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CPL Test Series
Question Bank
Questions for INDIGO SYSTEMS( 515-806)
Answer the following questions
Test Mode
Training Mode
1.
Batteries are rated in
Amperes/volts.
Watts.
Amperes.hours
Ohms.
2.
The ice protection system currently used for the most modern jet aeroplanes is the
Hot air system
Liquid de-icing system
Electrical de-icing system
Pneumatic system with expandable boots
3.
Assuming cabin differential pressure has attained the required value in normal flight conditions, if flight altitude is maintained
the outflow valves will move to the fully closed position
the pressurisation system ceases to function until leakage reduces the pressure.
a constant mass air flow is permitted through the cabin.
the outflow valves will move to the fully open position.
4.
The type of hydraulic fluid which has the highest resistance against cavitation is
Synthetic fluid.
Vegetable oil based fluid (caster oil).
Water and glycol based fluid
Mineral oil based fluid
5.
In flight, the most commonly used anti-icing method for the wings of modern commercial aircraft fitted with turbo-jet units is
Thermal (use of hot air).
Mechanical (pneumatic source which acts by deforming the profiles of the leading edge).
Electrical (electrical resistances).
Physical/chemical (glycol-based liquid).
6.
A torsion link assembly is installed on the landing gear to
lock the landing gear
absorb the spring tension
avoid rotation of the piston rod relative to the gear oleo strut.
control the wheels
7.
On most modern airliners the cabin pressure is controlled by regulating the
Bleed air valve
RPM of the engine
Airflow leaving the cabin.
Airflow entering the cabin.
8.
The resistors R1 and R2 are connected in parallel. The value of the equivalent resistance (Req) so obtained is given by the following formula
Req = R1 + R2
Req = R1 x R2
1/Req = 1/(R1 + R2)
1/Req = 1/R1 + 1/R2
9.
The purpose of a voltage regulator is to control the output voltage of the
generators at varying speeds and the batteries at varying loads
generator at varying loads and speeds
batteries at varying loads
output of the TRU.
10.
The term ""Bootstrap"", when used to identify a cabin air conditioning and pressurisation system, refers to the
means by which pressurisation is controlled.
charge air across the inter-cooler heat exchanger
source of the charge air.
cold air unit (air cycle machine) arrangement
11.
The function of a feed box in the fuel tank is to
trap fuel sediments or sludge in the lower part of the tank
ventilate the tank during refuelling under high pressure
increase the fuel level at the boost pump location
distribute the fuel to the various tanks during refuelling
12.
The frequency of the current provided by an alternator depends on
the strength of the excitation current
its phase balance
its rotation speed
its load
13.
The pressurization of the cabin is controlled by
The engine's RPM.
The engine's bleed valves
The cabin inlet airflow
The cabin outflow valve.
14.
The frequency of an AC generator is dependent upon the
number of individual poles and the field strength
number of individual poles only
number of pairs of poles and the speed of the rotor
field strength and the speed of the rotor.
15.
If the maximum operating altitude of an airplane is limited by the pressurized cabin, this limitation is due to the maximum
Positive cabin differential pressure at maximum operating ceiling
Negative cabin differential pressure at maximum operating ceiling
Negative differential pressure at maximum cabin altitude
Positive cabin differential pressure at maximum cabin altitude
16.
The heating facility for the windshield of an aircraft is
Only used when hot-air demisting is insufficient
Used only at low altitudes where there is a risk of ice formation.
Harmful to the integrity of the windows in the event of a bird strike
Used on a continual basis as it reduces the thermal gradients which adversely affect the useful life of the components.
17.
In a steep turn to the left, when using spoilers
The right aileron will ascend, the left one will descend, the right spoiler will extend and the left one will retract
The right aileron will descend, the left one will ascend, the right spoiler will retract and the left one will extend.
The right aileron will ascend, the left one will descend, the right spoiler will retract and the left one will extend.
The right aileron will descend, the left one will ascend, the right spoiler will extend and the left one will retract.
18.
A ""trip-free"" type circuit breaker is a circuit protection device which
can be reset at any time
will allow the contacts to be held closed in order to clear a fault in the circuit
will not allow the contacts to be held closed while a current fault exists in the circuit
is free from the normal CB tripping characteristic.
19.
""Frequency wild"" in relation to a AC generation system means the generator
output frequency varies with engine speed
voltage regulator is out of adjustment
output frequency is too low.
output frequency is too high
20.
Assuming cabin differential pressure has attained the required value in normal flight conditions, if flight altitude is maintained
the pressurisation system must be controlled manually
the pressurisation system ceases to function until leakage reduces the pressure.
a constant mass air flow is permitted through the cabin.
the outflow valves will move to the fully open position
21.
In hydraulic system, a shuttle valve
allows two possible sources of pressure to operate one unit.
allows two units to be operated by one pressure source
regulates pump delivery pressure
is a self-lapping non-return valve.
22.
During level flight at a constant cabin pressure altitude (which could be decreased, even at this flight level), the cabin outflow valves are
At the pre-set position for take-off
fully closed until the cabin climbs to a selected altitude.
Partially open
Fully closed until the cabin descends to a selected altitude
23.
In jet aeroplanes the 'thermal anti-ice system' is primary supplied by
turbo compressors
the APU
bleed air from the engines
ram air, heated via a heat exchanger.
24.
When an underspeed fault is detected on an AC generator connected to the aircraft AC busbar, the protection device opens the
exciter breaker
generator breaker
exciter breaker, generator breaker and tie breaker
exciter breaker and generator breaker.
25.
In an alternator rotor coil you can find
Three-phase AC.
Only induced current
AC.
DC.
26.
The automatic fuelling shut off valve
cuts off the fuel in case of engine fire
stops fuelling as soon as a certain pressure is reached
stops fuelling as soon as a certain fuel level is reached inside the tank
stops fuelling as soon as the fuel spills into the ventline
27.
If the pressure in the cabin tends to become lower than the outside ambient air pressure the
negative pressure relief valve will open
negative pressure relief valve will close
outflow valve open completely.
air cycle machine will stop
28.
In order to produce an alternating voltage of 400 Hz, the number of poles required in an AC generator running at 6000 rpm is
4
8
12
24
29.
An artificial feel unit system
is mounted in parallel on a spring tab.
must be mounted in series on an irreversible servo-control unit.
is necessary on a reversible servodyne unit.
must be mounted in parallel on an irreversible servo-control unit
30.
The Auxiliary Power Unit (APU) has its own AC generator which
is driven at constant speed throught a Constant Speed Drive (CSD), in the same way as the main AC generator
is excited by its Generator Control Unit (GCU) as soon as the APU starts up
supplies the aircraft with three-phase 115-200 V, 400 Hz AC.
must have the same characteristics as the main AC generator so that it can be easily coupled with the latter
31.
In flight, if the constant speed drive (CSD) temperature indicator is in the red arc the
pilot has to throttle back
pilot must disconnect it and manually control the alternator
pilot must disconnect it, and the generator is not available for the rest of flight
pilot can disconnect it to allow it to cool and use it again
32.
During fuelling the automatic fuelling shut off valves will switch off the fuel supply system when
the fuel has reached a predetermined volume or mass.
there is fire
fuelling system has reached a certain pressure
the surge vent tank is filled
33.
Circuit breakers protecting circuits may be
used only in DC circuits
used in AC and DC circuits
used only in AC circuits
reset at any time
34.
Usually, electric heating for ice protection is used on
Fin leading edges.
Slat leading edges
Pitot tubes
Elevator leading edges
35.
The hydraulic oil, entering the hydraulic pump, is slightly pressurised to
ensure sufficient pump output
prevent vapour locking.
prevent cavitation in the pump
prevent overheating of the pump.
36.
Fuel pumps submerged in the fuel tanks of a multi-engine aircraft are
centrifugal low pressure type pumps
low pressure variable swash plate pumps
centrifugal high pressure pumps.
high pressure variable swash plate pumps
37.
Cabin pressure is controlled by
controlling the flow of air into the cabin with a constant outflow
delivering a substantially constant flow of air into the cabin and controlling the outflow.
the cabin air mass flow control inlet valve(s).
the cabin air re-circulation system
38.
The cabin heating supply in a heavy jet transport aircraft is obtained from
an electrical heater system
hot air coming from the engine's compressors
a fuel heater system
hot air coming from the engine's turbines
39.
As regards the Generator Contol Unit (GCU) of an AC generator, it can be said that:1. The GCU controls the AC generator voltage2. Modern GCUs are provided with a permanent indication to record the failure3. All the commands originating from the control panel are applied via the GCU, except dog clutch release4. The Auxiliary Power Unit (APU) provides the excitation of the AC generator as soon as the APU starts upThe combination regrouping all the correct statements is
3, 4
2, 3
1, 3
2, 4
40.
""Conditioned"" air is air that has
had any moisture removed from it.
been controlled in respect of temperature and pressure
had the oxygen content reduced
had the oxygen content increased
41.
Immediately after starting engine(s) with no other electrical services switched on, an ammeter showing a high charge rate to the battery
would be normal and is only cause for concern if the high charge rate persists
indicates a faulty reverse current relay
indicates a battery failure since there should be no immediate charge
indicates a generator failure, thus requiring the engine to be shut down immediately
42.
When the AC generators are connected in parallel, the reactive loads are balanced by means of the
energizing current
frequency.
torque of the Constant Speed Drive (CSD).
voltage.
43.
The tanks of a hydraulic system are pressurized
by the air conditioning system.
in flight only
by an auxiliary system
by bleed air coming from the turbine-engine.
44.
The pack cooling fan provides
cooling air to the pre-cooler
cooling air to the primary and secondary heat exchanger during cruise
air to the eyeball outlets at the Passenger Service Unit (PSU).
cooling air to the primary and secondary heat exchanger during slow flight and ground operation
45.
An accumulator in a hydraulic system will
store fluid under pressure
reduce fluid temperature only.
increase pressure surges within the system
reduce fluid temperature and pressure
46.
The frequency of an AC generator is dependent on the
field strength and the speed of the moving part.
number of individual poles only
number of individual poles and the field strength
number of pairs of poles and the speed of the moving part
47.
Hydraulic fluids
Are irritating to eyes and skin and cause high fire risk.
Cause high fire risk.
Do not require special care.
Are irritating to eyes and skin.
48.
The vapor lock is
A stoppage in a fuel feeding line caused by a fuel vapor bubble
The abnormal mixture enrichment caused by a greater gasoline vaporisation in the carburettor
The effect of the water vapor bubbles in the induction manifold caused by the condensation
The exhaust gases obstructions caused by an engine overheating
49.
The capacity of a battery is expressed in terms of
internal resistance
watts.
volts.
ampere-hours
50.
An aircraft with a pressurized cabin is settled at its cruise level.During the flight, a malfunction of the pressure controller is detected by the crew and the cabin rate of climb indicator reads -200ft/min.Given that :DELTA P: Differential pressureZc: Cabin altitude
The aircraft has to climb to a higher flight level in order to reduce Zc to its initial value.
A descent must be initiated to prevent the oxygen masks dropping when Zc reaches 14000ft.
DELTA P will rise up to its maximum value, thus causing the safety relief valves to open.
The crew has to intermittently cut off the incoming air flow in order to maintain a zero Zc.
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