256 final
The two basic problems that would prevent an alternator from producing electrical power are:
a. Short or open diode b. Open in field circuit
If the series field of a compound-wound generator aids the shunt field, the generator is said to be _______ -compounded.
cumulative
When a terminal is properly crimped onto an electrical wire, the joint should be _____________ (what percent) as strong as the wire its self.
100%
A three phase alternator has stator windings that are degrees apart.
120
A __________ (what number) gauge aluminum wire could be used to replace a 4-guage copper wire.
2
Two important functions of the oil that flows through the center housing of a turbocharger are:
a. Lubricate the bearings b. Remove heat
The direct cranking starter used on high-horsepower reciprocating engines consists of these two basic components:
a. Motor assembly b. Gear section
The smallest terminal stud allowed for electrical power systems is a number _________.
10
Generator speed is generally ___ to ___ times crankshaft speed.
1 1/8, 1 1/2
Copper wire use for aircraft electrical system installations must meet MIL-W-____________ specification.
22759
The inside diameter of a conduit must be about ___________ percent larger than the maximum diameter of the wire bundle it encloses.
25
A bonding strap that is required to carry return current from a component should not have a resistance of more than ____________ milliohms.
3
No wire bundle should be closer than _______ (how many) inches from a control cable.
3
There should never be more than __________ (how many) terminals on any one stud.
4
The smallest gauge aluminum wire recommended for use in aircraft systems is __________ gauge.
6
The standard insulation strength for electrical wire used in aircraft installations is ________ volts.
600
Aluminum wire used for aircraft electrical system installations must meet MIL-W-_____________ specification.
7072
Reciprocating engine induction systems can be broadly classified as:
a. Naturally aspirated b. Supercharged
_______________ (Bonding or Shielding) consists of connecting all components in the aircraft together so that there will be no insulated components on which electrical charges can build up.
Bonding
Two basic types of electrical wiring installations are:
a. Open wiring b. In conduit
Most light aircraft use (AC or DC)
DC
_______________ (bonding or shielding) is used in an aircraft electrical system to intercept radiated electrical energy.
Shielding
Some _____________ _ (what manufacturer) engines use a right angle worm drive connected to the starter motor.
Teledyne Continental
The induction system consists of these four major components:
a. Air scoop b. Air filter c. Fuel metering device d. Intake manifold
Three sources of compressed air for starting an engine equipped with an air turbine starter are:
a. Aircraft mounted auxiliary power unit b. Ground power unit c. Bleed air from operating engine
The two pressures sensed by the ratio controller are:
a. Ambient b. Manifold air pressure
The two basic ways to prevent electromagnetic interference in radio and electronic equipment are:
a. Bonding b. Shielding
The three sections of a turbocharger are:
a. Compressor housing b. Bearing housing c. Turbine housing
Two advantages of passing the fuel/air mixture through the engine oil sump are:
a. Cools the oil b. Warms the induction air
What three types of air filter systems have been used on aircraft?
a. Flocked screen b.Paper c. Polyurethane foam
The three types of DC generators are?
a. Series b. Shunt c. Compound
The three units of a three-unit voltage regulator are:
a. Voltage Regulator b. Current limiter c. Reverse current cutout
Electric starting systems for gas turbine aircraft are of these two general types:
a. direct cranking b. starter-generator
If a wire bundle is routed through a compartment parallel to a fuel line, the wire bundle should be _________ ( above below) the fuel line.
above
When the waste gate is fully closed ___________ (all or none) of the exhaust gases must pass through the turbocharger.
all
Engines equipped with fuel injection systems are not susceptible to carburetor icing, but are equipped with an __________ air system to allow airflow in case of filter clogging or impact icing.
alternate
An aircraft engine that can develop its rated sea level horsepower to a given altitude is called a/an __________ engine.
altitude
Large transport category aircraft have brushless alternators to reduce ________ at _______
arcing, altitude
Automatic reset circuit breakers ___________ (are or are not) used in aircraft electrical systems.
are not
The direction of rotation in a DC motor is accomplished by reversing the direction of current flow in either the ______ or the ____ ________.
armature, field windings
Heavy-duty DC generators will use a ___________ (what type) voltage regulator.
carbon pile
The waste gate actuator used with a turbocharger system controlled with an absolute pressure controller is _____________ (opened or closed) by oil pressure acting on the piston.
closed
The carburetor heat control should always be in the __________ (hot or cold) position when operating on sandy or dusty surfaces.
cold
Heavy duty DC generators are usually of the __________ -wound type.
compound
When selecting the wire size to use in an electrical system installation, you must consider the maximum _________ the wire will carry and the maximum _______ ________ allowed.
current, voltage drop
Electrical wire bundles are fastened to the aircraft structure with insulated ____________ clamps.
cushion
If the airplane's battery polarity is accidentally switched, there is a real possibility of damaging the alternators _________
diodes
The DC alternator produces AC and then rectifies it using six (what component).
diodes
Internally driven superchargers are located _____________ (upstream or downstream) of the fuel metering device.
downstream
The circuit breaker or fuse should open before the conductor ____________ __________.
emits smoke
Manifold pressure of a turbocharged engine is measured on the _______ (engine or turbocharger) side of the throttle valve.
engine
In a brushless alternator, the GCU controls the main generator's output by monitoring and regulating the current in the ______ ________
exciter field
"The turbocharger shaft is supported in ball bearings." This statement is _____________ (true or false).
false
The voltage output of a generator is controlled by controlling the strength of the ___ current.
field
The speed of a variable speed motor is controlled by varying the current in the _____ _________.
field windings
The principal difference between a relay and a solenoid is that a relay has a ____________ iron core, while a solenoid has a _________ one.
fixed, moveable
The operation known as _________________ is used to restore residual magnetism to the DC generator.
flashing the field
Inertia starters crank aircraft engines with the energy that is stored in a _____________.
flywheel
The main purpose of a CSD is to allow the alternator to produce AC power at a constant ____________
frequency
The ______________ ___________ (what type) starter is very similar to a small gas turbine engine.
fuel/air combustion
An aircraft engine whose rated horsepower has been increased by using a supercharger is called a/an ___________ engine.
ground boosted
A Bendix drive uses a drive pinion which moves back and forth on ______________ splines.
helical
On a dual spool axial flow compressor gas turbine engine, the starter will rotate only the ________ (high - or low) speed compressor.
high
When an ohmmeter reverse-biases a diode, the resistance will be __ _ (high or low).
high
CSD's, or constant speed drives, are typically driven by a ____________ _______
hydraulic motor
If the points on a vibrating voltage regulator stick closed, the generator output will ___ (increase, decrease, or cease).
increase
The capillary tube restrictor is on the ______________ (inlet or outlet) oil line inside the waste gate actuator.
inlet
Air supplied for carburetor heat ___________ (is or is not) filtered.
is not
Warm air is ___________ (more or less) dense than cool air.
less
An air turbine starter uses _________ (low or high) pressure air.
low
An aircraft whose engines are equipped with a two-speed supercharger will use the _____________ (high or low) blower position for takeoff.
low
When an ohmmeter forward-biases a diode, the resistance will be ___ (high or low).
low
Alternate air doors may be operated _______ or _______.
manually or automatically
To stop the flow of field current, most systems use a field switch activated by the _____ _
master switch
The function of the reverse current cut-out is to prevent the generator from _______ and discharging the battery.
motoring
It is __ _ (sometimes or never) necessary to flash the field of an alternator.
never
Turbocharger bearings are cooled by a continuous flow of engine _______________.
oil
Some modern horizontally opposed engines that use float carburetors have the carburetor mounted directly to the bottom of the engine ________ ___________ , and the induction pipes pass through the warm oil.
oil sump
Causing an engine to produce an excess of manifold pressure is called _______ the engine.
overboosting
A ratio controller of a turbocharger system is installed in ________________ (series or parallel) with an absolute pressure controller.
parallel
New brushes are seated by using _________ (silicon carbide, emery, or sandpaper) wrapped over the armature.
sandpaper
Since the _____________ wound generator has such poor voltage regulation. It is not used as an aircraft generator.
series
The electric motors for direct-cranking starters are of the _________ (series or shunt) type.
series
A variable speed motor is either a _______ or a ________ motor.
shunt, series
Electrically operated starters used for gas turbine engines are usually of the _______________ - type.
starter-generator
The wiring between components must be of _________ (stranded or solid) construction.
stranded
The variable automatic pressure controller (VAPC) maintains a constant upper deck pressure for each position of the _______ valve.
throttle
The value of alternating current can be changed using a _______ (what device).
transformer
A circuit breaker that holds the circuit open if a fault is present, regardless of the position of the operating control, is called a _________ - ___________ circuit breaker.
trip-free
Superchargers which are powered by the energy of the exhaust gases are called ______________.
turbochargers
There are three types of AC motors; they are the __________ .____________, and ____________ types.
universal, induction, synchronous
Alternating current has the advantage over direct current in that its voltage can be stepped _______ or ________
up, down
Another name for turbocharger discharge pressure is ___________________ pressure.
upper deck
The turbocharger is located _______ (upstream or downstream) of the fuel metering device.
upstream
Two-position "on-off" switches should be mounted so that the "on" position is reached by an __________ (upward or downward) movement.
upward
Most junction boxes in the powerplant area are mounted ___________ (vertically or horizontally).
vertically
Compound generators are used where __________ is of prime importance.
voltage regulation
The valve that is used to control the amount of exhaust gases routed to the turbocharger is known as a __________ _____________.
waste gate
Air turbine starters are used with many gas turbine engines because of their high power-to-_________ ratio.
weight
A DC Alternator ___________ (will or will not) have a reverse current cut-out relay in the regulator circuit.
will not
