8698-8802
The electronic-type fuel quantity indicating system consists of a bridge circuit A—an amplifier, an indicator, and a tank unit B—a tank, an amplifier, and an indicator C—a tank unit, a tank, and an amplifier
A
A transmitter in a fuel pressure warning system serves what function? A—Transmits an electrical signal to fluid pressure B—Converts fluid pressure to an electrical signal C—Transmits fluid pressure directly to the indicator
B
Pressure fueling of aircraft is usually accomplished through A—pressure connections on individual fuel tanks B—at least one single point connection C—individual fuel tank over wing and/or fuselage
B
What type of remote-reading fuel quantity indicating system has several probes installed in each fuel tank? A—Electromechanical B—Electronic C—Direct reading
B
What unit is generally used to actuate the fuel pressure warning system? A—Fuel flowmeter B—Pressure-sensitive mechanism C—Fuel pressure gauge
B
Which gas is used for purging an aircraft fuel tank? A—Helium or argon B—Carbon dioxide C—Carbon monoxide
B
Which of the following precautions is most important during refueling operations? A—All outside electrical sources must be disconnected from the aircraft B—Fuel to be used must be appropriately identified C—All electrical switches must be in OFF positon
B
Aircraft defueling should be accomplished A—with the aircraft's communication equipment on and in contact with the tower in case of fire B—in a hangar where activities can be controlled C—in the open air for good ventilation
C
Integral fuel tanks on transport aircraft are A—usually constructed of nonmetallic material B—readily removed from the aircraft C—formed by the aircraft structure
C
When installing a rigid fuel line, 1/2 inch in diameter, at what intervals should the line be supported? A—24 inches B—12 inches C—16 inches
C
(1) A fuel pressure relief valve is required on an aircraft positive-displacement fuel pump (2) A fuel pressure relief valve is required on an aircraft centrifugal fuel boost pump Regarding the above statements, A—only No.1 is true B—only No.2 is true C—both No.1 and No.2 are true
A
(1) The fuel jettison valve must be designed to allow flight personnel to close the valve during any part of the jettisoning operation (2) During the fuel jettisoning operation, the fuel must discharge clear of any part of the airplane Regarding the above statements A—both No.1 and No.2 are true B—only No.2 is true C—neither No.1 nor No.2 is true
A
(1) The function of a fuel heater is to protect the engine fuel system from ice formation (2) An aircraft fuel heater cannot be used to thaw ice in the fuel screen Regarding the above statements, A—only No.1 is true B—only No.2 is true C—both No.1 and No.2 are true
A
A capacitance-type fuel quantity indicating system measures fuel in A—pounds B—pounds per hour C—gallons
A
A digital fuel totalizer automatically indicates the amount of fuel used, fuel remaining, current rate of consumption, and fuel A—weight, aboard and takeoff B—remaining at the 45-minute IFR fuel reserve C—remaining, flight time at the current power setting
A
A dip gauge may be used to measure A—the amount of fuel in the tank B—system leakage with the system shut down C—fuel pump diaphragm leakage
A
According to Part 23, what minimum required markings must be placed at or near each appropriate fuel filler cover for reciprocating engine-powered airplanes? A—The word "Avgas" and the minimum fuel grade B—The word "Fuel" and usable fuel capacity C—The word "Avgas" and the total fuel capacity
A
Aircraft pressure fueling systems instructional procedures are normally placarded on the A—fuel control panel access door B—lower wing surface adjacent to the access door C—aircraft ground connection point
A
An electrical type fuel quantity indicating system consists of an indicator in the cockpit and a A—float-operated transmitter installed in the tank B—float resting on the surface of the tank C—float-operated receiver installed in the tank
A
Before fueling an aircraft by using the pressure fueling method, what important precaution should be observed? A—The truck pump pressure must be correct for that refueling system B—The truck pump pressure must be adjusted for minimum filter pressure C—The aircraft's electrical system must be on the indicated quantity gauge readings
A
Fuel is moved overboard in most fuel jettison systems by A—boost pumps B—gravity C—gravity and engine-driven fuel pumps
A
Fuel jettisoning is usually accomplished A—through a common manifold and outlet in each wing B—by gravity flow into the outboard wing tanks and overboard through a common outlet in each wing C—through individual outlets for each tank
A
Fuel system components must be bonded and grounded in order to A—drain off static charges B—prevent stray current C—retard galvanic corrosion
A
Fuel-boost pumps are operated A—to provide a positive flow of fuel to the engine B—primarily for fuel transfer C—automatically from fuel pressure
A
How does temperature affect fuel weight? A—Cold fuel is heavier per gallon B—Warm fuel is heavier per gallon C—Temperature has no effect
A
How many vents, arranged so that they are not likely to become plugged at the same time, must be used in multiengine fuel systems? A—Two B—Four C—Six
A
In an electronic-type fuel quantity indicating system, the tank sensing unit is a A—capacitor B—variable resistor C—variable inductor
A
In some aircraft with several fuel tanks, the possible danger of allowing the fuel supply in one tank to become exhausted before the selector valve is switched to another tank is prevented by the installation of A—a fuel pressure warning signal system B—a fuel pressure relive valve C—an engine fuel pump bypass valve
A
One advantage of electrical and electronic fuel quantity indicating systems is that the indicator A—can be located any distance from the tank(s) B—has no movable devices C—always measures volume instead of mass
A
The primary purpose of an aircraft's fuel jettison system is to quickly achieve a A—lower landing weight B—balanced fuel load C—reduced fire hazard
A
What are the four general types of fuel quantity gauges? 1. Sight glass 2. Mechanical 3. Electrical 4. Electronic 5. Bourdon tube 6. Vane-type transmitter 7. Litmus indicator 8. Direct-reading static pressure type A—1,2,3,4 B—1,3,6,8 C—2,3,5,7
A
What is one purpose of the fuel tank vent? A—To maintain atmospheric pressure B—To decrease fuel vapor pressure C—To decrease tank internal air pressure
A
What is the minimum distance allowed between a fuel tank and the fire wall separating the engine? A—One-half inch B—One inch C—Two inches
A
What is the primary purpose of the crossfeed system? A—To allow the feeding of any engine from any tank B—To allows the feeding of fuel from one tank for defueling C—To provide automatic refueling of a tank to any desired level
A
What is the purpose of a float-operated transmitter installed in a fuel tank? A—It sends an electric signal to the fuel quantity indicator B—It senses the total amount of fuel density C—It senses the dielectric qualities of the fuel and air in the tank
A
What method would be used to check for internal leakage of a fuel valve without removing the valve from the aircraft? A—Place the valve in the OFF position, drain the strainer bowl, and with boost pump on, watch to see if fuel flows to the strainer bowl. B—Remove fuel cap(s), turn boost pump(s) on, and watch for bubbling in the tanks C—Apply regulated air pressure on the downstream side of the fuel pump and listen for air passing through the valve
A
What precautions must be observed if a gravity-feed fuel system is permitted to supply fuel to an engine from more than one tank at a time? A—The tank airspace's must be interconnected B—The fuel outlet ports of each tank must have the same cross-sectional area C—Each tank must have a valve in its outlet that automatically shuts off the line when the tank is empty
A
What should be used to inert an integral fuel tank before attempting repairs? A—CO2 B—Water C—Steam
A
When fuel quantity is measured in pounds instead of gallons, the measurement will be more accurate because fuel volume A—varies with temperature change B—increases when temperature decreases C—varies with changes in atmospheric pressure
A
When inspecting a removable rigid fuel tank for leaks, what procedure should be followed? A—pressure the tank with air and brush with soapy water B—fill the tank with water and pressurize with air and brush with soapy water C—pressurize the tank with air and submerge in water to locate leaks
A
When moving the mixture control on a normally operating engine into the idle cutoff position, engine RPM should A—slightly increase before the engine starts to die B—slightly decrease and then drop rapidly C—remain the same until the cutoff is effected, then drop rapidly
A
Which aircraft fuel quantity indicating system incorporates a signal amplifier? A—Electronic B—Sight glass C—Electrical
A
Which of the following is employed to maintain lateral stability when jettisoning fuel? A—Two separate independent systems B—Crossfeed system C—Two interconnected system
A
Which of the following is necessary to effectively troubleshoot a fuel pressure warning system? A—The manufacturer's maintenance manuals B—AC 43.13-1B, Acceptable Methods, Techniques, and Practices-Aircraft Inspection and Repair C—A set of Federal Aviation Regulations
A
Which of the following would give the first positive indication that a change-over from one fuel tank to another is needed? A—Fuel pressure warning B—Fuel pressure gauge C—Fuel quantity indicator
A
Which statement concerning an electronic capacitance-type fuel quantity indicating system is true? A—It has no moving parts in the tank B—It has two tubes separated by an electronic field in the tank C—It utilizes a variable capacitor to indicate the fuel tank capacity
A
Why are jet fuels more susceptible to water contamination than aviation gasoline? A—Jet fuel has a higher viscosity than gasoline B—Jet fuel is lighter than gasoline; therefore, water is more easily suspended C—Condensation is greater because of the higher volatility of jet fuels
A
Why is the main fuel strainer located at the lowest point in the fuel system? A—It traps any small amount of water that may be present in the fuel system B—It provides a drain for residual fuel C—It filters and traps all micro-organisms that may be present in the fuel system
A
many fuel tanks incorporate ____________ valves to prevent fuel from flowing away from the boost pump or tank outlet when the aircraft is in a high "G" maneuver A—flapper B—check C—dump
A
(1) A fuel heater can use engine bleed air as a source heat (2) A fuel heater can use engine lubricating oil as a source of heat Regarding the above statements, A—only No.1 is true B—both No.1 and No.2 are true C—neither No.1 nor No.2 is true
B
(1) A fuel pressure gauge is a differential pressure indicator (2) A fuel pressure gauge indicates the pressure of the fuel entering the carburetor Regarding the above statements, A—only No.2 is true B—both No.1 and No.2 are true C—neither No.1 nor No.2 is true
B
(Refer to Figure 17). What is the purpose of the pump crossfeed valve? A—Balance the fuel in the tanks B—Allow operation of engines from one tank C—Allow operation of the left engine when the right fuel-boost pump is inoperative
B
A fuel jettisoning system required under certain conditions if the maximum takeoff weight exceeds the maximum landing weight. What regulations cover the requirements of fuel jettisoning? A—Federal Aviation Regulation Part 43 and 91 B—Federal Aviation Regulation Part 23, 25 and CAM 4b C—Federal Aviation Regulation Part 21, 43 and CAM 8
B
A probe or a series of probes is used in what kind of fuel quantity indicating system? A—Selsyn B—Capacitor C—Synchro
B
An aircraft's integral fuel tank is A—usually located in the bottom of the fuselage B—a part of the aircraft structure C—a self-sealing tank
B
Fuel baffles are installed in tanks to prevent _____ caused by changes in the attitude of the aircraft. A—vapors B—surging C—starvation
B
Fuel heaters are used with fuel systems for turbine engines to prevent ____ in the fuel from clogging system filters A—moisture B—ice crystals C—contamination
B
Fuel jettisoning past the limits prescribed by Federal Aviation Regulations is usually prevented by A—closely monitoring the fuel quantity and turning off the fuel dump switch(es) B—dump limit valves or a low-level circuit C—standpipes in the fuel tanks
B
How many engine driven fuel pumps per engine are required for engines requiring fuel pumps? A—Two engines can share one fuel pump B—One fuel pump for each engine C—Two fuel pumps for each engine
B
If an aircraft is fueled from a truck or storage tank which is known to be in contaminated with dirt or water, periodic checks of the aircraft's fuel tank sumps and system strainers A—can be eliminated except for the strainer check before the first flight of the day and the fuel tank sump checking during 100-hour and annual inspections B—are still necessary due to the possibility contamination from other sources C—can be sharply reduced since contamination from other sources is relatively unlikely and of little consequences in modern aircraft fuel system
B
The primary purpose of a fuel tank sump is to provide a A—positive system of maintaining the design minimum fuel supply for safe operation B—place where water and dirt accumulations in the tank can collect and be drained C—reserve supply of fuel to enable the aircraft to land safely in the event of fuel exhaustion
B
The purpose of the baffle plate in a fuel tank is to A—provide an expansion space for the fuel B—resist fuel surging within the fuel tank C—provide internal structural integrity
B
What flight safety-related advantage does a pressure fueling system provide? A—Keeps the aircraft within weight and balance limitation B—Reduces the changes for fuel contamination C—Reduces the time required for fueling
B
What is one disadvantage of using aromatic aviation fuels? A—A fuel intercooler is required B—Deteriorates rubber parts C—Results in low fuel volatility
B
What is the purpose of flapper-type check valves in integral fuel tanks? A—To allow defueling of the tanks by suction B—To prevent fuel from flowing away from the boost pumps C—To allow the engine-driven pumps to draw fuel directly from the tank if the boost pump fails
B
What should be used to remove flux from an aluminum tank after welded repairs? A—Soft brush and warm water B—5 percent solution of nitric or sulfuric acid C—Mild solution of soap and warm water
B
What unit would be adjusted to change the fuel pressure warning limits? A—Fuel flowmeter bypass valve B—Pressure-sensitive mechanism C—Fuel pressure relive valve
B
Where is fuel pressure taken for the pressure warning signal on most aircraft engines? A—Outlet side of the boost pump B—Fuel pressure line of the carburetor C—Between the fuel pump and the strainer
B
Why are centrifugal-type boost pumps used in fuel systems of aircraft operating at high altitude? A—Because they are positive displacement pumps B—To supply fuel under pressure to engine-driven pumps C—To permit cooling air to circulate around the motor
B
(1) Gas-turbine-engine fuel systems are very susceptible to the formation of ice in the fuel filters (2) A fuel heater operates as a heat exchanger to warm the fuel Regarding the above statements, A—only No.1 is true B—only No.2 is true C—both No.1 and No.2 are true
C
A fuel pressure warning switch contacts close and warning light is turned on when A—A measured quantity of fuel has passed through it B—the fuel flow stops C—the fuel pressure drops below specified limits
C
A fuel totalizer is a component which indicates the A—total amount of fuel being consumed by all engines B—amount of fuel in any given tank C—amount of fuel in all tanks
C
A transducer in a fuel pressure system serves what function? A—Transmits an electrical signal to the transmitter for fluid pressure B—Transmits electrical signal proportional to the fluid pressure C—Converts fluid pressure directly through a transmitter to the indicator
C
A typical large transport aircraft fuel manifold system allows how many of the following? 1. All tanks can be serviced through a single connection 2. Any engine can be fed from any tank 3. All engines can be fed from all tanks simultaneously 4. A damaged tank can be isolated from the rest of the fuel system A—1 and 2 B—1,2, and 3 C—1,2,3, and 4
C
As a general rule, which statement is true regarding fuel leaks? A—Strains, seeps, and heavy seeps are not flight hazard B—All fuel leaks regardless of location or severity are considered a hazard to flight C—Strains, seeps, and heavy seeps, (in addition to running leaks) are considered flight hazards when located in unvented areas of the aircraft
C
Entrained water in aviation turbine fuel is a hazard because of its susceptibility to freezing as it passes through the filters. What are common methods of preventing this hazard? A—Micromesh fuel strainers and fuel heater B—High-velocity fuel pumps and fuel heater C—Anti-icing fuel additives and fuel heater
C
Flapper valves are used in fuel tanks to A—reduce pressure B—percent a negative pressure C—act as check valves
C
How is the outlet fuel pressure regulated on a submerged, single-speed, centrifugal-type fuel pump? A—By the engine-driven pump's design and internal clearance B—By the first check valve downstream from the pump C—By the pump's design and internal clearances
C
If it is necessary to enter an aircrafts's fuel tank, which procedure should be avoided? A—Continue purging the tank during the entire work period B—Station an assistant outside the fuel tank access to perform rescue operations if required C—Conduct the defueling and tank purging operation in an air-conditioned building
C
Normal fuel crossfeed system operation in multiengine aircraft A—calls for jettisoning of fuel overboard to correct lateral instability B—reduces contamination and/or fire hazards during fueling or defueling operations C—provides a means to maintain a balanced fuel load condition
C
One advantage of electrical and electronic fuel quantity indicating systems is that A—the indicators are calibrated in gallons; therefore, no conversion is necessary B—only one transmitter and one indicator are needed regardless of the number of tanks C—several fuel tank levels can be read on one indicator
C
Select one means of controlling the fuel temperature on turbine-powered aircraft. A—Engine bleed air to the fuel filter B—Engine bleed air to the fuel tank C—Engine bleed air to a head exchanger
C
The location of leaks and defects within the internal portions of the fuel system can usually be determined by A—visual inspection for evidence of wet spots and stains, and feeling for unusually warm components B—performing a fuel flow check C—observing the pressure gauge and operating the selector valves
C
The presence of fuel stains around a fuel nozzle would indicate A—too much fuel pressure B—excessive airflow across the venturi C—clogged fuel nozzle
C
The probe of a capacitance-type fuel level gauge is essentially a A—float-actuated variable capacitor B—capacitor with fuel and air acting as one plate C—capacitor with fuel and air acting as a dielectric
C
The purpose of a diaphragm in a vane-type fuel pump is to A—equalize fuel pressure at all speeds B—vary fuel pressure according to throttle setting C—compensate fuel pressure to altitude changes
C
The use of turbine fuels in aircraft has resulted in some problems not normally associated with aviation gasolines. One of these problem is A—increasing viscosity of fuel as fuel temperature lowers at altitude B—higher vapor pressure C—microbial contaminants
C
What is the dielectric (nonconducting material) in a capacitance-type fuel quantity indicating system? A—Outer wheel of the capacitor B—Fuel in the tank C—Fuel and air in the tank
C
What is the recommended practice for cleaning a fuel tank before welding? A—Purge the tank with air B—Flush the inside of the tank with clean water C—Steam clean the tank interior
C
What is used in many aircraft to prevent bubbles in the fuel after it leaves the tank when atmospheric pressure is lower than fuel vapor pressure? A—Air-fuel B—Antifoaming additives C—Boost pumps
C
What method is used on turbine-powered aircraft to determine when the condition of the fuel is approaching the danger of forming ice crystals? A—Fuel pressure warning B—Fuel pressure gauge C—Fuel temperature indicator
C
What minimum required markings must be placed on or near each appropriate fuel filler cover on utility category aircraft? A—The word "Avgas" and the minimum fuel grad, and the total fuel tank capacity B—The word "Avgas" and the minimum fuel grade or designation for the engines, and the usable fuel tank capacity C—The word "Avgas" and the minimum fuel grade
C
What must each fuel quantity indicator be calibrated to read during level flight when the quantity of fuel remaining is equal to the unusable fuel supply? A—The total unusable fuel quantity B—Both the total unusable fuel quantity and the unusable fuel quantity in each tank C—Zero
C
Which of the following may be used for the repair of fuel leaks on most integral fuel tanks? A—Welding and resealing B—Brazing and resealing C—Riveting and resealing
C
Which of the following would be most useful to locate and troubleshoot an internal fuel leak in an aircraft fuel system? A—Aircraft structure repair manual B—Illustrated parts manual C—A fuel system schenmatic
C
Which procedure must be followed when refueling aircraft with sweptback wings? A—Defuel all the tanks at one time B—Defuel the inboard wing thanks first C—Defuel the outboard wing tanks first
C
Why are integral fuel tanks used in many large aircraft? A—To reduce fire hazards B—To facilitate servicing C—To reduce weight
C
Why is it necessary to vent all aircraft fuel tanks? A—To ensure a positive head pressure for a submerged boost pump B—To exhaust fuel vapors C—To limit pressure differential between the tank and atmosphere
C
Why is the capacitance fluid quantity indicating system more accurate in measuring fuel level than a mechanical type? A—Only one probe and one indicator are necessary for multiple tank configurations B—It measures in gallons and convert to pounds C—It measures by weight instead of volume
C
a fuel system must be designed to prevent fuel vapor ignition caused by A—over-heating B—back-fire C—lightning
C
