmetered fuel chamber to supplement the action of normal metering forces
On an engine equipped with a pressure type carburetor, fuel supply in the idling range is ensured by the inclusion in the carburetor of...
A spring in the unmetered fuel chamber to supplement the action of the normal metering forces
In automatic starting systems on small reciprocating engine aircraft,
A starter solenoid is energized to allow current to flow to the starter motor
A pilot reports that the fuel pressure fluctuates and exceeds the upper limits whenever the throttle is advanced. The most likely cause of the trouble is...
A sticking fuel pump relief valve
The vortex dissipators installed on some turbine powered aircraft to prevent engine FOD utilize...
A stream of engine bleed air blown toward the ground ahead of the engine
Bootstrapping of a turbocharged engine is indicated by...
A transient increase in engine power
High cylinder head temperatures are likely to result from...
A very lean mixture at high power settings
To obtain the correct gap setting on a spark plug before it is installed in an aircraft engine...
A wire thickness gauge should be used
What will be the likely result if the piston ring gaps happen to be aligned when performing a differential-pressure compression check on a cylinder?
A worn or defective ring(s) indication
The energy to turn the propeller on a turboprop engine is typically produced by...
Additional turbine stages
What is a basic advantage of using AC for electrical power for a large aircraft?
AC systems operate at higher voltage than DC systems and therefore use less current and can use smaller and lighter weight wiring
When installing electrical wiring parallel to a fuel line, the wiring should be...
Above the fuel line
What device will allow an automatic speed and output of the turbocharger requiring no pilot action up to critical altitude?
Absolute pressure controller
If an engine equipped with a float-type carburetor backfires or misses when the throttle is advanced, a likely cause is that the...
Accelerating pump is not operating properly
A carburetor is prevented from leaning out during quick acceleration by the...
Accelerating system
Newton's Law of Motion, generally termed the "Law of Momentum," states:
Acceleration is produced when a force acts on a mass. The greater the mass, the greater the amount of force needed
What component is used to ensure fuel delivery during periods of rapid engine acceleration?
Acceleration pump
The stationary field strength in a direct current generator is varied...
According to the load requirements
What is commonly used to clean accessible condensers and coil cases in a magneto?
Acetone
What should be used to clean grease or carbon tracks from capacitors or coils that are used in magnetos?
Acetone
Where do stress rupture cracks usually appear on turbine blades?
Across the leading or trailing edge at a right angle to the edge length
The fuel metering force of a conventional float-type carburetor in its normal operating range is the difference between the pressure acting on the discharge nozzle located within the venturi and the pressure...
Acting on the fuel in the float chamber
The fuel metering forced of a conventional float-type carburetor in its normal operating range is the difference between the low air pressure acting on the discharge nozzle located within the venturi and the atmospheric pressure...
Acting on the fuel in the float chamber
Airflow to the pneumatic starter from a ground unit is normally prevented from causing starter overspeed during engine start by...
Activation of a flyweight cutout switch
An aircraft engine having at least one continuous hour of operation with an oil temperature of at least 165 degrees Fahrenheit within 30 days is said to be in...
Active storage
Which method is commonly used to adjust the level of a float in a float-type carburetor?
Add or remove shims under the needle-valve seat
A constant-speed propeller provides maximum efficiency by...
Adjusting blade angle for most conditions encountered in flight
A propeller synchrophasing system allows a pilot to reduce noise and vibration by...
Adjusting the phase angle between the propellers on an aircraft's engines
A supervisory electronic engine control (EEC) is a system that receives engine operating information and...
Adjusts a standard hydromechanical fuel control unit to obtain the most effective engine operation
What will be the results of increasing the gap of the breaker points in a magneto?
Advance the spark and decrease its intensity
What operational force tends to increase propeller blade angle?
Aerodynamic twisting force
The thermal efficiency of an engine...
Affects the fuel consumption of an engine
Where is the engine fuel shutoff valve usually located?
Aft of the firewall
Generally, when starting a turbine engine, the starter should be disengaged...
After the engine has reached self-accelerating speed
Where is the throttle valve located on a float-type carburetor?
After the main discharge nozzle and venturi
The primary purpose of the air bleed openings used with continuous flow fuel injector nozzles is to...
Aid in proper fuel vaporization
The purpose of an intercooler when used with a turbocharger to cool the...
Air entering the carburetor from the turbocharger
The purpose of an aftercooler when used with a turbocharged engine is to cool the...
Air entering the induction system from the turbocharger
Carburetor icing is most severe at...
Air temperatures between 30 and 40 degrees Fahrenheit
During the operation of an aircraft engine, the pressure drop in the carburetor venturi depends primarily upon the...
Air velocity
When inspecting an aircraft reciprocating engine what document is used to determine if the proper magnetos are installed?
Aircraft Engine Specifications or Type Certificate Data Sheets
A Cessna 180 aircraft has McCauley propeller Model Number 2A34C50/90A. The propeller is severely damaged in a ground accident, and this model propeller is not available for replacement. Which of the following should be used to find and approved alternate replacement?
Aircraft Specifications/Type Certificate Data Sheets
A Cessna 180 aircraft has a McCauley propeller Model No. 2A34C50/90A. The propeller is severely damaged in a ground accident, and this model propeller is not available for replacement. Which of the following should be used to find an approved alternate replacement?
Aircraft Specifications/Type Certificate Data Sheets
What section in the instructions for continued airworthiness is FAA approved?
Airworthiness limitations section
Carburetor icing may be eliminated by which of the following methods?
Alcohol spray and heated induction air
An aircraft engine continuous cylinder fuel injection system normally discharged fuel during which strokes?
All (continuously)
An aircraft engine continuous cylinder fuel injection system normally discharges fuel during which stroke(s)?
All (continuously)
At what engine speed does the main metering jet actually function as a metering jet in a float-type carburetor?
All RPM's above idle range
At which engine speed does the main metering jet actually function as a metering jet in a float-type carburetor?
All RPM's above idle range
Defective spark plugs will cause the engine to run rough at...
All speeds
Defective spark plugs will cause the engine will cause the engine to rough at...
All speeds
If the turbocharger waste gate is completely closed,
All the exhaust gases are directed through the turbine
If the turbocharger waste gate is completely closed...
All the exhaust gases are directed through the turbine
A cool-off period prior to shutdown of a turbine engine is accomplished in order to...
Allows the turbine wheel to cool before the case contracts around it
Where do stress rupture cracks on a turbine engine usually appear on turbine blades?
Along the leading edge or trailing edge at right angle to the edge length
A reciprocating engine automatic mixture control responds to changes in air density caused by changes in...
Altitude or temperature
Which of the following is NOT an input parameter for a turbine engine fuel control unit?
Ambient humidity
On a typical engine trim check chart included in the manufacturer's maintenance data, what are the two main variables for which trim valves are adjusted?
Ambient temperature and barometric pressure
Aircraft electrical is manufactured in sizes according to a standard known as...
American Wire Gauge (AWG)
Aircraft electrical wire size is measured according to the...
American Wire Gauge system
High tooth pressures and high rubbing velocities, such as occur with spur-type gears, require the use of...
An EP lubricant
What method is ordinarily used to make idle speed adjustments on a float-type carburetor?
An adjustable throttle stop or linkage
Cold straightening a bent aluminum propeller blade may be accomplished by...
An appropriately rated repair station or the manufacturer
The thrust produced by a rotating propeller is a result of...
An area of decreased pressure immediately in front of the propeller blades
The thrust produced by rotating a propeller is a result of...
An area of decreased pressure immediately in front of the propeller blades
An APU is usually rotated during start by...
An electric starter
The fuel-flow indicator rotor and needle for motor-impeller and turbine indicating system is driven by...
An electrical signal
What is a squid as it relates to a fire extinguishing system?
An electrically operated explosive device
Backfiring through a carburetor generally results from the use of...
An excessively lean mixture
One cause of after firing in an aircraft engine is...
An excessively rich mixture
One cause of afterfiring in an aircraft engine is...
An excessively rich mixture
An excessively lean fuel/air mixture may cause...
An increase in cylinder head temperature
Which of the following causes a single diaphragm acceleration pump to discharge fuel?
An increase in manifold pressure that occurs when the throttle is open
Which of the following causes a single diaphragm accelerator pump to discharge fuel?
An increase in manifold pressure that occurs when the throttle valve is opened
When checking the idle mixture on a carburetor, the engine should be idling normally, then pull the mixture control toward the IDLE CUTOFF position. A correct idling mixture will be indicated by...
An increase of 10 to 50 RPM before decreasing
In an aircraft equipped with a pressure-drop type fuel-flow indicating system, if one of the injector nozzles becomes restricted, this would cause a decrease in fuel flow with...
An increased fuel flow indication on the gauge
A liquid cooling system is employed on the Rotax 582 series engine. Circulation of the coolant is accomplished by...
An integrated engine water pump
Generator voltage will not build up when the field is flashed and solder is found on the brush cover plate. These are most likely indication of...
An open armature
If an aircraft ignition switch is turned off and the engine continues to run normally, the trouble is probably caused by...
An open ground lead in the magneto
Failure of an engine to cease firing after turning the magneto switch off is an indication of...
An open p-lead to ground
Which of the following defects is cause for reject of wood propellers?
An oversize hub or bolthole, or elongated boltholes
When a new carburetor is installed on an engine,
And the engine is warmed up to normal operating temperature, adjust the idle mixture, and then the idle speed
Grease used in aircraft propellers reduces the frictional resistance of moving parts and is easily molded into any form under pressure. This statement defines...
Antifriction and plasticity characteristics of grease
Select the Airworthiness Directive applicability statement which applied to an IVO-355 engine, serial number T8164, with 2,100 hours' total time and 300 hours since rebuilding.
Applies to all IVO-355 engines, serial numbers T8000 through T8300, having less than 2,400 hours' total time
During which of the following conditions of flight will the blade pitch angle of a constant-speed propeller be the greatest?
Approach to landing
Turbine engine emissions...
Are caused by high combustion temperatures
The breaker-less capacitor discharge ignition systems with integrated generators used on most Rotax engines...
Are completely free of maintenance
Thermocouple leads...
Are designed for a specific installation and may not be altered
Light corrosion preventative compounds...
Are intended to preserve an engine for less than 30 days and to spray cylinders
When must an Airworthiness Directive (AD) be complied with after it becomes effective?
As specified in the AD
What type of oil do most engine manufacturer's recommend after new reciprocating engine break-in?
Ashless-dispersant oil
What type of oil do most engine manufacturers recommend after new reciprocating engine break-in?
Ashless-dispersant oil
Great Plains engines for light sport aircraft are...
Assembled in the field from manufacturer kits or by the manufacturer
In a reciprocating engine oil system, the temperature bulb senses oil temperature...
At a point after the oil has passed through the oil cooler
How often should float carburetors be overhauled?
At engine overhaul
When will small induction system air leaks have the most noticeable effect on engine operation?
At low RPM
If an engine with a stroke of 6 inches is operated at 2,000 RPM, the piston movement within the cylinder will be...
At maximum velocity 90 degrees after TDC
At what point in an axial-flow turbojet engine will the highest gas pressures occur?
At the compressor outlet
When does valve overlap occur in the operation of an aircraft reciprocating engine?
At the end of the exhaust stroke and the beginning of the intake stroke
Which statement is true regarding jet engines?
At the higher engine speeds, thrust increases rapidly with small increases in RPM
Where should the main fuel strainer be located in the aircraft fuel system?
At the lowest point in the fuel system
In a turbine engine dc capacitor discharge ignition system, where are the high-voltage pulses formed?
At the triggering transformer
Many APU engine hoses...
Attach to fittings in the APU compartment
What could cause a lean mixture and high cylinder head temperature at sea level or low altitudes?
Automatic mixture control stuck in the extended position
Fuel scheduling during APU start and under varying pneumatic bleed and electrical loads is maintained...
Automatically by the APU fuel control system
Pneumatic starters contain a turbine which is driven by air and rotates the reduction gear train through a sprag clutch. The clutch is...
Automatically engaged and automatically disengaged
After a fire is extinguished, or overheat condition removed in aircraft equipped with a Systron-Donner fire detector, the detection system...
Automatically resets
Fire protection systems are mandatory on...
Auxiliary power unit
Pneumatic starters are usually designed with what type of airflow impingement system?
Axial flow turbine
Which of the following, obtained during magneto check at 1,700 RPM, indicates a short (grounded) circuit between the right magneto primary and the ignition switch?
BOTH -- 1,700 RPM, R -- 0 RPM, L -- 1,700 RPM, OFF -- 0 RPM
When using a timing light to time a magneto to an aircraft engine, the magneto switch should be placed in the...
BOTH position
Which of the following is least likely to occur during operation of an engine equipped with a direct cylinder fuel injection system?
Backfiring
If the intake valve is opened too early in the cycle of operation of a four-stroke cycle engine, it may result in...
Backfiring into the induction system
Fuel pump relief valves designed to compensate for atmospheric pressure variations are known as...
Balanced-type relief valves
During the inspection of an engine control system in which push-pull control rods are used, the threaded rod ends should...
Be checked for the amount of thread engagement by means of the inspection holes
On a carburetor without an automatic mixture control as you ascend to altitude, the mixture will...
Be enriched
On a carburetor without an automatic mixture control, as you ascend to altitude, the mixture will...
Be enriched
Maximum taper contact between crankshaft and propeller hub is determined by using...
Bearing blue color transfer
Why must a float-type carburetor supply a rich mixture during idle?
Because at idling speeds the engine may not have enough airflow around the cylinders to provide proper cooling
In a four-stroke cycle aircraft engine, when does the ignition event take place?
Before the piston reaches TDC on compression stroke
Direct mechanical push-pull carburetor heat control linkages should normally be adjusted so that the stop located on the diverter valve will be contacted...
Before the stop at the control lever is reached in both HOT and COLD positions
The spark is produced in a magneto ignition system when the breaker points are...
Beginning to open
Where physical separation of the fuel lines from electrical wiring or conduit is impracticable, locate the fuel line...
Below the wiring and clamp the line securely to the airframe structure
The time/current capacities of a circuit breaker or fuse must be...
Below those of the associated conductor
One of the things a metering orifice in a main air bleed helps to accomplish (at a given altitude) in a carburetor is...
Better fuel vaporization and control of fuel discharge, especially at lower engine speeds
What does valve overlap promote?
Better scavenging and cooling characteristics
The throttle valve of float-type aircraft carburetors is located...
Between the venturi and the engine
The throttle valve of float-type carburetors is located...
Between the venturi and the engine
Which of the following statements about constant-speed counterweight propellers is also true when referring to two-position counterweight propellers?
Blade angle changes are accomplished by the use of two forces, one hydraulic and the other centrifugal
What will happen to the propeller blade angle and the engine RPM if the tension on the propeller governor control spring (speeder spring) is increased?
Blade angle will decrease and RPM will increase
Which of the following is identified as the cambered or curved side of a propeller blade corresponding to the upper surface of a wind airfoil section?
Blade back
Which of the following is identified as the cambered or curved side of a propeller blade, corresponding to the upper surface of a wind airfoil section?
Blade back
How are the teeth of the gears in the accessory section of an engine normally lubricated?
By splashed or sprayed oil
1. Preignition is caused by improper ignition timing 2. Detonation occurs when an area of the combustion chamber becomes incandescent and ignites the fuel air mixture in advance of normal timed ignition.
Both number one and number two are false
Instruments that measure relatively high fluid pressures, such as oil pressure gauges, are usually what type?
Bourdon tube
The actual power delivered to the propeller of an aircraft engine is called...
Brake horsepower
What type of nuts are used to hold an exhaust system to the cylinders?
Brass or heat-resistant high temperature locknuts
What retains the nitrogen charge and fire-extinguishing agent in a high rate of discharge (HRD) container?
Breakable disk and fusible disk
Possible failure related ferrous-metal particles in turbine engine oil cause an (electrical) indicating-type magnetic chip detector to indicate their presence by...
Bridging the gap between the detector center (positive) electrode and the ground electrode
Indentations on bearing races are caused by high static loads are known as...
Brinelling
Indentations on bearing races caused by high static loads are known as...
Brinelling
Which of the following is the safest fire-extinguishing agent to use from a standpoint of toxicity and corrosion hazards?
Bromotriflouromethane (Halon 1301)
A defective primary capacitor in a magneto is indicated by...
Burned and pitted breaker points
Which of the following influences the operation of an automatic fuel control on a turbojet engine?
Burner pressure
Which of the following influences the operation of an automatic fuel control unit on a turbojet engine?
Burner pressure
A reassembled, overhauled engine must undergo testing before it can released for service. The purposes of the test run include...
Burnishing the crankshaft bearings and run-in on the piston rings
Detonation occurs when the fuel/air mixture...
Burns too fast
How are the rotor windings of an aircraft alternator usually excited?
By a variable direct current
How does the propeller overspeed governor on a turboprop engine decrease propeller RPM?
By allowing oil to escape from the propeller hub thus driving the blades to a increased blade angle
How are discharge nozzles in a fuel injected reciprocating engine identified to indicate the flow range?
By an identification letter stamped on one of the hexes of the nozzle body
How is anti-ice fluid ejected from the slinger ring on a propeller?
By centrifugal force
How is anti-icing fluid ejected from the slinger ring on a propeller?
By centrifugal force
How is the speed of a constant-speed propeller changed in flight?
By changing the load tension against the flyweights in the governor
How should ceramic-coated exhaust components be cleaned?
By degreasing
If a continuous-loop fire detection system is giving a false alarm, how can it be determined if the problem is in the control unit or in the sensing loop?
By disconnecting the loop from the control box and observing if the false alarm stops
How do the turbines which are driven by the exhaust gases of a turbo-compound engine contribute to total engine power output?
By driving the crankshaft through suitable couplings
How can a steel propeller hub be test for cracks?
By magnetic particle inspection
How can a steel propeller hub be tested for cracks
By magnetic particle inspection
How are the piston pins of must aircraft engines lubricated?
By oil which is sprayed or thrown by the master or connecting rods
How is proper end-gap clearance on new piston rings assured during the overhaul of an engine?
By placing the rings in the cylinder and measuring the end-gap with a feeler gauge
How is the engine fire extinguishing agent discharged on the Boeing 777 and most other transport category aircraft?
By pulling the fire handle and rotating it to the mechanic stop
How are combustion liner walls cooled in a gas turbine engine?
By secondary air flowing through the combustion chamber
How is aircraft electrical power for propeller deicer systems transferred from the engine to the propeller hub assembly?
By slip rings and brushes
The cylinders of an aircraft engine are mounted on cylinder pads that are machine onto the crankcase. The common method of attachment of the cylinders to the crankcase is...
By studs mounted in threaded holes in the crankcase
How is a propeller controlled in a large aircraft with a turboprop installation?
By the engine power lever
How are most radial engine spark plug wires connected to the distributor block?
By use of cable-piercing screws
If a full-flow oil filter is used on an aircraft engine, and the filter becomes completely clogged, the...
Bypass valve will open and the oil pump will supply unfiltered oil to the engine
If an oil filter element becomes completely clogged, the...
Bypass valve will open and the oil pump will supply unfiltered oil to the engine
In which type of turbine engine combustion chamber is the case and liner removed and installed as one unit during routine maintenance?
Can
Optical fire detection systems...
Can be infrared or ultraviolet
Manual mixture control systems in float-type carburetors...
Can use a needle-type system or a back-suction type arrangement
In addition to its FAA certified engines, Lycoming Engines produces an experimental, non-certified version of its O-233 series engine for light sport aircraft. It features...
Capability of running on AVGAS or unleaded automotive fuel
The type of ignition system used on most turbine aircraft engines is...
Capacitor discharge
The most satisfactory extinguishing agent for an electrical fire is...
Carbon dioxide
The most satisfactory extinguishing agent for tailpipe or intake fire is...
Carbon dioxide
During full power output of an unsupercharged engine equipped with a float-type carburetor, in which of the following areas will the highest pressure exist?
Carburetor air scoop
Which instrument gives information concerning the extent to which an engine's fuel primer system should be used for starting?
Carburetor air temperature
The greatest portion of head generated by combustion in a typical aircraft reciprocating engine is...
Carried out with the exhaust gases
The greatest portion of heat generated by combustion in a typical aircraft reciprocating engine is...
Carried out with the exhaust gases
An induction system leak near the cylinder will...
Cause a lean mixture
In a supervisory EEC system, any fault in the EEC that adversely affects engine operation...
Causes an immediate reversion to control by the hydromechanical fuel control unit
In a supervisory engine control EEC, any fault in the EEC that adversely affects engine operation...
Causes an immediate reversion to control by the hydromechanical fuel control unit
What operational force causes the greatest stress on a propeller?
Centrifugal force
Which of the following forces or combination of forces operates to move the blades of a constant-speed counterweight-type propeller to the HIGH PITCH position?
Centrifugal force acting on the counterweights
During the on-speed condition of a propeller, the...
Centrifugal force of the governor flyweights is equal to the speeder spring tension
Which of the following can inspect and approve an engine major repair for return to service?
Certificated mechanic with inspection authorization
The primary purpose of the propeller is to...
Change engine horsepower into thrust
The primary purpose of a propeller is to...
Change engine horsepower to thrust
During idle mixture adjustments, which of the following is normally observed to determine when the correct mixture has been achieved?
Changes in RPM or manifold pressure
If the RPM of an axial-flow compressor remains constant, the angle of attack of the rotor blades can be changed by...
Changing the velocity of the airflow
Which type of valve prevents oil from entering the main accessory case when the engine is not running?
Check
Which of the following component inspections is to be accomplished on a 100-hour inspection?
Check cylinder compression
An engine misses in both the right and left positions of the magneto switch. The quickest method for locating the trouble is to...
Check for one or more cold cylinders
What advantage do mineral base lubricants have over vegetable oil base lubricants when used in aircraft engines?
Chemical stability
Blade angel is an angle formed by a line perpendicular to the crankshaft and a line formed by the...
Chord of the blade
Blade angle is an angle formed by a line perpendicular to the crankshaft and a line formed by the...
Chord of the blade
Propeller blade angle is the angle between the...
Chord of the blade and the rotational plane of the propeller
Jet engine thermocouples are usually constructed of...
Chromel-alumel
On small aircraft engines, fuel vaporization may be increased by...
Circulating the fuel and air mixture through passages in the oil sump
A fuel or oil fire is defined as a...
Class B fire
A fire involving energized electrical equipment is defined as a...
Class C fire
What type of fireproof connector is used in areas where it is vital that the electric current is not interrupted, even though the connector may be exposed to continuous open flame?
Class K connector
What is the possible cause of an engine running rich at full throttle if it is equipped with a float-type carburetor?
Clogged main air bleed
The position of the cowl flaps during normal cruise flight conditions is...
Closed
The pulling out (or down) of an illuminated fire handle in a typical large jet aircraft fire protection system commonly accomplishes what events?
Closes fuel shutoff, closes hydraulic shutoff, disconnects the generator field, and arms the fire extinguishing system
When necessary, APU engine cooling before shutdown may be accomplished by...
Closing the bleed air valve
If a fire starts in the induction system during the engine starting procedure, what should the operator do?
Continue cranking the engine
Before removing a fuel hose from an engine, a solenoid operated fuel valve is placed in the closed position by...
Closing the solenoid fuel valves with battery power and then disconnecting battery
Which of the following breaker point characteristics is associated with a faulty capacitor?
Coarse grained
Which of the following breaker points characteristics is associated with a faulty capacitor?
Coarse grained
When starting and engine equipped with a carburetor air heater, in what position should the heater be placed?
Cold
When starting an engine equipped with a carburetor air heater, in what position should the heater control be placed?
Cold position
Which of the following methods is used to straighten a bent aluminum propeller blade that is within repairable limits?
Cold straightening only
The primary source of oil contamination in a normally operating reciprocating engine is...
Combustion deposits due to combustion chamber blow-by and oil migration on the cylinder walls
What turbine engine section provides for proper mixing of the fuel and air?
Combustion section
The purpose of the diaphragm in most vane-type fuel pumps is to...
Compensate fuel pressure to altitude changes
What is the purpose of a normalized turbocharger system used on a small reciprocating aircraft engine?
Compresses air to maintain manifold pressure constant from sea level to the critical altitude of the engine
What is the purpose of a turbocharger system for a small reciprocating aircraft engine?
Compresses air to maintain manifold pressure constant from sea level to the critical altitude of the engine
What action takes place when the cockpit control lever for a hydromatic, constant-speed propeller is actuated?
Compression of the speeder spring is changed
If the exhaust valve of a four-stroke cycle engine is closed and the intake valve is just closed, the piston is on the...
Compression stroke
Which pressure input into EFCU to control fuel metering to the engine?
Compressor discharge pressure
If a turbine engine is unable to reach takeoff EPR before its EGT limit is reaches, this is an indication that the...
Compressor may be contaminated or damaged
At what stage in a turbine engine are gas pressures the greatest?
Compressor outlet
What is a result of "flashover" in a distributor?
Conductive carbon trail
What is the result of 'flashover' in a distributor?
Conductive carbon trail
Fuel system inspection and maintenance...
Consists of an examination of the system for conformity to design requirements and functional tests to prove correct operation
A turbine engine dry sump lubrication system of the self-contained, high-pressure design...
Consists of pressure, breather, and scavenge subsystems
The Brayton Cycle is known as the...
Constant pressure cycle
The generating system of an aircraft charges the battery by using...
Constant voltage and varying current
How does carbon dioxide (CO2) extinguish an aircraft engine fire?
Contact with the air converts the liquid into snow and gas which smothers the flames
Turbofan engine inlets...
Contain sound reducing materials
A major difference between the Teledyne-Continental and RSA (Precision Airmotive or Bendix) continuous flow fuel injection systems in fuel metering is that the...
Continental system uses fuel pressure only as a metering force
When does current flow through the coil of a solenoid-operated electrical switch?
Continually, as long as the control circuit is complete
On a typical gas turbine engine, the starter...
Continues to crank until after self-accelerating speed has been reached
What is one purpose of the stator blades in the compressor section of a turbine engine?
Control the direction of the airflow
The floating control thermostat, used on some reciprocating engine installations, helps regulate oil temperature by...
Controlling air flow through the oil cooler
The floating control thermostat used on some reciprocating aircraft engine installations help regulate oil temperature by...
Controlling airflow through the oil cooler
On a FADEC system aircraft, the EEC...
Controls many engine subsystems as well as the FMU
How do cowl flaps aid in cooling a horizontally opposed aircraft engine?
Controls the amount of air flowing around the cylinders
What is the purpose of the rate-of-change controller in a turbocharger system?
Controls the rate at which the turbocharger discharge pressure will increase
The stator vanes in an axial-flow compressor...
Convert velocity energy into pressure energy
The tappet assembly...
Converts rotational movement of the cam lobe into reciprocating motion
What is the primary purpose of the oil-to-fuel heat exchanger?
Cool the oil
Aircraft reciprocating engine cylinder baffles and deflectors should be repaired as required to prevent loss of...
Cooling
In general, the two most common materials for conductors in aircraft applications are:
Copper and aluminum
When removing a shielded spark plug, which of the following is most likely to be damaged?
Core insulator
What is the principle of operation of the continuous-loop fire detector system sensor?
Core resistance material which prevents current flow at normal temperature
What is the principle of operation of the continuous loop fire detection system sensor?
Core resistance material which prevents current flow at normal temperatures
Propeller aerodynamic (thrust) imbalance can be largely eliminated by...
Correct blade contouring and angle setting
Why is high nickel chromium steel used in many exhaust systems?
Corrosion resistance and low expansion coefficient
A common visual check of fire detection elements includes...
Cracked or broken sections
A turbine engine hot section is particularly susceptible to which kind of damage?
Cracking
The hot section of a turbine engine is particularly susceptible to which of the following kind of damage?
Cracking
Which of the following conditions is usually not acceptable to any extent in turbine blades?
Cracks
Inspection of propeller blades by dye-penetrant inspection is accomplished to detect...
Cracks or other defects
Inspection of propeller blades by dye-penetrant inspection is accomplished to detect?
Cracks or other defects
What is the purpose of the flow divider in a turbine engine duplex fuel nozzle system?
Creates the primary and secondary fuel supplies
What is the purpose of the flow divider in a turbine engine duplex fuel nozzle?
Creates the primary and secondary fuel supplies
Continued and/or excessive heat and centrifugal force on turbine engine rotor blades is likely to cause...
Creep
What term is used to describe a permanent and cumulative deformation of the turbine blades of a turbojet engine?
Creep
To what altitude will a turbo charged engine maintain sea level pressure?
Critical altitude
To what altitude will a turbocharger maintain sea level pressure...
Critical altitude
A ground incident that results in propeller sudden stoppage may require a crankshaft run-out inspection. What publication would be used to obtain crankshaft run-out tolerance?
Current manufacturer's maintenance instructions
A ground incident that results in propeller sudden stoppage would require a crankshaft runout inspection. What publication would be used to obtain crankshaft runout tolerance?
Current manufacturer's maintenance instructions
What is required by 14 CFR Part 43 Appendix D when performing an annual/100-hour inspection on a reciprocating engine aircraft?
Cylinder compression check
Where are cooling fins usually located on air-cooled engines?
Cylinder head, cylinder barrel, and inside the piston
Where are cooling fins located on the outside of air-cooled engines?
Cylinder heads and cylinder barrels
Compression ratio is the ratio between the...
Cylinder volume with piston at bottom dead center and at top dead center
What results if a turbine engine is operated with excessively high EGT?
Damage to the turbine section and/or reduced turbine component life
Increased engine heat will cause volumetric efficiency to...
Decrease
During engine operation, if carburetor heat is applied, it will...
Decrease air density to the carburetor
Stator blades in the compressor of an axial-flow turbine engine...
Decrease air velocity and prevent swirling
Excessive valve clearance will cause the duration of valve opening to...
Decrease for both intake and exhaust valves
Excessive valve clearances will cause the duration of valve opening to...
Decrease for both intake and exhaust valves
One purpose of an air bleed in a float-type carburetor is to...
Decrease fuel density and destroy surface tension
One purpose of an air bleed in a float-type carburetor is...
Decrease fuel density and destroy surface tension
Stator blades in the compressor section of an axial-flow turbine engine...
Decrease the air velocity and prevent swirling
The compressor stators in a gas turbine engine act as diffusers to...
Decrease the velocity of the gas flow
The application of carburetor heat during engine operation will...
Decrease the weight of the fuel/air charge
Ice formation on propellers, when an aircraft is in flight, will...
Decrease thrust and cause excessive vibration
Ice formation on propellers, when and aircraft is in flight, will...
Decrease thrust and cause excessive vibration
Increased water vapor (higher relative humidity) in the incoming air to a reciprocating engine will normally result in which of the following?
Decreased engine power at a constant RPM and manifold pressure
The pressure of subsonic air as it flows through a convergent nozzle...
Decreases
The pressure of supersonic air as it flows through a divergent nozzle...
Decreases
An indication that the optimum idle mixture has been obtained occurs when the mixture control is moved to IDLE CUTOFF and manifold pressure...
Decreases and RPM increases momentarily before the engine ceases to fire
Excessive valve clearance in a piston engine...
Decreases valve overlap
Which of the following is a characteristic of a thrust bearing used in most radial engines?
Deep-grooved ball
As manifold pressure increases in a reciprocating engine, the...
Dendity of air in the cylinder increases
During visual inspection while overhauling an engine, the piston heads were depressed. This is a sign that...
Detonation had occurred
A full-authority electronic engine control (EEC) is a system that receives all the necessary data for engine operation and...
Develops the commands to various actuators to control engine parameters
Instruments that provide readings of low or negative pressure, such as manifold pressure gauges, are usually what type?
Diaphragm or bellows
The purpose of staggered ignition is to compensate for...
Diluted fuel/air mixture around exhaust valve
When installing an electrical switch, under which of the following conditions should the switch be derated from its nominal current rating?
Direct current motor circuits
What type of electric motor is used with a direct-cranking engine starter?
Direct current series-wound motor
What type of electric motor is generally used with a direct-cranking engine starter?
Direct current, series-wound motor
The purpose of a three-way propeller valve is to...
Direct oil from the engine oil system to the propeller cylinder
The purpose of the flow control valve in a reciprocating aircraft engine oil system is to...
Direct oil through or around the oil cooler
The purpose of the flow control valve in a reciprocating engine oil system is to...
Direct oil through or around the oil cooler
One function of the nozzle diaphragm in a turbine engine is to...
Direct the flow of gases to strike the turbine blades at the desired angle
What is the function of the inlet guide vane assembly on an axial-flow compressor?
Directs air onto the first stage rotor blades at the proper angle
In addition to changing oil regularly, the condition of an engine can be...
Discerned by the amount of metal chips found on the magnetic chip detector
The purpose of the undercurrent relay in a starter-generator system is to...
Disconnect power from the starter-generator and ignition when sufficient engine speed is reached
The purposed of an under current relay in a starter-generator system is to...
Disconnect power from the starter-generator and ignition when sufficient engine speed is reached
Sodium-filled valves are advantageous to an aviation engine because they...
Dissipate heat well
Specific gravity is a comparison of the weight of a substance to the weight of an equal volume of...
Distilled water at a specific temeperature
A certain nine-cylinder radial engine used a noncompensated single-unit, dual-type magneto with a four-pole rotating magnet and separately mounted distributors. Which of the following will have the lowest RPM at any given engine speed?
Distributors
Engine pressure ratio is determined by...
Dividing turbine outlet total pressure by engine inlet total pressure
Select the statement which is correct relating to a fuel level check of a float-type carburetor...
Do not measure the level at the edge of the float chamber
Igniter plugs used in turbine engines are subjected to high intensity spark discharges and yet they have a long service life because they...
Do not require continuous operation
A turbine engine compressor which contains vanes on both sides of the impeller is a...
Double entry centrifugal compressor
In turbine engines that utilize a pressurization and dump valve, the dump portion of the valve...
Drains the engine manifold lines to prevent fuel boiling and subsequent deposits in the lines as a result of residual engine heat (at engine shutdown)
A safety feature usually employed in pneumatic starters that is used if the clutch does not release from the engine drive at the proper time during start is the...
Drive shaft shear point
Accessories such as electric generators and hydraulic pumps on turbine powered aircraft are...
Driven at reduced speed from the high pressure compressor via a reduction gear box
The turbine section of a jet engine...
Drives the compressor section
One way that the automatic ignition relight systems are activated on gas turbine engines is by a...
Drop in compressor discharge pressure
What type of oil system is usually found on turbine engines?
Dry sump, pressure, and spray
The Rotax 447, 503, and 582 engines all have breaker-less magneto capacitor discharge ignition systems, however, the larger engines have...
Dual ignition for each cylinder
Magneto breaker point opening relative to the position of the rotating magnet and distributor rotor (internal timing) can be set most accurately...
During assembly of the magneto before installation on the engine
An aircraft reciprocating engine using hydraulic valve lifters is observed to have no clearance in its valve-operating mechanism after the minimum inlet oil and cylinder head temperatures for takeoff have been reached. When can this condition be expected?
During normal operation
Lube system last chance filters in turbine engines are usually cleaned...
During overhaul
Valve overlap is defined as the number of degrees of crankshaft travel...
During which both valves are off their seats
What method would be used to inspect an aluminum propeller blade when a crack is suspected?
Dye-pentrant
Which two engine parameters on a turboprop engine are used to compute takeoff power from the ambient pressure and temperature prevailing at the time of takeoff?
EGT and torquemeter pressure
When troubleshooting an engine for too rich a mixture to allow the engine to idle, what would be a possible cause?
Economizer valve not operating correctly
The actual distance a propeller moves forward through the air during one revolution is known as the...
Effective pitch
Geometric pitch of a propeller is defined as the...
Effective pitch plus slippage
Geometric pitch of a propeller is defined as...
Effective pitch plus slippage
A common type of electrically operated oil temperature gauge utilizes...
Either a wheatstone bridge or ratiometer circuit
Which statement is true concerning inlet icing of turbine engines?
Electric anti-icing is found on many types of turboprop engines rather than turbofan engines
How is the oil pressure delivery on a hydromatic propeller normally stopped after the blades have reached their full-feathered position?
Electric cutout pressure switch
How are most aircraft turbine engine fire-extinguishing systems activated?
Electrically discharged cartridges
Spark plugs are considered worn out when the...
Electrodes have worn away to about one-half of their original dimensions
What special procedure must be followed when adjusting the valves of an engine equipped with a floating cam ring?
Eliminate cam bearing clearance when making valve adjustment
It is important that nicks in aluminum alloy propeller blades be repaired as soon as possible in order to...
Eliminate stress concentration points
The primary purpose of a feathering propeller is to...
Eliminate the drag created by a windmilling propeller when an engine fails in flight
The purpose of two or more valve springs in aircraft engines is to...
Eliminate valve spring surge
An advantage of a low-tension ignition system use on aircraft reciprocating engines is...
Elimination of high voltage used in the distributor
Turbine engine parts can be cleaned with...
Emulsion-type cleaners or chlorinated solvents
Propeller deicer boots are...
Energized for short periods by a cycling timer
What precaution should be taken when putting thread lubricant on a tapered pipe plug in a carburetor float bowl?
Engage the first thread of the plug, then put a small amount of lubricant on the second thread and screw the plug in
What publication contains the mandatory replacement time for parts of a turbine engine?
Engine Manufacturer's service instructions
Anti-icing of jet engine air inlets is commonly accomplished by...
Engine bleed air ducted through the critical areas
Reciprocating engine cooling system consist of...
Engine cowling, cylinder baffles, cylinder fins, and some use a type of cowl flaps
Turbine engines produce noise primarily from engine air intake, vibration, and engine exhaust. Which of these is of the greatest concern?
Engine exhaust noise from the high velocity jet stream moving through a relatively quiet atmosphere
Which of the following engine servicing operations generally requires engine pre-oiling prior to starting the engine?
Engine installation
What is the possible cause when a turbine engine indicates no change in power setting parameters, but oil temperature is high?
Engine main bearing distress
Which of the following should a mechanic consult to determine the maximum amount of cylinder cooling fin that could be removed when cracks are found?
Engine manufacturer's service or overhaul manual
In which of the following situations will the oil cooler automatic bypass valve be open the greatest amount?
Engine oil below normal operating temperature
What actuates the pilot valve in the governor of a constant-speed propeller?
Engine oil pressure
A Hydromatic propeller differs from most constant-speed propellers in that...
Engine oil pressure balances governor oil pressure
What instrument indicates the thrust of a gas turbine engine?
Engine pressure ratio indicator
The electrical circuit from the spark plug back to the magneto is completed by grounding through the...
Engine structure
The engine pressure ratio (EPR) indicator is a direct indication of...
Engine thrust being produced
If the idling jet becomes clogged in a float-type carburetor, the...
Engine will not idle
If the ground wire of a magneto is disconnected at the ignition switch, the result will be the...
Engine will not stop running when the ignition switch is turned off
If the oil pressure of a cold engine is higher than at normal operating temperatures, the...
Engine's lubricating system is probably operating normally
An oil separator is generally associated with which of the following...
Engine-driven vacuum pump
An oil separator is generally associated with which of the following/
Engine-driven vacuum pump
A fuel pressure relief valve is required on...
Engine-driven vane-type fuel pumps
When operating an engine, the application of carburetor heat will have what effect on the fuel/air mixture?
Enriching the mixture until the AMC can make a compensation
When preparing an engine for service that has been preserved, care should be taken to...
Ensure all corrosion-preventative compound is drained from the engine cylinders
The active clearance control (ACC) portion of an EEC system aids turbine engine efficiency by...
Ensuring turbine blade to engine case clearances are kept to a minimum by controlling case temperature
Engine oil temperature gauges indicate the temperature of the oil...
Entering the engine
What maintenance record(s) is/are required following a major repair of an aircraft engine?
Entries in the engine maintenance record and FAA Form 337
The recurrent ingestion of dust or other fine airborne particulates into a turbine engine can result in...
Erosion damage to the compressor and turbine sections
Newton's First Law of Motion, generally termed the Law of Inertia, states:
Every body persists in its state of rest, or of motion in a straight line, unless acted upon by some outside force
Reduced air density at high altitude has a decided effect on carburetion, resulting in a reduction of engine power by...
Excessively enriching the fuel/air mixture
Augmenter tubes are part of which reciprocating engine system?
Exhaust
In what section of a turbojet engine is the jet nozzle located?
Exhaust
On which strokes are both valves on a four-stroke cycle reciprocating aircraft engine open?
Exhaust and intake
Which of the following is used to monitor the mechanical integrity of the turbines, as well as to check engine operating conditions of a turbine engine?
Exhaust gas temperature
Oil picks up the most heat from which of the following turbine engine components?
Exhaust turbine bearing
A hissing sound from the exhaust stacks when the propeller is being pulled through manually indicates...
Exhaust valve blow-by
What part of an air-cooled cylinder assembly has the greatest fin area per square inch?
Exhaust valve port
Turbine blades are generally more susceptible to operating damage than compressor blades because of...
Exposure to high temperatures
Oil accumulation in the cylinders of an inverted in-line engine and in the lower cylinders of a radial engine is normally reduced or prevented by...
Extended cylinder skirts
As a general rule, the mixture setting on a reciprocating engine operating at or near takeoff power that provides the best cooling is...
FULL RICH
In an aircraft ignition system, one of the functions of the capacitor is to...
Facilitate a more rapid collapse of the magnetic field in the primary coil
When starting a turbine engine, a hung start is indicated if the engine...
Fails to reach idle RPM
An aircraft should be facing into the wind when trimming an engine. However, if the velocity of the wind blowing into the intake is excessive, it is likely to cause a...
False high compression and turbine discharge pressure, and a subsequent low trim
What air is used to cool the exterior and nacelle of a turbofan engine?
Fan air
The primary reason for careful inspection and prompt repairing of minor surface defects such as scratches, nicks, gouges, etc. on aluminum alloy propellers is to prevent...
Fatigue failure
Ignition check during engine runup indicates excessive RPM drop during operation on the right magneto. The major portion of the RPM loss occurs rapidly after switching to the right magneto position (fast drop). The most likely cause is...
Faulty or fouled spark plugs
Longitudinal (fore and aft) clearance of constant-speed propeller blades or cuffs must be at least 1/2 inch (12.7 mm) between propeller parts and stationary parts of the aircraft. This clearance is with the propeller blades...
Feathered or in the most critical pitch condition
The holding coil on a hydromatic propeller feathering button switch holds a solenoid relay closed that applies power to the propeller...
Feathering pump motor
The airworthiness standards for the issue of type certificates for small airplanes with nine or less passenger seats in the normal, utility, and acrobatic categories may be found in the...
Federal Aviation Regulations, Part 23
What publication is used for guidance to determine whether a powerplant repair is major or minor?
Federal Aviation Regulations, Part 43, Appendix A
After control signals are sent from the Electronic Engine Control (EEC) to regulate fuel flow to the engine,
Feedback from several systems in the engine is sent back to the EEC
Proper operation of electric deicing boots on individual propeller blades may best be determined by...
Feeling the sequence of boot heating and have an assistant observe the loadmeter indications
The fire detection system that uses a single wire surrounded by a continuous string of ceramic beds in a tube is the...
Fenwal system
The procedure for removing the accumulation of dirt deposits on compressor blades is called...
Field cleaning
Minor surface damage located in a repairable area, but not on the leading or trailing edges of aluminum blades, may be repaired by first...
Filing with a riffle file
Aircraft engine spark plugs should be installed...
Finger tight and torqued with a torque wrench
The component(s) in a turbine engine that operate(s) at the highest temperatures is/are the...
First stage turbine nozzle guide vanes
The breaking loose of small pieces of metal from coated surfaces, usually caused by defective plating or excessive loads is called...
Flaking
The breaking loose of small pieces of metal from coated surfaces, usually caused by defective plating or excessive loads, is called...
Flaking
Which type of propeller shaft is used on most modern reciprocating and turboprop engines?
Flanged
During an operational check of an electrically powered aircraft engine cowl flap system, the motor fails to operate. Which of the following is the first to be checked?
Flap actuator motor circuit breaker
If a float-type carburetor leaks fuel when the engine is stopped, a likely cause is that the...
Float needle valve is worn or otherwise not seated properly
If a float-type carburetor leaks fuel when the engine is stopped,, a likely cause is that the...
Float needle valve is worn or otherwise not seated properly
An integral alternator is driven by...
Fly wheel driven by crankshaft
In older reciprocating aircraft inertia starting systems, energy for cranking the engine is stored in the...
Flywheel
Newton's Third Law of Motion states that...
For every reaction there is an equal and opposite reaction
The purpose of an exhaust gas analyzer is to indicate the...
Fuel/air ratio being burned in the cylinders
Why is expansion space required in an engine oil supply tank?
For oil enlargement and collection of foam
When an overhauled engine is test run before being put into service, a club propeller is used...
For proper cooling and the correct load on the engines
The primary purpose of baffles and deflectors installed around cylinders of air-cooled aircraft engines is to...
Force cooling air into close contact with all parts of the cylinders
As the flux density in the field of a DC generator increases and the current flow to the system increases, the...
Force required to turn the generator increases
Prolonged idling of an engine will usually result in...
Foreign material buildup on spark plugs
A drop in oil pressure may be caused by...
Foreign material under the relief valve
The maximum number of terminals that may be connected to any one terminal stud in an aircraft electrical system...
Four
What is the maximum number of bonding jumper wires that may be attached to one terminal grounded to a flat surface?
Four
When running-up an engine and testing a newly installed hydromatic propeller, it is necessary to exercise the propeller by moving the governor control through its entire travel several times to...
Free the dome of any entrapped air
Basically, the indicator of a tachometer system is responsive to change in...
Frequency
The RPM indication of a synchronous ac motor-tachometer is governed by the generator...
Frequency
Propellers exposed to salt spray should be flushed with...
Fresh water
Fuel is discharged for idling speeds on a float-type carburetor...
From the idle discharge nozzle
Engine pressure ratio is the total pressure ratio between the...
Front of the compressor and the rear of the turbine
Which unit most accurately indicates fuel consumption of a reciprocating engine?
Fuel flowmeter
Which statement is correct regarding a continuous flow fuel injection system used on many reciprocating engines?
Fuel is injected at each cylinder intake port
Which of the following lubrication system components is never located between the pressure pump and the engine pressure system?
Fuel line for oil dilution system
The fuel-flow indication data sent from motor driven impeller and turbine, and motorless type fuel flow transmitters is a measure of...
Fuel mass-flow
The fuel flowmeter used with a continuous-fuel injection system installed on an aircraft horizontally opposed reciprocating engines measures the fuel pressure drop across the...
Fuel nozzles
The fuel-flow indication system used with many fuel-injected opposed engine airplanes utilizes a measure of...
Fuel pressure
What causes the fuel divider valve to open in a turbine engine duplex fuel nozzle?
Fuel pressure
What should be checked/changed to ensue the validity of turbine engine performance check if an alternate fuel is to be used?
Fuel specific gravity setting
What should be checked/changed to ensure the validity of a turbine engine performance check if an alternate fuel is to be used?
Fuel specific gravity setting
The greatest density of flux lines in the magnetic circuit of a rotating magnet-type magneto occurs when the magnet is in what position?
Full alignment with the field shoe faces
The greatest density of flux lines in the magnetic circuit of a rotating magnet-type magneto occurs when the magnet is in what postion?
Full alignment with the field shoe faces
In what position is the constant-speed propeller control placed to check the magnetos?
Full increase, low propeller blade pitch angle
What is the postion of the cowl flaps during engine starting and warmup operations under normal conditions
Full open at all times
What is approximate position of the rotating magnet in a high-tension magneto when the points first close?
Full register
What is the approximate position of the rotating magnet in a high-tension magneto when the points first close?
Full register
In addition to idle speed adjustment during synchronization,
Full takeoff RMP must be able to be obtained
When preparing to remove an engine, fuel valves must be...
Fully closed even if they are solenoid operated
During ground operation of an engine, the cowl flaps should be in what position?
Fully open
A severe condition of chafing or fretting in which a transfer of metal from one part to another occurs is called...
Galling
Severe rubbing of turbine engine compressor blades will usually cause...
Galling
What basic meter is used to indicate cylinder head temperature in most aircraft?
Galvonometer
As an aid to cold-weather starting, the oil dilution system thins the oil with...
Gasoline
What is used to drive a supercharger?
Gear train from the crankshaft
In regard to using a turbine engine oil analysis program, which of the following is NOT true?
Generally, an accurate trend forecast may be made after an engine's first oil sample analysis
In regards to using a turbine engine oil analysis program, which of the following is NOT true?
Generally, an accurate trend forecast may be made after an engine's first oil sample analysis
If a generator is malfunctioning, its voltage can be reduced to residual by actuating the...
Generator master switch
If the points in a vibrator-type voltage regulator stick in the closed position while the generator is operating, what will be the probable result?
Generator output voltage will increase
The operating temperature valve clearance of a radial engine as compared to cold valve clearance is...
Greater
Apparent engine roughness is often a result of propeller unbalance. The effect of an unbalanced propeller will usually be...
Greater at high RPM
What is the primary advantage of an axial-flow compressor over a centrifugal compressor?
Greater pressure ratio
What is the primary advantage of an axial-flow compressor over a centrifugal flow compressor...
Greater pressure ratio
The centrifugal twisting force acting on a propeller blade is...
Greater than the aerodynamic twisting force and tends to move the blade to a lower angle
Magneto breaker points must be timed to open when the...
Greatest magnetic field stress exists in the magneto circuit
What likely effect would a cracked distributor rotor have on a magneto?
Ground the secondary circuit through the crack
In order to turn a magneto off, the primary circuit must be...
Grounded
When the switch is off in a magneto ignition system, the primary circuit is...
Grounded
The generally acceptable way to obtain accurate on-site temperature prior to performing engine trimming is to...
Hang a thermometer in the shade of the nose wheel-well until the temperature reading stabilizes
What will be the effect if the spark plugs are gapped too wide?
Hard starting
What will be the effect of a spark plug that is gapped too wide?
Hard starting
The crankpin is...
Hardened by nitriding and is hollow to reduce weight
What effect does high atmospheric humidity have on the operation of a jet engine?
Has little or no effect
A full authority digital electronic control (FADEC)...
Has no hydromechanical fuel control back-up
The Rotax 914 engine is a lightweight, four cylinder opposed engine that...
Has water cooled heads and air cooled cylinder barrels
Turbofan engines...
Have either a mixed or separate exhaust nozzle
The general requirements for an aircraft engine include efficiency, reliability, and a low weight-to-horsepower ratio. It also must...
Have good fuel economy, high durability, and be capable of sustained high power output
Compared to reciprocating engine oils, the types of oils used in turbine engines...
Have less tendency to produce lacquer or coke
Standard aircraft cylinder oversizes usually range from 0.010 inch to 0.030 inch. Oversize o automobile engines may range up to 0.100 inch. This is because aircraft engine cylinders...
Have relatively thin walls and may be nitrided
Standard aircraft cylinder oversizes usually range from 0.010 inch to 0.030 inch. Oversize on automobile engine cylinders may rang up to 0.100 inch. This is because aircraft engine cylinders...
Have relatively thin walls and may be nitrided
Reciprocating engine starters...
Have starting limits which restrict continuous cranking to one minute
Alternators (AC generators) that are driven by a constant-speed drive (CSD) mechanism are used to regulate the alternator to a constant...
Hertz output
On aircraft equipped with hydraulically operated constant-speed propellers, all ignition and magneto checking is done with propeller in which position?
High RPM
Engines using cold stream or cold and hot stream reversing include...
High bypass turbofan engines
Engines using cold stream, or both cold and hot stream reversing include...
High bypass turbofans
Which of these characteristics is desirable in turbine engine oil?
High flash point
The capacitor type ignition system is used almost universally on turbine engines primarily because of its high voltage and...
High heat intensity spark
What is the best indication of worn valve guides?
High oil consumption
An advantage of the axial-flow compressor is its...
High peak efficiency
Which of the following best describes the blade movement of a full-feathering , constant-speed propeller that is in the LOW RPM position when the feathering action is begun?
High pitch directly to feather position
The primary advantage of pneumatic (air turbine) starters over comparable electric starters for turbine engines is...
High power-to-weight ratio
What are the rotational speed and blade pitch angle requirements during takeoff?
High speed and low pitch angle
The coil pack of a FADEC ignition system for a reciprocating engine are...
High voltage units that fire according to crankshaft position
The capacitor-type ignition system is used almost universally on turbine engines primarily because of its high voltage and...
High-heat intensity
What are the rotational speed and blade pitch angle requirements of a constant-speed propeller during takeoff?
High-speed and low-pitch angle
How does a dual axial-flow compressor improve the efficiency of a turbojet engine?
Higher compression ratios can be obtained
Compared to normally aspirated engines, turbocharged engine exhaust systems operate at...
Higher temperatures and high pressures
The principle fault in the pressure type fuel flowmeter indicating system, installed on a horizontally opposed continuous-flow fuel injected aircraft reciprocating engine, is that plugged fuel injection nozzle will cause a...
Higher than normal fuel flow indication
How is the strength of a magneto magnet checked?
Hold the points open and check the output of the primary coil with an ac ammeter while operating the magneto at a specified speed
How is the strength of the magneto magnet checked?
Hold the points open and check the output of the primary coil with an ac ammeter while operating the magneto at a specified speed
Which of the following indicates that a combustion chamber of a jet engine is not operating properly?
Hot spots on the tail cone
Thermocouples are usually inserted or installed on the...
Hottest cylinder of the engine
Propeller blade stations are measured from the...
Hub centerline
Propeller blade station numbers increase from...
Hub to tip
Reciprocating engine power will be decreased at all altitudes if the...
Humidity is increased
In a typical starter-generator system, under which of the following starting circumstances may it be necessary to use the start stop button?
Hung start
Hot spots on the tail cone of a turbine engine exhaust...
Indicate a problem in the combustion section of the engine
In a typical starter-generator system, under which of the following starting circumstances may it be necessary to use the stop-start switch?
Hung start
A condition that can occur in radial engines but is unlikely to occur in horizontally opposed engines is...
Hydraulic lock
Turbojet and turbofan thrust reverser systems are generally powered by...
Hydraulics or pneumatics
Which type of fuel control is used on most of today's turbine engines?
Hydromechanical or Electronic
An increase in manifold pressure when carburetor heat is applied indicates...
Ice was forming in the carburetor
An engine becomes overheated due to excessive taxiing or improper ground runup. Prior to shutdown, operation must continue until cylinders have cooled, by running engine at...
Idle RPM
In a turbine engine, where is the turbine discharge pressure indicator sensor located?
Immediately aft of the last turbine stage
A cold cylinder check is performed...
Immediately after engine shutdown
The exhaust section of a turbine engine is designed to...
Impart a high exit velocity to the exhaust gases
What are the two functional elements in a centrifugal compressor?
Impeller and diffuser
What are the two functional elements of the centrifugal flow compressor?
Impeller and diffuser
Which of the following would be a factor in the failure of an engine to develop full power at takeoff?
Improper adjustment of carburetor heat valve control linkage
Which of the following could cause damage to the nose ceramic or to the electrode of an aircraft spark plug?
Improper gapping procedure
Three types of turbine blades are...
Impulse, reaction, impulse-reaction
What type of a turbine blade is most commonly used in aircraft jet engines?
Impulse-reaction
.Engines that are not flown regularly may not achieve normal service life due to corrosion...
In and around the cylinders
What is the electrical location of the primary capacitor in a high tension magneto?
In parallel with the breaker points
What is the electrical location of the primary capacitor in a high-tension magneto?
In parallel with the breaker points
Which of the following statements regarding magneto switch circuits is NOT true?
In the BOTH position, the right and left magneto circuits are grounded
Where are the high and low pitch stops of a Hamilton Standard constant-speed or two-position counterweight propeller located?
In the counterweight assembly
Where are sludge chambers, when used in aircraft engine lubrication systems, usually located?
In the crankshaft throws
Where are the sludge cambers when used in aircraft engine lubrication systems usually located?
In the crankshaft throws
Where is the highest gas pressure in a turbojet engine?
In the entrance of the burner section
The basic oil pressure relief valve setting for a newly overhauled engine is made...
In the overhaul shop
Lubricating oils with high viscosity index ratings are oils...
In which the viscosity does not vary much with temperature change
Excessively rich or lean idle mixtures result in...
Incomplete combustion
Under which of the following conditions would an engine run lean even though there is a normal amount of fuel present?
Incomplete fuel vaporization
Ignition check during engine runup indicates a slow drop in RPM. This is usually caused by...
Incorrect ignition timing or valve adjustment
An increase in manifold pressure with a constant RPM will cause the bearing load in an engine to...
Increase
If the volume of air passing through a carburetor venturi is reduced, the pressure at the venturi throat will..
Increase
An exhaust cone placed aft of the turbine in a jet engine will cause the pressure in the first part of the exhaust duct to...
Increase and the velocity to decrease
In order to stabilize cams, springs, and leakages withing the fuel control, manufacturers generally recommend that all final turbine engine trim adjustments be made in the...
Increase direction
In order to stabilize cams, springs, and linkages within the fuel control, manufacturers generally recommend that all final turbine engine trim adjustments be made in the...
Increase direction
The primary purpose of a cuff on a propeller is to...
Increase flow of cooling air to the engine nacelle
The aerodynamic force acting on a rotating propeller blade operating at a normal pitch angle tends to...
Increase the pitch angle
The action of a carburetor air scoop is to supply air to the carburetor, but it may also...
Increase the pressure of the incoming air by ram effect
The action of a carburetor airscoop is to supply air to the carburetor, but it may also...
Increase the pressure of the incoming air by ram effect
The stators in the turbine section of a gas turbine engine...
Increase the velocity of the gas flow
Turbine inlet nozzle assembly located on the upstream side of each turbine wheel are used in the gas turbine engine to...
Increase the velocity of the gases flowing past this point
Turbine nozzle diaphragms located on the upstream side of each turbine wheel, are used in the as turbine engine to...
Increase the velocity of the heated gases flowing past this point
A powerplant using a hydraulically controlled constant-speed propeller is operating within the propeller's constant-speed range at a fixed throttle setting. If the tension of the propeller governor control spring (speeder spring) is reduced by movement of the cockpit propeller control, the propeller blade angle will...
Increase, engine manifold pressure will increase, and engine RPM will decrease
As an aircraft engine's speed is increased, the voltage induced in the primary coil of the magneto...
Increases
The velocity of subsonic air as it flows through a convergent nozzle...
Increases
The velocity of supersonic air as it flows through a divergent nozzle...
Increases
Which of the following is a function of the fuel oil heat exchanger on a turbojet engine?
Increases fuel temperature
Which of the following is a function of the fuel-oil heat exchanger on turbojet engine?
Increases fuel temperature
The economizer system in a float-type carburetor...
Increases the fuel air ratio at high power settings
Counterweight on constant-speed propellers are generally used to aid in...
Increasing blade angle
Counterweights on constant-speed propellers are generally used to aid in...
Increasing blade angle
Ram recovery refers to...
Increasing pressure and airflow to make up for thrust loss at high speeds
A spark plug is fouled when...
It's spark grounds without jumping electrodes
In a high-tension ignition system, the current in the magneto secondary winding is...
Induced when the primary circuit is interrupted
The fuel pump relief valve directs excess fuel to the...
Inlet side of the fuel pump
Which of the following statements concerning the installation of a new fixed-pitch wood propeller is true?
Inspect the bolts for tightness after the first flight and again after the first 25 hours of flying
Air turbine starters are generally designed so that reduction gear distress or damage may be detected by...
Inspection of a magnetic chip detector
When mounting a replacement engine, always...
Install the manufacturer specified bolts and torque to the manufacturer recommended value
What would be the probable result if the oil system pressure relief valve should stick in the open position on a turbine engine?
Insufficient lubrication
Which of the following would be cause for rejection of a spark plug?
Insulator tip cracked
On which stroke are both valves on a four-stroke cycle reciprocating engine open?
Intake and exhaust
A hissing sound coming from the carburetor when the propeller is pulled through manually indicates...
Intake valve blow-by
The five event of a four-stroke cycle engine in the order of their occurrence are...
Intake, compression, ignition, power, exhaust
The five events of a four stroke cycle engine, in the order of their occurrence, are...
Intake, compression, ignition, power, exhaust
Idle cutoff is accomplished on a carburetor equipped with a back-suction mixture control by...
Introducing low pressure (intake manifold) air into the float chamber
FADEC...
Is a solid state ignition and fuel control system on reciprocating engines
The desired engine idle speed and mixture setting...
Is adjusted with engine warmed up and operatig
Staking a valve...
Is an attempt to dislodge foreign material from the valve face/seat interface
As a general rule, a small amount of small fuzzy particles or gray metallic paste on a turbine engine magnetic chip detector...
Is considered to be the result of normal wear
The pumping capacity of the scavenger pump in a dry sump aircraft engine's lubrication system...
Is greater than the capacity of the oil pressure pump
The metered fuel pressure (chamber C) in an injection-type carburetor...
Is held constant throughout the entire engine operating range
When using an electric starter motor, current usage...
Is highest at the start of motor rotation
When using an electric starter motor, the current flow through it...
Is highest at the start of motor rotation
Frequently, an aircraft's auxiliary power unit (APU) generator...
Is identical to the engine-driven generators
According to the electron theory of the flow of electricity, when a properly functioning DC alternator and voltage regulating system is charging an aircraft's battery, the direction of current flow through the battery...
Is into the negative terminal and out the positive terminal
Propulsive efficiency...
Is maximized through the use of constant-speed prop
Repair of exhaust system components...
Is not recommended to be accomplished in the field
A light sport aircraft means an aircraft, other than rotorcraft or power-life, that...
Is powered by a single reciprocating engine if powered
The blade angle of a fixed-pitch propeller...
Is smallest at the tip
When more than one generator is used in parallel, the total rated output...
Is the combined output of both generators
The crankcase of an aircraft engine...
Is the foundation of the engine containing crankshaft bearings and cylinder pads
The constant current method of charging a ni-cad battery...
Is the method most effective in maintaining cell balance
An aircraft's propeller system beta range...
Is used to produce zero or negative thrust
Propeller fluid anti-icing systems generally use which of the following?
Isopropyl alcohol
Propeller fluid-anti-icing systems generally use which of the following?
Isopropyl alcohol
What is the purpose of a slip joint in an exhaust collector ring?
It aids in alignment and absorbs expansion
What is a function of the idling air bleed in a float-type carburetor?
It aids in emulsifying/vaporizing the fuel at idle speeds
What is the purpose of a dump valve as used with fuel on a gas turbine engine?
It drains the engine manifold lines to prevent fuel boiling and subsequent deposits in the lines as a result of residual engine heat (at engine shutdown)
Which of the following statements regarding volumetric efficiency of an engine is true?
It is possible to exceed 100 percent volumetric efficiency of some engines by the use of superchargers of the proper type
Which statement is generally true regarding thrust reverser systems?
It is possible to move some aircraft backward on the ground using reverse thrust
Once an aircraft cylinder wall is ground to an oversize, during overhaul,
It must be resurfaced or honed to the desired finish
What is the purpose of a reverse-current cutout relay?
It opens the main generator circuit whenever the generator voltage drops below the battery voltage
Which statement is correct concerning a thermocouple-type temperature indicating instrument system?
It requires no external power source
What is a characteristic of a centrifugal-type fuel boost pump?
It separates air and vapor from the fuel
Regardless of the type of shipping container used for an engine,
It should contain a visible humidity indicator
One of the advantages of inspecting an aluminum propeller utilizing dye-penetrant inspection procedure is that...
It shows whether visible lines and other marks are actually cracks rather than scratches
The economizer system of a float-type carburetor performs which of the following functions?
It supplies and regulates the additional fuel required for all engine speeds above cruising
How does the aerodynamic twisting force affect operating propeller blades?
It tends to turn the blades to a high blade angle
How does the aerodynamic twisting force affect operation propeller blades?
It tends to turn the blades to a high blade angle
How will the mixture of an engine be affected if the bellows of the automatic mixture control (AMC) in a pressure carburetor ruptures while the engine is operating at altitude?
It will become richer
A spark plug's heat range is the result of...
Its ability to transfer heat from the firing end of the spark plug to the cylinder head
Spark plug heat range is determined by...
Its ability to transfer heat to the cylinder head
Upon what quality or characteristic of a lubricating oil is its viscosity index based?
Its rate of change in viscosity with temperature change
If fuel/air ratio is proper and ignition timing is correct, the combustion process should be completed...
Just after top center at the beginning of the power stroke
If fuel/air ratio is proper timing is correct, the combustion process should be completed...
Just after top center at the beginning of the power stroke
The main oil filters strain the oil at which point in the system?
Just as it leaves the pressure pump
When will the voltage in the secondary winding of a magneto, installed on a normally operating engine, be at its highest value?
Just prior to the spark plug firing
What precaution is usually taken to prevent electrolyte from freezing in a lead acid battery?
Keep the battery fully charged
Kerosene is used as turbine engine fuel because...
Kerosene has more heat energy per gallon and lubricates fuel system components
The fire detection system that uses two wires imbedded in a ceramic core within a tube is the...
Kidde system
Two continuous-loop fire detection systems that will not test due to a broken detector element are the...
Kidde system and the Fenwal system
For takeoff, a constant-speed propeller is normally set in the...
LOW PITCH, high RPM position
Main bearing oil seals used in turbine engines are usually what type?
Labyrinth and/or carbon rubbing
Main bearing oil seals used with turbine engines are usually what type(s)
Labyrinth and/or carbon rubbing
Magneto pole shoes are generally made of...
Laminations of high-grade soft iron
The oil is used in reciprocating engines has a relatively high viscosity due to...
Large clearances and high operating temperatures
How do small feathering propellers prevent feathering when the engine is shut down?
Latches lock the propeller in low pitch to prevent excess load on the engine at start-up
Excessive valve clearance results in the valves opening...
Late and closing early
All of the following are recommended markers for reciprocating engine exhaust systems except...
Lead pencil
If an engine operates with a low oil pressure and a high oil temperature, the problem may be caused by a...
Leaking oil dilution valve
Which of the following would most likely cause a reciprocating engine to backfire through the induction system at low RPM operation?
Lean mixture
Which of the following would most likely cause a reciprocating engine to backfire through the induction system at low RPM?
Lean mixture
The rearward thrust capability of an engine with the thrust reverser system deployed is...
Less than its forward capability
The purpose of a sonic venturi on a turbocharged engine is to...
Limit the amount of air that can flow from the turbocharger into the cabin for pressurization
What is the purpose of the density controller in a turbocharger system?
Limits the maximum manifold pressure that can be produced at full throttle
A fire detection system operates on the principle of a buildup of gas pressure within a tube proportional to temperature. Which of the following systems does this statement define?
Lindberg continuous-element system
A fire detection system operates on the principle of a buildup...
Lindberg continuous-element system
The term 'reach,' as applied to spark plug design and/or type, indicates the...
Linear distance from the shell gasket seat to the end of the threads on the shell skirt
The term reach as applied to spark plug design and/or type indicates the...
Linear distance from the shell gasket seat to the end of the threads on the shell skirt
Reciprocating engine exhaust systems that have repairs or sloppy weld beads which protrude internally are unacceptable because they cause...
Local hot spots
Ball joints in reciprocating engine exhaust systems should be...
Loose enough to permit some movement
An unsupercharged aircraft reciprocating engine, operated at full throttle from sea level, to 10,000 feet, provided the RPM is unchanged, will...
Lose power due to the reduced density of the air drawn into the cylinders
If oil pressure gauge fluctuates over a wide range from zero to normal operating pressure, the most likely cause is...
Low oil supply
Which condition would be least likely to be caused by failed or failing engine bearings?
Low oil temperatures
Which of the following best describes the blade movement of a propeller that is in the high RPM position when reversing action is begun?
Low pitch directly to reverse pitch
Which of the following best describes the blade movement of a feathering propeller that is in the HIGH RPM position when reversing?
Low pitch directly to reversing
Which of the following best describes the blade movement of a feathering propeller that is in HIGH RPM position when the feathering action is begun?
Low pitch through high pitch to feather position
The fan rotational speed of a dual axial compressor forward fan engine is the same as the...
Low-pressure compressor
Some high-volume turboprop and turbojet engines are equipped with two-spool or split compressors. When these engines are operated at high-altitudes, the...
Low-pressure rotor will increase in speed as the compressor load decreases in the lower density air
Which of the following would indicate a general weak-engine condition when operated with a fixed-pitch propeller or test club?
Lower than normal static RPM, full throttle operation
At cruise RPM, some oil will flow through the relief valve of a gear-type engine oil pump. This is normal as the relief valve is set at a pressure which is...
Lower than the pressure pump capabilities
What is used on most turbine engines to monitor engine wear possibly providing notification in advance of an internal engine problem?
Magnetic Chip detectors at key oil scavenge locations
If new breaker points are installed in a magneto on an engine, it will be necessary to time the...
Magneto internally and the magneto to the engine
Alignment of the marks provided for internal timing of a magneto indicates that the...
Magneto is in E-gap position
If a spark plug lead becomes grounded, the...
Magneto will not be affected
When timing a magneto internally, the alignment of the timing marks indicates that the...
Magnets are in the E-gap position
If an engine is equipped with a float-type carburetor and the engine runs excessively rich at full throttle, a possible cause of the trouble is a clogged...
Main air bleed
Fuel crossfeed systems are used in aircraft to...
Maintain aircraft stability
When engine power is increased, the constant-speed propeller tries to function so that it will...
Maintain the RPM, increase the blade angle, and maintain a low angle of attack
The purpose of permanently sealing and partially filling some models of McCauley propeller hubs with dyed oil is to...
Make the location of cracks readily apparent
Hot spots in the combustion section of a turbojet engine are possible indicators of...
Malfunctioning fuel nozzles
At any given RPM, a change in power output can be noted by which engine monitoring instrument
Manifold pressure gauge
To reduce the power output of an engine equipped with a constant-speed propeller and operating near maximum BMEP, the...
Manifold pressure is reduced with the throttle control before the RPM is reduced with the propeller control
Which of the following contains approved data for performing a major repair to an aircraft engine?
Manufacturer's maintenance instructions when FAA approved
Which bearing is least likely to be a roller or ball bearing?
Master rod bearing (radial engine)
The most common method and generally the best conduction of heat from the inside of a cylinder barrel to the cooling air is accomplished by...
Matching fins directly on the outside of the barrel
The purpose of a bellmouth compressor inlet is to...
Maximize aerodynamic efficiency of the inlet
During routine inspection of a reciprocating engine, a deposit of small, bright, metallic particles which do not cling to the magnetic drain plug is discovered in the oil sump and on the surface of the oil filter. This condition...
May be a result of abnormal plain type bearing wear and is cause for further investigation
Friction horsepower...
May be as high as 10-15% of the indicated horsepower on a modern aircraft engine
A broken cooling fin on a cylinder head...
May be filed to smooth contours if damage an/or repair limits are not exceeded
The application of more protective coating on one blade than the other when refinishing a wood propeller...
May be necessary to achieve final balancing
Generally, a small crack just started in a cylinder baffle...
May be stop drilled
A change in engine manifold pressure has a direct effect on the...
Mean effective cylinder pressure
Which of the following functions requires the use of a propeller blade station?
Measuring blade angle
Which of the following functions requires the use of propeller blade station?
Measuring blade angle
From the following, identify the factor that has the least effect on the oil consumption of a specific engine.
Mechanical efficiency
On a light-sport aircraft with two carburetors, carburetor synchronization must be performed as follows:
Mechanical synchronization first, then pneumatic synchronization
The purpose of the fuel metering section of the Bendix/Percision fuel injection system is to...
Meter and control the fuel flow to the flow divider
Which of the following turbine fuel filters has the greatest filtering action of any present-day filter type?
Micron filter
When preparing a propeller blade for inspection it should be cleaned with...
Mild soap and water
The recommended aircraft engine lubricants are...
Mineral or synthetic based
The device that controls the ratio of the fuel/air mixture to the cylinders is called a...
Mixture control
What factor is not used in the operation of an aircraft gas turbine engine fuel control unit?
Mixture control position
If carburetor or induction system icing is not present when carburetor heat is applied with no change in the throttle setting, the...
Mixture will become richer
What is the primary purpose of the tachometer on an axial-compressor turbine engine?
Monitor engine RPM during starting and to indicate overspeed conditions
Which statement is true regarding the air passing through the combustion section of a jet engine?
Most is used for engine cooling
A unique manufacturing feature of the Jabiru light-sport engines is...
Most parts are machined from solid material
Which statement is correct about radial engine crankshafts?
Movable counterweights serve to reduce the dynamic vibrations in an aircraft reciprocating engine.
Which statement is correct regarding engine crankshafts?
Moveable counterweighs serve to reduce the torsional vibrations in an aircraft reciprocating engine
If the thermocouple leads were inadvertently crossed at installation, what would the cylinder temperature gauge pointer indicate?
Moves off-scale on the zero side of the meter
Which of the following types of combustion sections are used in aircraft turbine engines?
Multiple-can, annular, and can-annular
If, during inspection at engine overhaul, ball or roller bearings are found to magnetism but otherwise have no defects, they...
Must be degaussed before use
Maintenance and inspections on light-sport aircraft...
Must be recorded in the aircraft maintenance logbook.
Splicing of individual aircraft electrical wires...
Must be staggered so that the bundle does not become excessively large
In a convergent exhaust nozzle, the diameter of the outlet...
Must not be too large or energy will be wasted
In a dual axial-flow compressor, the first stage turbine drives...
N(2) compressor
In the dual axial-flow or twin spool compressor system, the first stage turbine drives the...
N(2) compressor
In the dual axial flow or twin spool compressor system, the first stage turbine drives the...
N2 compressor
When grinding a valve to an interference fit, a...
Narrow contact surface is created
On which part of the cylinder walls of a normally operating engine will the greatest amount of wear occur?
Near the top of the cylinder
1. Preignition is cause by improper ignition timing 2. Detonation occurs when an are of the combustion chamber becomes incandescent and ignites the fuel/air mixture in advance of normal timed ignition. Regarding the above statements,
Neither number 1 nor number 2 are true
1. Welding and straightening of turbine engine rotating airfoils does not require special equipment 2. Welding and straightening of turbine engine rotating airfoils is commonly recommended by the manufacturer Regarding the above statements,
Neither number 1 nor number 2 are true
The basic gas turbine engine is divided into two main sections: the cold section and the hot section. 1. The cold section includes the engine inlet, compressor, and turbine sections. 2. The hot section includes the combustor, diffuser, and exhaust sections. Regarding the above statements,
Neither number 1 nor number 2 are true
1. A mechanic certificate with a powerplant rating authorizes the holder to repair deep scars, nicks, and dents on aluminum propeller blades. 2. A mechanic certificate with a powerplant rating authorizes the holder perform minor straightening of steel propeller blades. Regarding the above statements,
Neither number 1 nor number 2 is true
After spark plugs from an opposed engine have been serviced, in what position should they be reinstalled?
Next in firing order to the one from which they were removed and swapped from bottom to top
Some cylinder barrels are hardened by...
Nitriding
What is the relationship between the accelerating pump and the enrichment valve in a pressure injection carburetor?
No relationship since they operate independently
Under which of the following conditions will the trimming of a turbine engine be most accurate?
No wind and low moisture
Where would a carburetor air heater be located in a fuel injection system?
None is required
Using a cold spark plug in a high-compression aircraft engine would probably result in...
Normal operation
A light sport aircraft engine...
Normally meets FAA or ASTM standards
After making a welded repair to a pressurized-type turbine engine oil tank, the tank should be pressure checked to...
Not less than 5 PSI plus the maximum operating pressure of the tank
Straightening nitride crankshafts is...
Not recommended
Straightening nitrided crankshafts is...
Not recommended
On an aircraft turbine engine, operating at a constant power, the application of engine anti-icing will result in...
Noticeable shift in EPR
What is the smallest terminal stud allowed for aircraft electrical power systems?
Number 10
The compression ratio of an axial flow compressor is a function of the...
Number of compressor stages
The compression ratio of an axial-flow compressor is a function of the...
Number of compressor stages
What is the primary factor which controls the pressure ratio of an axial-flow compressor?
Number of stages in compressor
The heat engine used predominantly in aviation is the...
O-type engine
Dislodged internal muffler baffles on a small reciprocating engine may...
Obstruct the muffler outlet and cause excessive exhaust back pressure
The EGT gauge used with reciprocating engines is primarily used to furnish temperature readings in order to...
Obtain the best mixture setting for fuel efficiency
The primary purpose in setting proper valve timing and overlap is to...
Obtain the best volumetric efficiency and lower cylinder operating temperatures
To prevent moisture from aiding in corroding engine cylinders when stored or shipped, spark plugs are remove and dehydrator plugs installed. When the dehydrator plugs are blue, it is an indication...
Of low humidity with corrosion unlikely
Excessive oil is prevented from accumulating on the cylinder walls of a reciprocating engine by...
Oil control rings on the pistons
Where is the oil of a dry sump reciprocating engine exposed to the temperature control valve sensing unit?
Oil cooler inlet
Where is the oil temperature bulb located on a dry sump reciprocating engine?
Oil inlet line
Inspection of pneumatic starters by maintenance technicians usually includes checking the...
Oil level and magnetic drain plug condition
Constant speed non-feathering McCauley, Hartzell, and other propellers of similar design without counterweights increase pitch angle using...
Oil pressure
Constant-speed non-feathering McCauley, Hartzell, and other propellers of similar design without counterweights increase pitch angle using...
Oil pressure
What unit in an aircraft engine lubrication system is adjusted to maintain the desired system pressure?
Oil pressure relief valve
What is likely to occur if a reciprocating engine is operated at high power settings before it is properly warmed up?
Oil starvation of bearings and other parts
What prevents pressure within the lubricating oil tank from rising above or falling below ambient pressure (reciprocating engine)?
Oil tank vent
In a jet engine which uses a fuel-oil heat exchanger, the oil temperature is controlled by a thermostatic valve that regulates the flow of...
Oil through the heat exchanger
The propeller governor controls the...
Oil to and from the pitch changing mechanism
What will result if an oil filter becomes completely blocked?
Oil will flow at the normal rate through the system
How may it be determined that a reciprocating engine with a dry sump is pre-oiled sufficiently?
Oil will flow from the engine return line or indicator port
Hot section inspections for many modern turbine engines are required...
On a time or cycle basis
In the aircraft magneto system, if the P-lead is disconnected, the magneto will be...
On regardless of ignition switch position
Why do helicopters require a minimum of two synchronous tachometer systems?
One indicates engine RPM and the other main rotor RPM
On a twin-engine aircraft with fuel-injected reciprocating engines, one fuel-flow indicator reads considerably higher than the other in all engine operating configurations. What is the probable cause of this indication?
One or more fuel nozzles clogged
A nine-cylinder radial engine, using a multiple-point priming system with a central spider, will prime which cylinders?
One, two, three, eight, and nine
As a general rule, starter brushes are replaced when they are approximately...
One-half their original length
As a general rule, starter brushes should be replaced when they are approximately...
One-half their original length
In reference to a shower of sparks ignition system, 1. The retard breaker points are designed to keep the affected ignition system operating if the advance breaker points should fail during normal engine operation (after start) 2. The timed opening of the retard breaker points is designed to prevent engine "kickback" during start Regarding the above statements...
Only Number 2 is true
In general, welding of engine parts is...
Only allowed when approved by the manufacturer
When using hand crimped wire terminals,
Only aluminum terminals should be used on aluminum wire
1. During takeoff, propeller thrust (pull) is greatest if the blade angle of attack is low and the engine power setting is high 2. With the aircraft stationary, propeller thrust is greatest if the blade angle of attack is high and the engine power setting is high Regarding the above statements,
Only number 1 is true
1. Electrical wires larger than 10 gauge use insulated terminals. 2. Electrical wires smaller than 10 gauge use uninsulated terminals. Regarding the above statements,
Only number 1 is true
1. Engine pressure ratio (EPR) is a ratio of the exhaust gas pressure to the engine inlet air pressure, and indicates the thrust produced. 2. Engine pressure ratio (EPR) is a ratio of the exhaust gas pressure to the engine inlet air pressure, and indicates the volumetric efficiency. Regarding the above statements,
Only number 1 is true
1. Most modern aircraft use circuit breakers rather than fuses to protect their electrical circuits. 2. Federal Aviation Regulations Part 23 requires that all electrical circuits incorporate some form of circuit protection device. Regarding the above statements,
Only number 1 is true
1. Serviceability limits for turbine blades are much more stringent than are those for turbine nozzle vanes. 2. A limited number of small nicks and dents can usually be permitted in any area of a turbine blade. Regarding the above statements,
Only number 1 is true
1. The platinum and iridium ground electrodes used on fine wire spark plugs are extremely brittle and can be broken if they are improperly handled or adjusted. 2. When gapping massive-electrode spark plugs, a wire gauge should be inserted between the center and ground electrodes while moving the ground electrode in order to avoid setting the gap too close. Regarding the above statements,
Only number 1 is true
1. Gas turbine and reciprocating and reciprocating engine oils can be mixed or used interchangeably. 2. Most gas turbine engine oils are synthetic. Regarding the above statements,
Only number 2 is true
1. Gas turbine and reciprocating engine oils can be mixed or used interchangeably. 2. Most gas turbine engine oils are synthetic. Regarding the above statements,
Only number 2 is true
1. Wet sump oil systems are most commonly used in gas turbine engines. 2. In most turbine engine oil tanks, a slight pressurization of the tank is desired to ensure a positive flow of oil. Regarding the above statements,
Only number 2 is true
The type of oil pump most commonly used on turbine powered engines are classified as...
Positive displacement
In reference to a 'Shower of Sparks' ignition system, (1) the retard breaker points are designed to keep the affected ignition system operating if the advance breaker points should fail during normal engine operation (after start). (2) The timed opening of the retard breaker points is designed to prevent engine 'kickback' during start. Regarding the above statements,
Only number 2 is true
When a 'Shower of Sparks' ignition system is activated at an engine start, a spark plug fires...
Only while both the retard and advance breaker points are open
When the switch is off in a battery ignition system, the primary circuit is...
Opened
What is the result of moving the throttle on a reciprocating engine when the propeller is in the constant-speed range with the engine developing cruise power?
Opening the throttle will cause an increase in blade angle
A booster coil on a radial engine...
Operates off of battery power and a trailing finger in the distributor
Which of the following factors helps determine the proper grade of oil to use in a particular engine?
Operating speeds of bearings
When the centrifugal force acting on the propeller governor flyweights overcomes the tension on the speeder spring, a propeller is in what speed condition?
Over-speed
When the leading edge of a first stage turbine blade is found to have stress rupture cracks, which of the following should be suspected?
Over-temperature condition
A continuous-loop fire detector is what type of detector?
Overheat detector
When the leading edge of a first-stage turbine blade is found to have stress rupture cracks, which of the following should be suspected?
Overtemperature condition
A typical barrier type aircraft terminal strip is made of...
Paper-base phenolic compound
A magneto ignition switch is connected...
Parallel to the breaker points
Generally, unless otherwise specified by the manufacturer, repairs of nicks, scratches, gouges, etc. on aluminum propeller blades must be made...
Parallel to the length of the blade
Which of the following results in a decrease in volumetric efficiency?
Part-throttle operation
To determine the float level in a float-type carburetor, a measurement is usually made from the top of the fuel in the float chamber to the...
Parting surface of the carburetor
In what units are turbine engine tachometers calibrated?
Percentage of engine RPM
Why is it unnecessary to flash the field of the exciter on a brushless alternator?
Permanent magnets are installed in the main field poles
What could be a result of undetected exhaust system leaks in a reciprocating engine powered airplane?
Pilot/passenger incapacitation caused by carbon monoxide entering the cabin
In order to reduce the possibility of ground shorting the circuits when the connectors are separated for maintenance, the AN and MA electrical connectors should be installed with the...
Pin section on the ground side of the electrical circuit
When installing a magneto on an engine, the...
Piston in the Number 1 cylinder must be a prescribed number of degrees before top center on the compression stroke
If air is heard coming from the crankcase breather or oil filler during a differential compression check, what is this an indication of?
Piston ring leakage
What is the source of most of the heat that is absorbed by the lubricating oil in a reciprocating engine?
Pistons and cylinder walls
A fixed-pitch wooden propeller that has been properly installed and the attachment bolts properly torqued exceeds the out-of-track allowance by 1/16 inch. The excessive out-of-track condition may be corrected by...
Placing shims between the inner flange and the propeller
Master rod bearings are generally what type of bearing?
Plain
Master rod bearings are generally what type?
Plain
Which of the following bearing types must be continuously lubricated by pressure oil?
Plain
What could cause excessive pressure buildup in the crankcase of a reciprocating engine?
Plugged crankcase breather
Generally, when maximum APU shaft output power is being used in conjunction with pneumatic power...
Pneumatic loading will be automatically modulated to maintain a safe EGT
Manually feathering a hydromechanical propeller means to...
Port governor oil pressure from the cylinder of the propeller
The primary purpose of the front and rear cones for propellers that are installed on splined shafts is to...
Position the propeller hub on the splined shaft
When an engine with a subsonic divergent type inlet duct is running in place at high speed on the ground, the air pressure within the inlet is...
Positive
A carburetor air pre-heater is not generally used on takeoff unless absolutely necessary because of the...
Possibility of induction system overboost
A significant pilot controlled input into the EFCU for controlling fuel metering is the...
Power lever angle through a pedestal mounted potentiometer
A method commonly used to prevent carburetor icing is to...
Preheat the intake air
What will be the result of using too hot a spark plug?
Preignition
Grinding the valves of a reciprocating engine to a feather edge is likely to result in...
Preignition and burned valves
Grinding the valves of a reciprocating engine to a feathered edge is likely to result in...
Preignition and burned valves
A divided-entrance inlet air duct on a turbine powered aircraft...
Presents difficulty to designers due to the amount of drag produced
In a gas turbine engine, combustion occurs at a constant...
Pressure
The Brayton cycle is know as the constant...
Pressure cycle
In a reciprocating engine, oil is directed from the pressure relief valve to the inlet side of the...
Pressure pump
An advantage of the centrifugal-flow compressor is its high...
Pressure rise per stage
The valve assemblies of opposed reciprocating engines are lubricated by means of a...
Pressure system
Engine oil lubricating systems on aircraft reciprocating engines are...
Pressure type or a combination of pressure and splash type
On many turbine powered aircraft, the start valve works in conjunction with what other valve to supply the correct flow of air to the pneumatic starter?
Pressure-regulating and shutoff valve
What are the positions of the pressurization valve and the dump valve in a jet engine fuel system when the engine is shut down?
Pressurization valve closed, dump valve open
A complete break in the line between the manifold pressure gauge and the induction system will be indicated by the gauge registering...
Prevailing atmospheric pressure
The function of the altitude compensating, or aneroid valve used with the Teledyne-Continental fuel injection system on many turbocharged engines is to...
Prevent an overly rich mixture during sudden acceleration
Is it necessary to control acceleration and deceleration rates in turbine engines in order to...
Prevent blowout or die-out
It is necessary to control acceleration and deceleration rates in turbine engines in order to...
Prevent blowout or die-out
Compressor field cleaning on turbine engines is performed primarily in order to...
Prevent engine performance degradation, increased fuel costs, and damage or corrosion to gas path surfaces
Shielding is used on spark plug and ignition wires to...
Prevent interference with radio reception
The purpose of a relief valve installed in the tank venting system of a turbine engine oil tank is to...
Prevent oil pump cavitation by maintaining a constant pressure on the oil pump inlet
Manufacturers normally require turbine engine oil servicing within a short time after engine shutdown primarily to...
Prevent overservicing
Aircraft copper electrical wire is coated with tin, silver, or nickel in order to...
Prevent oxidation
It is desirable that fuel lines have a gentle slope upward or downward and not have sharp curves or sharp rises and/or falls in order to...
Prevent vapor lock
The secondary coil of a magneto is grounded through the...
Primary Coil
The spark occurs at the spark plug when the ignition's...
Primary circuit is broken
An aircraft engine equipped with a pressure-type carburetor is started with the...
Primer while the mixture control is positioned at IDLE CUTOFF
Reverse pitch propellers...
Produce a negative blade angle to slow the aircraft after touchdown
Which of the following fire detectors are commonly used in the power section of engine nacelles?
Rate-of-temperature-rise detectors
The main engine-driven fuel pump on a turbine engine...
Produces adequate capacity at all operating conditions and has excess capacity over most of the range of operation
Which of the following contains a table that lists the engines to which a given propeller is adaptable?
Propeller Type Certificate Data Sheets
On most reciprocating multiengine aircraft, automatic propeller synchronization is accomplished through the actuation of the...
Propeller governors
Which of the following determines oil and grease specifications for lubrication of propellers?
Propeller manufacturers
The purpose of a safety gap in a magneto is to...
Protect the high-voltage winding from damage
Cam ground pistons are installed in some aircraft engines to...
Provide a better fit at operating temperatures
Cam-ground pistons are installed in some aircraft engines to...
Provide a better fit at operating temperatures
Some larger reciprocating engines use a compensating oil pressure relief valve to...
Provide a high engine oil pressure when the oil is cold and automatically lower the oil pressure when the oil warms up
Bonding jumpers should be designed and installed in such a manner that they...
Provide a low electrical resistance in the ground circuit
Iridium and platinum fine wire electrode spark plugs...
Provide a more intense spark but cost more than massive electrode plugs
Boost pumps in a fuel system...
Provide a positive flow of fuel to the engine pump
On a float-type carburetor, the purpose of the economizer valve is to...
Provide a richer mixture and cooling at maximum power output
Some aircraft engine manufacturers equip their product with choked or taper-ground cylinders in order to...
Provide a straight cylinder bore at operating temperatures
The purpose of the engine inlet on a turbine engine is to...
Provide a uniform and steady airflow to avoid compressor stall
The oil dampened also known as hydraulic main bearing utilized in some turbine engines is used to...
Provide an oil film between the outer race and the bearing housing in order to reduce vibration tendencies in the rotor system, and to allow for slight misalignment
The oil dampened main bearing utilized in some turbine engines is used to...
Provide an oil film between the outer race and the bearing housing in order to reduce vibration tendencies in the rotor system, and to allow for slight misalignment
On APU's equipped with a free turbine and load compressor, the primary function of the load is to...
Provide bleed air for aircraft pneumatic systems
Aircraft magneto housings are usually ventilated in order to...
Provide cooling and remove corrosive gases produced by normal arcing
The primary concern in establishing the firing order for an opposed engine is to...
Provide for balance and eliminate vibration to the greatest extent possible
The undersides of pistons are frequently finned. The principal reason is to...
Provide for greater heat transfer to the engine oil
The purpose of directing bleed air to the outer turbine case on some engines is to...
Provide optimum turbine blade tip clearance by controlling thermal expansion
What is the primary purpose of the oil breather pressurization system that is used on turbine engines?
Provides a proper oil spray pattern from the main bearing oil jets
What are the principal advantages of the duplex fuel nozzle used in many turbine engines?
Provides better atomization and uniform flow pattern
In addition to its primary purpose of confining a potential fire to engine compartment, the engine firewall also...
Provides mounting surfaces for the engine and accessories
Checking the valve seat to valve face fit can be done with...
Prussian blue or by gently lapping the valve to the seat and examining the valve seat afterwards
Some engine manufacturers of twin spool gas turbine engines identify turbine discharge pressure in their maintenance manuals as...
Pt7
An engine lubrication system pressure relief valve is usually located between the...
Pump and the internal oil system
Valve clearance changes an opposed-type engines using hydraulic lifters are accomplished by...
Push rod replacement
Pneumatic starters are usually designed with what types of airflow impingement systems?
Radial inward flow turbine and axial-flow turbine
An engine's thrust output temporarily decreases as aircraft speed increases from static. This overcome at higher speeds by...
Ram air effect
The amount of voltage generated in any magneto secondary coil is determined by the number of windings and by the...
Rate of collapse of the magnetic field around the primary coil
Which of the following fire detectors are commonly used in the power section of an engine nacelle
Rate-of-temperature-rise detectors
How does the high tension ignition shielding tend to reduce radio interference?
Receives and grounds high frequency waves coming from the magneto and high-tension ignition leads
How does the high-tension ignition shielding tend to reduce radio interference?
Receives and grounds high-frequency waves coming from the magneto and high-tension ignition leads
The part of a DC alternator power system that prevents reverse flow of current from the battery to the alternator is the...
Rectifier
What is the basic operational sequence for reducing the power output of an engine equipped with a constant-speed propeller?
Reduce the manifold pressure, then the RPM
The centrifugal twisting force of an operating propeller tends to...
Reduce the pitch angle
The centrifugal twisting movement of an operating propeller tends to...
Reduce the pitch angle
A purpose of the shrouds on the turbine blades of an axial-flow engine is to...
Reduce vibration
If a blade of a particular metal propeller is shortened because of damage to the tip, the remaining blade(s) must be...
Reduced to conform with the shortened blade
What is an advantage of using metallic sodium filled exhaust valves in aircraft reciprocating engines?
Reduced valve operating temperature
What is the advantage of using metallic-sodium filled exhaust valves in aircraft reciprocating engines?
Reduced valve operating temperatures
Which of the following will be caused by excessive valve clearance of a cylinder on a reciprocating aircraft engine?
Reduced valve overlap period
The differential pressure controller in a turbocharger system...
Reduces bootstrapping during part-throttle operation
Which of the following is NOT a function of the carburetor venturi?
Regulates the idle system
Which of the following best describes the function of altitude mixture control?
Regulates the richness of the fuel/air charge entering the engine
Which of the following best describes the function of an altitude mixture control?
Regulates the richness of the fuel/air charge entering the engine
The purpose of the back-suction mixture control in a float-type carburetor is to adjust the mixture by...
Regulating the pressure on the fuel in the float chamber
The angle of attack of a rotating propeller blade is measured between the blade chord or face and which of the following?
Relative Airstream
The angle-of-attack of a rotating propeller blade is measured between the blade chord or face and which of the following?
Relative airstream
In order to relieve excess pump pressure in an engine's internal oil system, most engines are equipped with a...
Relief valve
In order to relieve excessive pump pressure in an engine's internal oil system, most engines are equipped with a...
Relief valve
Fuel pressure produced by the engine-driven fuel pump is adjusted by the...
Relief valve adjusting screw
An EEC (Electronic Engine Control) in a FADEC (Full Authority Digital Engine Control) aircraft...
Relies on crosstalk between channels for the best engine control output
As the generator load is increased (within its rated capacity), the voltage will...
Remain constant and the amperage output will increase
During engine operation at speeds lower than those for which the constant speed propeller control can govern in the INCREASE RPM position, the propeller will...
Remain in the full LOW PITCH position
When in operation, the speed of an APU...
Remains at or near rated speed regardless of the load condition
In order to maintain a constant oil pressure as the clearances between the moving parts of an engine increase through normal wear, the supply pump output...
Remains relatively constant (at a given RPM) with less oil being returned to the pump inlet by the relief valve
The purpose of an engine/inlet anti-ice system is primarily to...
Remove ice formation in engine and/or inlet areas
When lubricating a Hartzell propeller blade with grease, to prevent damage to blade seals, the service manual may recommend on some models to...
Remove one of the two zerk fittings for the blade and grease the blade through the remaining fitting
When lubricating a Hartzell propeller blade with grease, to prevent damage to the blade seals, the service manual may recommend on some models to...
Remove one of the two zerk fittings for the blade and grease the blade through the remaining fitting
Cracks in cooling fins that do not extend into the cylinder head may be repaired by...
Removing affected area and contour filing within limits
What corrective action should be taken when a carburetor is found to be leaking fuel from the discharge nozzle?
Replace the needle valve and seat
The wire identification code of aircraft wire is...
The choice of the manufacturer
After a turbofan engine has been replaced, it must be trimmed. What other actions or conditions mandate that a turbofan engine be re-trimmed?
Replacement of fuel control, engine not developing maximum thrust, or excessive throttle stagger
Valve clearance changes on opposed-type engines using hydraulic lifters are accomplished by...
Replacing the push rod
Cold straightening of a bent aluminum propeller blade...
Requires specialized tooling and precision measuring equipment
Automatic reset circuit breakers...
Reset themselves periodically and hsould not be used on aircraft
The viscosity of a liquid is a measure of its...
Resistance to flow
The reason for flashing the field in a generator is to...
Restore correct polarity and/or residual magnetism to the field poles
What is the proper operating sequence when using thrust reversers to slow an aircraft after landing?
Retard thrust levers to ground idle, raise thrust reverser levers are required, and retard thrust reverser levers to ground idle
What must be done after the fuel control unit has been replaced on an aircraft gas turbine engine?
Retrim the engine
What assists the starter jaw in retracting after the starter motor is disengaged on a typical direct cranking reciprocating engine starter?
Return spring
What unit in the propeller anti-icing system controls the output of the pump?
Rheostat
An aircraft carburetor is equipped with a mixture control in order to prevent the mixture from becoming too...
Rich at high altitudes
If the main air bleed of a float-type carburetor becomes clogged, the engine will run...
Rich at rated power
If an aircraft engine is equipped with a carburetor that is not compensated for altitude and temperature variations, the fuel/air mixture will become...
Richer as either the altitude or temperature increases
A punctured float in a float-type carburetor will cause the fuel level to...
Rise, and enrich the mixture
Most large aircraft reciprocating engines are equipped with which of the following types of engine-driven fuel pumps?
Rotary-vane-type fuel pump
When performing a compression check, if low compression is obtained on a cylinder,
Rotate the engine with the starter or restart and run the engine and check the compression again
What component of a dual magneto is shared by both ignition systems?
Rotating magnet
What components make up the magnetic system of a magneto?
Rotating magnet, the pole shoes, the pole shoe extensions, and the coil core
Which components make up the magnetic system of a magneto?
Rotating magnet, the pole shoes, the pole shoe extensions, and the coil core
Which two elements make up the axial-flow compressor assembly?
Rotor and stator
Engine operating flexibility is the ability of the engine to...
Run smoothly and give the desired performance at all speeds
In a low-tension ignition system, each spark plug requires an individual...
Secondary coil
In a low-tension ignition system, each spark plug requires and individual...
Secondary coil
In a turbine engine with a dual-spool compressor, the low speed compressor...
Seeks its own best operating speed
What type igniter plug is used in the low tension ignition system of an aircraft turbofan engine?
Self-ionizing or shunted-gap type
The purpose of a dwell chamber in a turbine engine oil tank is to provide...
Separation of entrained air from scavenged oil
Electric motors are often classified according to the method of connecting the field coils and armature. Aircraft engine starter motors are generally of which type?
Series
Turbine engine lubrication system maintenance intervals are...
Set by the manufacturer
When trimming a turbine engine, the fuel control is adjusted to...
Set idle RPM and maximum speed or EPR
Most engine-propeller combinations have one or more critical ranges within which continuous operation is not permitted. Critical ranges are established to avoid...
Severe propeller rotation
Repairs of aluminum alloy adjustable pitch propellers are not permitted to be made on which of the following propeller blade areas?
Shank
What method(s) is/are used to provide clean air to the engines of helicopters and turboprop airplanes that have particle (sand and ice) separators installed?
Sharp airflow directional change to take advantage of inertia and/or centrifugal force, and filters or engine inlet screens
A characteristic of dyna-focal engine mounts as applied to aircraft reciprocating engines is that the...
Shock mounts point toward the engine's center of gravity
A characteristic of Dyna-focal engine mounts as applied to aircraft reciprocating engines is that the...
Shock mounts point towards the engines center of gravity
When is the fuel/air mixture ignited in a conventional reciprocating engine?
Shortly before the piston reaches the top of the compression stroke
Terminal lugs...
Should be installed so they are locked against movement in the direction of loosening
A bent cooling fin on an aluminum cylinder head...
Should be left alone if no crack has formed
Low oil pressure can be detrimental to the internal engine components. However, high oil pressure...
Should be limited to the manufacturer's reccomendations
The blending of blades and vane in a turbine engine...
Should be performed parallel to the length of the blade using smooth contours to minimize stress points
The blending of blades and vanes in a turbine engine...
Should be performed parallel to the length of the blade using smooth contours to minimize stress points
Reduced blade vibration and improved airflow characteristics in gas turbines are brought about by...
Shrouded turbine rotor blades
Reduced blade vibration and improved airflow...
Shrouded turbine rotor blades
How many reciprocating engine exhaust system leaks be detected?
Signs of exhaust soot inside cowling and on adjacent components
How may reciprocating engine exhaust leaks be detected?
Signs of exhaust soot inside the cowling and on adjacent componenets
In addition to causing accelerated wear, dust or sand ingested by a reciprocating engine may also cause...
Silicon fouling of spark plugs
The two types of centrifugal compressor impellers are...
Single entry and double entry
If the ignition switch is moved from BOTH to either LEFT or RIGHT during an engine ground check, normal operation is usually indicated by a...
Slight drop in RPM
The fuel level within the float chamber of a properly adjusted float-type carburetor will be...
Slightly lower than the discharge nozzle outlet
Which of the following is NOT used to detect fires in reciprocating engine nacelles?
Smoke detectors
Why does one type of Fenwal fire detection system use spot detectors wired in parallel between two separate circuits?
So that a single fault may exist in the system without sending a false alarm
The temperature of turbine engine fuel is often kept above 32 degrees Fahrenheit...
So that ice crystals do no form in the filter and block fuel flow
Why is a constant-speed drive used to control the speed of some aircraft engine-driven generators?
So that the frequency of the alternating current output will remain constant
ON-OFF two position engine electrical switches should be installed...
So the ON position is reached by a forward or upward motion
What type of lubricant may be used to aid in pulling electrical wires or cables through conduits?
Soapstone talc
When a magneto is disassembled, keepers are usually placed across the poles of the rotating magnet to reduce the loss of magnetism. These keepers are usually made of...
Soft iron
The engine mounts on a turbofan engine...
Solate the aircraft structure from adverse engine vibration
Which of the following is used to correct horizontal unbalance of a wood propeller?
Solder
Great caution should be exercised in handling damaged hermetically sealed turbine engine igniter transformer units because...
Some certain radioactive material
When cleaning aluminum and magnesium engine parts, it is inadvisable to soak them in solutions containing soap because...
Some of the soap will become impregnated in the surface of the material and subsequently cause engine oil contamination and foaming
One of the best indicators of reciprocating engine combustion chamber problems is...
Spark plug condition
Oil leakage around the rear cone of a hydromatic propeller usually indicates a defective...
Spider-shaft oil seal
Cylinder walls are usually lubricated by...
Splashed or sprayed oil
Which turbine engine compressor offers the greatest advantages for both starting flexibility and improved high-altitude performance?
Split-spool, axial-flow
How is the fire extinguishing agent distributed in the engine section?
Spray nozzles and perforated tubing
How is the fire-extinguishing agent distributed in the engine section?
Spray nozzles and perforated tubing
The function of an APU air inlet plenum is to...
Stabilize the pressure of the air before it enters the compressor
A term commonly used when two or more electrical terminals are installed on a single lug of a terminal strip is...
Stacking
Which of the following aircraft circuits does not contain a fuse/circuit breaker?
Starter circuit
When the starter switch to the aircraft gas turbine engine starter-generator is energized and the engine fails to rotate, one of the probable causes would be the...
Starter solenoid is defective
What is the proper starting sequence for a turbojet engine?
Starter, ignition, fuel
What is the proper starting sequence of a turbojet engine?
Starter, ignition, fuel
What are the two basic elements of the turbine section in a turbine engine?
Stator and rotor
A safety feature usually employed in direct-cranking starters that is used to prevent the starter from reaching burst speed is the...
Stator nozzle design that chokes airflow and stabilizes turbine wheel speed
The non-rotating axial-flow compressor airfoils in an aircraft gas turbine engine, are called...
Stator vanes
Between each row of rotating blades in a turbine engine compressor, there is a row of stationary blades which at to diffuse the air. These stationary blades are called...
Stators
When overhauling a certified reciprocating aircraft engine...
Steel valve seats can be wet or dry grinded
What type of oil do most engine manufacturer's recommend for new reciprocating engine break-in?
Straight mineral oil
What type of oil do most engine manufacturers recommend for new reciprocating engine break-in?
Straight mineral oil
The function of the exhaust cone assembly of a turbine engine is to...
Straighten and collect the exhaust gases into a solid exhaust jet
In an axial-flow compressor, one purpose of the stator vanes at the discharge end of the compressor is to...
Straighten the airflow and eliminate turbulence
The most effective method of regulating aircraft direct current generator output is to vary, according to the load requirements, the...
Strength of the stationary field
When aircraft turbine blades are subjected to excessive heat stress, what type of failures would you expect?
Stress rupture
The resistance of the current return path through the aircraft is always considered negligible, provided the...
Structure is adequately bonded
What is the major function of the turbine assembly in a turbojet engine?
Supplies the power to turn the compressor
The primary function of the compressor on a gas turbine engine is to...
Supply air in sufficient quantity for combustion
If the oil cooler core and annular jacket becomes congealed, what unit prevents damage to the cooler?
Surge protection valve
If the oil in the oil cooler core and annular jacket becomes congealed, what unit prevents damage to the cooler?
Surge protection valve
Which of the following types of electric motors are commonly used in electric tachometers?
Synchronous motors
In an airplane equipped with an alternate air system, if the main air duct air filter becomes blocked or clogged, the...
System will automatically allow warm, unfiltered air to be drawn into the engine
On an airplane equipped with an alternate air door in the carburetor air box, when the main air duct air filter becomes blocked or clogged, the...
System will automatically allow warm, unfiltered air to be drawn into the engine through a spring loaded alternate air valve
Which of the following is a primary engine instrument?
Tachometer
A fuel strainer or filter must be located between the...
Tank outlet and the fuel metering device
When tightening the exhaust system clamps,
Tapping the clamps with a rawhide mallet prevents binding
Which of the following has the greatest effect on the viscosity of lubricating oil?
Temperature
What is the purpose of the carburetor accelerating system?
Temporarily enrich the mixture when the throttle is suddenly opened
Once an engine has been installed satisfactorily, the propeller can be installed. It should be...
Tested before, during, and after the engine has been ground operated
Where would one find type design information for an R1830-92 engine certificated under the Civil Air Regulations (CAR) and installed on a DC-3?
The Aircraft Engine Specifications
Which of the following fire detection systems will detect a fire when an element is inoperative but will not test when the test circuit is energized?
The Kidde System and the Fenwal system
Fuel is normally supplied to an APU from...
The airplane's main fuel supply
Into what part of a reciprocating engine induction system is deicing alcohol normally injected?
The airstream ahead of the carburetor
What will occur if the vapor vent float in a pressure carburetor looses its buoyancy?
The amount of fuel returning to the fuel tank from the carburetor will be increased
What will occur if the vapor vent float in a pressure carburetor loses its buoyancy?
The amount of fuel returning to the fuel tank from the carburetor will be increased
Which of the following types of heat exchangers is used to regulate the fuel temperature?
The bleed air type is called an air-to-liquid exchanger and the oil type is known as a liquid-to-liquid heat exchanger
Usually, most of the load placed on an APU occurs when...
The bleed air valve is opened
In a high-tension ignition system, a primary capacitor of too low a capacity will cause...
The breaker contacts to burn
When a magneto is operating, what is the probable cause for a shift in internal timing?
The cam follower wear and/or breaker points wear
If metallic particles are found in the oil filter during an inspection,
The cause should be identified and corrected before the aircraft is released for flight
Which of the following statements concerning a centrifugal-type fuel boost pump located in a fuel supply tank is NOT true?
The centrifugal-type pump is classified as a positive displacement pump
An external supercharger or turbosupercharger, also known as a turbocharger is composed of three main parts. They are...
The compressor assembly, the turbine wheel assembly, and a full floating shaft bearing assembly
The diffuser section of a jet engine is located between...
The compressor section and the burner section
A certain direct current series motor mounted within an aircraft draws more amperes during start than when it is running under its rated load. The most logical conclusion that may be drawn is...
The condition is normal for this type of motor
The constrained-gap igniter plug used in some gas turbine engines operates at a cooler temperature because...
The construction is such that the spark occurs beyond the face of the combustion chamber liner
A high surge of current is required when a DC electric motor is first started. As the speed of the motor increases,
The counter emf builds up and opposes the applied emf, thus reducing the current flow through the armature
What is the relationship between distributor and crankshaft speed of aircraft reciprocating engines?
The distributor turns at one-half crankshaft speed
What is the relationship between the distributor and crankshaft speed of aircraft reciprocating engines?
The distributor turns at one-half crankshaft speed
Who establishes the mandatory replacement times for critical components of turbine engines?
The engine manufacturer
Who establishes the recommended operating time between overhauls (TBO) of a turbine engine used in general aviation?
The engine manufacturer
On a typical Pratt and Whitney PT-6 turboprop engine, oil for the propeller governor is supplied by...
The engine oil supply
When preparing to place an engine in temporary or indefinite storage...
The engine should be operated to normal operating temperature with corrosion-preventative mixture oil for at least one hour
The low pitch stop on a constant-speed propeller is usually set so that...
The engine will turn at its rated takeoff RPM at sea level when the throttle is opened to allowable takeoff manifold pressure
What occurs when a back-suction type mixture control is placed in IDLE CUTOFF?
The float chamber will be vented to a negative pressure area
Which of the following occurs to cause front cone bottoming during propeller installation?
The front cone contacts the ends of the shaft splines, preventing the front and rear cones from being tightened against the cone seats in the propeller hub
What is the purpose of the dump valve used on aircraft gas turbine engines?
The fuel is quickly cut off to the nozzles and the manifolds are drained preventing fuel boiling off as a result of residual engine heat
Why are turbine engine igniters less susceptible to fouling than reciprocating engine spark plugs?
The high intensity spark cleans the igniter
Most exhaust system failures result from thermal fatigue cracking in the areas of stress concentration. This condition is usually caused by...
The high temperatures at which the exhaust system operates
Where are the hot and cold junctions located in an engine cylinder temperature indicating system?
The hot junction is located at the cylinder and the cold junction is located at the instrument
Which statement is correct regarding a four-stroke cycle aircraft engine?
The intake valve closes on the compression stroke
When a 28 volt, 75 ampere generator is installed on an aircraft, an electrical load analysis ground check is performed and it is determined that the battery is furnishing 57 amperes to the system, with all electrical equipment operating. This indicates...
The load will be within the generator load limit
Select the correct statement concerning the idle system of a conventional float-type carburetor...
The low pressure between the edges of the throttle valve and the throttle body pulls the fuel from the idle passage
When internally timing a magneto, the breaker points begin to open when...
The magnet poles are a few degrees beyond the neutral position
A red triangle, dot, or diamond mark on an engine instrument face or glass indicates...
The maximum limit for high transients such as starting
What controls the constant-speed range of a constant-speed propeller?
The mechanical limits in the propeller pitch range
Which statement pertaining to fuel/air ratios is true?
The mixture ratio which gives the best power is richer than the mixture ratio which gives maximum economy
Which statement relating to fuel/air ratios is true?
The mixture ratio which gives the best power is richer than the mixture ratio which gives maximum economy
The application of carburetor heat will have which of the following effects?
The mixture will become richer
What is the primary purpose of changing aircraft engine lubricating oils at predetermined periods?
The oil becomes contaminated with moistures, acids, and finely divided suspended solid particles
When installing a new engine after internal failure of the previous engine, many engine accessories may need to be removed and cleaned. Other components may require replacement, such as...
The oil cooler and propeller governor
What will be the result of operating an engine in extremely high temperatures using a lubricant recommended by the manufacturer for a much lower temperature?
The oil pressure will be lower than normal
The vent line connecting the oil supply tank and the engine in some dry sump engine installations permits...
The oil tank to be vented through the normal engine vent
Who may perform an annual condition inspection on a light sport aircraft?
The owner of the light sport aircraft who has completed the FAA approved training course for the aircraft in question
A clicking sound heard at engine coast-down in a pneumatic starter incorporating a sprag clutch ratchet assembly is an indication of...
The pawls re-contacting and riding on the ratchet gear
Full-floating piston pins are those which allow motion between the pin and...
The piston and the small end of the connecting rod
As the pressure is applied during a reciprocating engine compression check using a differential pressure tester, what would a movement of the propeller in the direction of engine rotation indicate?
The piston was positioned past top dead center
The pitch-changing mechanism of the hydromatic propeller is lubricated by...
The pitch-changing oil
The propeller blade angle is defined as the acute angle between the airfoil section chord line (at the blade reference station) and which of the following?
The plane of rotation
What would be the result if a magneto breaker point mainspring did not have sufficient tension?
The points will float or bounce
What would be the result if a magneto breaker point mainspring did not sufficient tension?
The points will float or bounce
Propeller blade tracking is the process of determining...
The positions of the tips of the propeller blades relative to each other
Why does the smoothness of operation of an engine increase with a greater number of cylinders?
The power impulses are spaced closer together
The primary condition(s) that allow(s) microorganisms to grow in the fuel in aircraft fuel tanks is (are)...
The presence of water
What is the relationship between the pressure existing within the throat of a venturi and the velocity of the air passing through the venturi?
The pressure is inversely proportional to the velocity
When the ignition switch of a single (reciprocating) engine aircraft is turned to the OFF position,
The primary circuits of both magnetos are grounded
If a flanged propeller shaft has dowel pins...
The propeller can be installed in only one position
If propeller cones or hub cone seats show evidence of galling and wear, the most likely cause is...
The propeller retaining nut was not tight enough during previous operation
What will happen to the return oil if the oil line between the scavenger pump and the oil cooler separates?
The return oil will be pumped overboard
Jet engine turbine blades removed for detailed inspection must be reinstalled in...
The same slot
The oil temperature regulator is usually located between which of the following on a dry sump reciprocating engine?
The scavenge pump outlet and the oil storage tank
The engine oil temperature regulator is usually located between which of the following on a dry sump reciprocating engine?
The scavenger pump outlet and the oil storage tank
At what RPM is a reciprocating engine ignition switch check made?
The slowest possible RPM
What determines the minimum particle size which will be excluded or filtered by a cuno-type (stacked disc, edge filtration) filter?
The spacer thickness
Upon what does the output frequency of an AC generator (alternator) depend?
The speed of rotation and the number of field poles
In the event a pneumatic start valve will not operate and the manual override must be used, the starter T-handle must be closed at scheduled start drop out because...
The starter will overspeed at a give N^2
In the event a pneumatic start valve will not operate and the manual override must be used, the starter T-handle must be closed at scheduled starter drop out because...
The starter will overspeed at a given N^2
Capacitance afterfiring of a spark plug is caused by...
The stored energy in the ignition shielded lead unloading after normal timed igntion
Which of the following is regulated in a generator to control its voltage output?
The strength of the field
Which statement is correct regarding the ignition system of a turbine engine?
The system is normally de-energized as soon as the engine starts
Which of the following fire detection systems uses heat in the normal testing of the system?
The thermocouple system and the Lindberg system
If all other requirements can be met, what type of oil should be used to achieve theoretically perfect engine lubrication?
The thinnest oil that will stay in place and maintain a reasonable film strength
What unit in a tachometer system sends information to the indicator?
The three-phase ac generator
Which statement is true regarding proper throttle rigging of an airplane?
The throttle stop on the carburetor must be contacted before the stop in the cockpit
You are performing a 100-hour inspection on an R985-22 aircraft engine. What does the '985' indicate?
The total piston displacement of the engine
You are performing a 100-hour inspection on an R985-22 aircraft engine. What does the 985 indicate?
The total piston displacement of the engine
The abbreviation Pt7 is used in turbine engine terminology means...
The total pressure at station No. 7
The abbreviation Pt7 used in turbine engine terminology means...
The total pressure at station No. 7
Generally, when removing a turbine engine igniter plug, in order to eliminate the possibility of the technician receiving a lethal shock, the ignition switch is turned off and...
The transformer-exciter input lead is disconnected and a prescribed amount of time is waited before the igniter lead is disconnected from the plug
What is meant by a shrouded turbine?
The turbine blades are shaped so that their ends forma band or shroud
Which of the following is most likely to occur if an overhead valve engine is operated with inadequate valve clearances?
The valves will not seat positively during start and engine warmup
Which statement is true regarding a thermocouple-type cylinder head temperature measuring system?
The voltage output of a thermocouple system is determined by the temperature difference between two ends of the thermocouple
For fire detection and extinguishing purposes, aircraft powerplant areas are divided into fire zones based on...
The volume and smoothness of the airflow through engine compartments
The compression ratio of an engine is equal to...
The volume of the cylinder with the piston at BDC divided by the volume of the cylinder at TDC
Select a characteristic of a good weld on exhaust stacks.
The weld should taper off smoothly into the base metal
Float-type carburetors which are equipped with economizers are normally set for...
Their leanest practical mixture delivery at cruising speeds and enriched by means of the economizer system at high power settings
Which statement is true regarding bearings used in high-powered reciprocating aircraft engines?
There is less rolling friction when ball bearings are used than when roller bearings are employed
Which of the following fire detection systems measure temperature rise compared to a reference temperature?
Thermocouple
Which of the following fire detection systems measures temperature rise compared to a reference temperature?
Thermocouple
Cylinder head temperatures are measured by means of an indicator and a...
Thermocouple sensing device
A fire detection system that operates on the rate-of-temperature rise is a...
Thermocouple system
The HKS 700T, the Jabiru 2200, and 3300 all share what common feature?
They are four stroke engines
How many basic types of circuit breakers are used in powerplant installation electrical systems?
Three
In addition to fuel quantity, a computerized fuel system (CFS) with a totalizer-indicator provides indication of how many of the following? 1. Fuel flow rate 2. Fuel used since reset or initial start-up 3. Fuel time remaining at current power setting 4. Fuel temperature
Three
What are two types of AC motors that are used to produce a relatively high torque?
Three-phase induction and capacitor start
The device that controls the volume of the fuel/air mixture to the cylinders is called a...
Throttle valve
How is oil collected by the piston oil ring returned to the crankcase?
Through holes drilled in the piston oil ring groove
How is the oil collected by the piston oil ring returned to the crankcase?
Through holes drilled in the piston oil ring groove
What operation force tends to bend the propeller blades forward at the tips?
Thrust bending force
The type of horsepower that determines the performance of the engine - propeller combination is...
Thrust horsepower
What operational force tends to bend the propeller blades forward at the tip?
Thrust-bending force
What tool is generally used to measure the crankshaft rotation in degrees?
Timing disk
What is the function of the fire detection systems?
To activate a warning device in the event of a powerplant fire
What is the purpose of an augmenter used in some reciprocating engine exhaust systems?
To aid in cooling the engine
What is the basic purpose of the three small holes (No. 60 drill) in the tipping of wood propeller blades?
To allow the moisture which may collect between the tipping and the wood to escape (vent the tipping)
The function of the automatic mixture control on a pressure injection carburetor is...
To compensate for changes in air density due to temperature and altitude changes
What is a function of the automatic propeller synchronizing system on multiengine aircraft?
To control engine RPM and reduce vibration
What is the function of the automatic propeller synchronizing system on multiengine aircraft
To control engine RPM and reduce vibration
What is the purpose of a power check on a reciprocating aircraft engine?
To determine satisfactory performance
What is the purpose of a power check on a reciprocating engine?
To determine satisfactory performance
What is the purpose of a safety gap in some magnetos?
To discharge the secondary coil's voltage if an open occurs in the secondary voltage
What is the primary advantage of using propeller reduction gears?
To enable the engine RPM to be increased with an accompanying increase in power and allow the propeller shaft to remain at a lower RPM
What is the principal advantage of using propeller reduction gears?
To enable the engine RPM to be increased with an accompanying increase in power and allow the propeller to remain at a lower, more efficient RPM
Why do some turbine engines have more than one turbine wheel attached to a single shaft?
To extract more power from the exhaust gases than a single wheel can absorb
What is the purpose of the last chance oil filters?
To filter the oil immediately before it enters the main bearings
What is the purpose of the stem keys installed on the valve stems?
To hold the valve spring retaining washer in position
Why do turbine engine ignition systems require high energy?
To ignite the fuel under conditions of high altitude and low temperatures
What is the purpose of the diffuser section in a turbine engine?
To increase pressure and reduce velocity
Why is the pulley stop screw on a propeller governor adjustable?
To limit the maximum engine speed during takeoff
For what primary purpose is a turbine engine fuel control unit trimmed?
To obtain maximum thrust output when desired
What is the purpose of an engine-driven fuel pump bypass valve?
To prevent a damaged or inoperative pump from blocking the fuel flow of another pump in series with it
What is the purpose of a last chance oil filter?
To prevent clogging of the oil spray nozzles that spray the main bearings
What is the purpose of an exhaust outlet guard on a small reciprocating engine?
To prevent dislodged muffler baffles from obstructing the muffler outlet
Why is a constant-speed counterweight propeller normally placed in full HIGH PITCH position before the engine is stopped?
To prevent exposure and corrosion of the pitch changing mechanism
What is the primary purpose of the metal tipping which covers the blade tips and extends along the leading edge of each wood propeller blade?
To prevent impact damage to the tip and leading edge of the blade
Why is an aircraft reciprocating engine oil tank on a dry sump lubricating system equipped with a vent line?
To prevent pressure buildup in the oil tank
Why is an aircraft reciprocating engine oil tank on a dry sump lubrication system equipped with a vent line?
To prevent pressure buildup in the oil tank
What is the purpose of the check valve generally used in a dry sump lubrication system?
To prevent the oil from the supply tank from seeping into the crankcase during inoperative periods
What is the purpose of the safety circlet installed on some valve stems?
To prevent valves from falling into the combustion chamber
What is the purpose of an impulse coupling with a magneto?
To produce a momentary high rotational speed of the magneto
What is the purpose of using an impulse coupling with a magneto?
To produce a momentary high rotational speed of the magneto
Fuel boost pumps are operated...
To provide a positive flow of fuel to the engine
Why are fixed orifice nozzles used in the lubrication system of gas turbine engines?
To provide a relatively constant oil flow to the main bearings at all engine speeds
Why are high-tension ignition cables frequently routed from the distributors to the spark plugs in flexible metallic conduits?
To reduce the effect of high-frequency electromagnetic waves emanated during operation
What is the primary purpose of the hopper located in the oil supply tank of some dry sump engine installations?
To reduce the time required to warm the oil to operating temperature
What is the function of the stator vane assembly at the discharge end of a typical axial-flow compressor?
To straighten airflow to eliminate turbulence
What is the purpose of an arbor used in balancing a propeller?
To support the propeller on the balance knives
Which of the following defects would likely cause a hot spot on a reciprocating engine cylinder?
Too much cooling fin area broken off
If an engine cylinder is to be removed, at what position in the cylinder should the piston be?
Top dead center of the compression stroke
What operational force causes propeller blade tips to lag in the opposite direction of rotation?
Torque bending
Which of the following generally renders an aluminum alloy propeller un-repairable?
Transverse cracks of any size
Which of the following generally renders an aluminum alloy propeller unrepairable?
Transverse cracks of any size
Dirt particles in the air being introduced into the compressor of a turbine engine will form a coating on all but which of the following?
Turbine blades
What would be the possible cause if a gas turbine engine has high exhaust gas temperature, high fuel flow, and low RPM at all engine power settings?
Turbine damage or loss of turbine efficiency
The highest heat-to-metal contact in a jet engine is the...
Turbine inlet guide vanes
The highest heat to metal contacts in a jet engine are the...
Turbine inlet nozzle vanes
The exhaust gas temperature (EGT) indicator on a gas turbine engine provides a relative indication of the...
Turbine inlet temperature
What instrument on a gas turbine engine should be monitored to minimize the possibility of a "hot" start?
Turbine inlet temperature
What instrument on a gas turbine engine should be monitored to minimize the possibility of a 'hot' start?
Turbine inlet temperature
Which of the following engine variables is the most critical during turbine engine operation?
Turbine inlet temperature
Which of the following is the ultimate limiting factor of turbine engine operation?
Turbine inlet temperature
The most important factors affecting thermal efficiency in a turbine engine are...
Turbine inlet temperature, compression ratio, and the component efficiencies of the compressor and turbine
A gas turbine engine comprises which three main sections?
Turbine, compressor, and combustion
In an axial-flow turbine engine, compressor bleed air is sometimes used to aid in cooling the...
Turbine, vanes, blades, and bearings
What should be done initially if a turbine engine catches fire when starting?
Turn off the fuel and continue engine rotation with the starter
Prior to an oil level check on a dry sump engine,
Turn the propeller by hand several times to pump the oil from the engine to the oil tank
Before attempting to start a radial engine that has been shut down for more than 30 minutes,
Turn the propeller by hand three to four revolutions in the normal direction of rotation to check for liquid lock
The purpose of cascade vanes in a thrust reversing system is to...
Turn to a forward direction of the fan airstream
Each powerplant installed on an airplane with a Standard Airworthiness Certificate must have been...
Type certificated
The absolute pressure controller (APC) on some small engines is designed to regulate oil pressure which flows through the waste gate actuator and then through the controllers on the turbocharger system; the pressure between the turbocharger and the throttle valve is called...
Upper deck pressure
The absolute pressure controller on some small engines is designed to sense oil pressure which flows through the waste gate actuator and then through the controllers on the turbocharger system; the pressure between the turbocharger and the throttle valve is called...
Upper deck pressure
Two-stroke cycle engines, light-sport aircraft engines operate on a mix of oil and gasoline that is delivered to the carburetor via gravity feed, or...
Use an oil injection system
Which of the following conditions would most likely lead to detonation?
Use of fuel with too low an octane rating
How should corrosion-resistant steel parts such as exhaust collectors be blast cleaned?
Use sand which has not previously been used on iron or steel
One of the best ways to increase engine power and control detonation and preignition is to...
Use water injection
The air passing through the combustion chamber of a turbine engine is...
Used to support combustion and to cool the engine
A QECA (quick-engine-change-assembly) is...
Used whenever the most efficient and expeditious replacement of an aircraft engine is relied upon
The starter gear section on the typical direct cranking starter used for starting a large reciprocating aircraft engine...
Uses a sun and planetary gear reduction system to transfer the energy of the starter motor to the engine flywheel
During overhaul, reciprocating engine exhaust valves are checked for stretch...
Using a manufacturer's contour or radius gauge or by the stem diameter just behind the head
Motor driven impeller and turbine fuel flow transmitters are designed to transmit data...
Using aircraft electrical system power
Typical engine mounts on a reciprocating engine...
Utilize a rubber shock mount to reduce vibration
Which type of pump is commonly used as a fuel pump on reciprocating engines?
Vane
Fuel lines are kept away from sources of heat, and sharp bends and steep rises are avoided to reduce the possibility of...
Vapor lock
Fuel lines kept away from sources of heat, sharp bends, and steep rises are avoided to reduce the possibility of...
Vapor lock
What is used in turbine engines to aid in stabilization of compressor airflow during low thrust engine operation?
Variable guide vanes and/or compressor bleed valves
The back-suction mixture control system operates by...
Varying the pressure acting on the fuel in the float chamber
When air passes through the venturi of a carburetor, what three changes occur?
Velocity increases, temperature decreases, and pressure decreases
Power recovery turbines used on some reciprocating engines driven by the...
Velocity of the exhaust gases
The purpose of a bleed valve, located in the beginning stages of the compressor, in an aircraft gas turbine engine is to...
Vent some of the air overboard to prevent a compressor stall
What carburetor component actually limits the desired maximum airflow to the engine at full throttle?
Venturi
What carburetor component measures the amount of air delivered to the engine?
Venturi
In a pressure injection carburetor, there is no float chamber. Fuel to the discharge nozzle is controlled by a diaphragm that uses a comparison of...
Venturi air pressure and carburetor inlet air pressure
What type of imbalance will cause a two-blade propeller to have a persistent tendency to come to rest in a horizontal position (with the blades parallel to the ground) while being check on a propeller balancing beam?
Vertical
After proper removal of aluminum blade damage, the affected surface should be polished with...
Very fine sandpaper
What is used to polish commutators or slip rings?
Very fine sandpaper
The time in seconds required for exactly 60 cubic centimeters of oil to flow through an accurately calibrated orifice at a specific temperature is recorded as a measurement of oil's...
Viscosity
The time in seconds required for exactly 60 cubic centimeters of oil to flow through an accurately calibrated orifice at a specific temperature is recorded as a measurement of the oil's...
Viscosity
On a reciprocating engine aircraft using a shrouded exhaust muffler system as a source for cabin heat, the exhaust system should be...
Visually inspected for any indication of cracks or an operational carbon monoxide detection test should be done
Electrical switches are rated according to the...
Voltage and the current they can control
One source commonly used for carburetor air heat is...
Warm ducted air from around the exhaust system
Surface treatment to counter the effects of dye-penetrant inspection on a propeller is accomplished by...
Washing off with solvent
What directly regulates the speed of a turbocharger?
Waste gate
During overhaul, the disassembled parts of an engine are usually degreased with some form of mineral spirits solvent rather than water-mixed degreasers primarily because...
Water-mixed degreaser resides may cause engine oil contamination in the overhauled engine
Aircraft wire groups or bundles should be tied where the supports are more than 12 inches apart using...
Waxed cotton cord, nylon cord, or fiberglass cord
Arcing at the brushes and burning of the commutator of a motor may be caused by...
Weak brush springs
Sharp bends should be avoided in ignition leads primarily because...
Weak points may develop in the insulation through which high tension current can leak
Magneto timing drift is caused by erosion of the breaker points and...
Wear of the cam followers
What type of oil system is found on turbine engines?
Wet or dry pump depending on design
Spark plug fouling caused by lead deposits occurs most often...
When cylinder head temperatures are relatively low
Engine fire detection on a Boeing 777 aircraft is accomplished with two loops which are monitored by the fire detection card file. When is a BITE test performed?
When power is applied, after a power interrupt, and every 5 minutes of operation
During what period does the fuel pump bypass valve open and remain open?
When the boost pump pressure is greater than fuel pump pressure
When does battery current flow through the primary circuit of a battery ignition coil?
When the breaker points are closed and the ignition switch is on
Under which of the following conditions is the oil cooler flow control valve open on a reciprocating engine?
When the temperature of the oil returning from the engine is too low
In a fixed fire-extinguishing system, there are two small lines running from the system and exiting overboard. The line exit ports are covered with a blowout type indicator disc. Which of the following statements is true?
When the yellow indicator disc is missing, it indicates the fire-extinguishing system has been normally discharged
In a fixed fire-extinguishing system, there are two small lines running from the system and exiting overboard. These line exit ports are covered with a blowout type indicator disc. Which of the following statements are true?
When the yellow indicator disk is missing, it indicates the fire-extinguishing system has been normally discharged
The E-gap angle is usually define as the number of degrees between the neutral position of the rotating magnet and position...
Where the contact points open
The E-gap angle is usually defined as the number of degrees between the neutral position of the rotating magnet and the position...
Where the contact points open
The use of water on Class D fires...
Will cause the fire to burn more violently and can cause explosions
Electrical circuit protection devices are installed primarily to protect the...
Wiring
Fuel flow on many light aircraft with reciprocating engines is measure...
With a pressure-based flow meter
When cleaning turbine engine fuel nozzles, loosen carbon deposits...
With an approved cleaning product and remove softened deposits with a soft bristle brush
Hot spark plugs are generally used in aircraft powerplants...
With comparatively low operating temperatures
On an aircraft that utilizes an exhaust heat exchanger as a source of cabin heat, how should the exhaust system be inspected?
With the heater air shroud removed
The receiving inspection for an engine needing to be overhauled...
includes checking the airworthiness directives, serve bulletins, and type certificate compliance
The major purpose of an engine overhaul is to...
inspect, repair, and replace worn engine parts