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CPL Test Series
Question Bank
Questions for INDIGO SYSTEMS( 515-806)
Answer the following questions
Test Mode
Training Mode
1.
Static dischargers :1. are used to set all the parts of the airframe to the same electrical potential2. are placed on wing and tail tips to facilitate electrical discharge3. are used to reset the electrostatic potential of the aircraft to a value approximating 0 volts4. are located on wing and tail tips to reduce intererence with the on-board radiocommunication systems to a minimum5. limit the risks of transfer of electrical charges between the aircraft and the electrified cloudsThe combination regrouping all the correct statements is
1,2,5.
2,4,5.
3,4,5.
1,3,4.
2.
The wing of an aircraft in flight, powered by engines located under the wing, is subjected to a bending moment which causes its leading edge, from the wing root to the wing tip, to operate in
compression.
compression, then in tension.
tension.
tension, then in compression
3.
The purpose of the baffles in an aircraft's integral fuel tank is to
Prevent overpressure in the tank.
Prevent the fuel from flowing in the vent lines
Prevent mixture of the fuel and hydraulic fluid
Restrict the fuel from flowing to the wing tips during abnormal manoeuvre (side slipping...).
4.
The air-conditioning pack of a present-day aircraft consists of several components: these include two heat exchangers, the primary exchanger (P) and the secondary exchanger (S).The functions of these heat exchangers are as follows
P: precools the engine bleed airS: reduces the temperature of the air from the primary exchanger or from the pack's compressor.
P: pre-cools the engine bleed airS: increases the temperature of the air used for airconditioning of cargo compartment (animals).
P: warms up engine bleed airS: recirculates the cabin air, reducing its temperature
P: warms up engine bleed airS: increases the temperature of air originating from the compressor of the pack.
5.
Under normal conditions (JAR 25) the cabin pressure altitude is not allowed to exceed
4000 ft
8000 ft
10000 ft
6000 ft
6.
The purpose of a battery protection unit is generally to isolate the battery:1 - from the bus when the battery charge is deemed satisfactory2 - when there is a battery overheat condition3 - in case of an internal short circuit4 - in case of a fault on the ground power unitThe combination which regroups all of the correct statements is
1
1 - 2 - 3 -4
2001-02-03
02-Jan
7.
'Fail safe construction' is
A simple and cheap type of construction
A type of construction for small aircraft only.
A construction which is suitable for aerobatic flight
A type of construction in which the load is carried by other components if a part of the structure fails.
8.
The term ""pressure cabin"" applies when an aeroplane
has the ability to maintain a constant cabin differential pressure at all flight altitudes.
has the means to maintain cabin pressure higher than ambient pressure.
has the ability to maintain a constant cabin altitude at all flight altitudes.
is only pressurised in the area of the control cabin
9.
When a landing gear wheel is hydroplaning, its friction factor is equal to
0.5
0.1
1
10.
What is the purpose of the pack cooling fans in the air conditioning system?
Supplying the heat exchangers with cooling air during cruise flight.
Supplying the heat exchangers with cooling air during slow flights and ground operation
Supplying the Passenger Service Unit (PSU) with fresh air.
Cooling of the APU compartment
11.
The difference between (1) a fuse and (2) a circuit breaker is
(1) suitable for high currents, (2) not suitable for high currents.fuse circuit breaker
(1) not suitable for high currents, (2) suitable for high currents.fuse circuit breaker
(1)not resettable, (2)resettable
(1)not resettable, (2) not resettable
12.
The Ram Air Turbine (RAT) provides emergency hydraulic power for
undercarriage selection and automatic brake system
flight controls in the event of loss of engine driven hydraulic power
nose wheel steering after the aeroplane has landed
flap extension only
13.
A torsion link assembly is installed on the landing gear to
avoid rotation of the piston rod relative to the gear oleo strut.
absorb the spring tension
control the wheels
lock the landing gear
14.
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
Partially open
fully closed until the cabin climbs to a selected altitude.
Fully closed until the cabin descends to a selected altitude
15.
The essential difference between aircraft AC alternators and DC generators (dynamos) is that the
induced (output) windings of the alternators are fixed (stator), and the dynamos have a fixed inductor (field) coil
alternators supply all of the output current through the commutators and brush assemblies
induced windings of the alternators are rotating (rotor), and the dynamos have a rotary inductor coil
The alternators generate much less power than DC generators
16.
If the frequency of the supply in a series capacitive circuit is increased, the current flowing in the circuit will
remain the same
decrease
increase.
be zero
17.
On a modern large pressurized transport aircraft, the maximum cabin differential pressure is approximately
3 - 5 psi
7 - 9 psi
22 psi
13 - 15 psi
18.
The function of the Generator Breaker is to close when the voltage of the
battery is greater than the alternator voltage and to open when the opposite is true
alternator is greater than the battery voltage and to open when the opposite is true
generator is greater than battery voltage and to open when the opposite is true
battery is greater than the generator voltage and to open when the opposite is true
19.
The voltage of a fully charged lead-acid battery cell is
1,2 volts.
1,4 volts
2,2 volts.
1,8 volts.
20.
The purpose of baffle check valves fitted in aircraft fuel tanks is to
prevent positive pressure build up inside the tank.
close the vent lines in case of turbulence.
prevent fuel movement to the wing tip.
damp out movement of the fuel in the tank
21.
A thermal circuit breaker
forbids any overcurrent
is a protection system with a quick break capacity of about one hundredth of a second.
protects the system in the event of overheating, even without exceeding the maximum permissible current
can be reset without any danger even if the fault remains
22.
Engine bleed air used for air conditioning and pressurization in turbo-jet aeroplanes is usually taken from the
turbine section.
compressor section.
fan section
by-pass ducting
23.
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 the fuel spills into the ventline
stops fuelling as soon as a certain fuel level is reached inside the tank
24.
The reason for the fact that an aeroplane designed for long distances cannot simply be used for short haul flights at higher frequencies is that
in that case some fuel tanks remain empty during the whole flight, which stresses the aeroplane's structure in an unacceptable way
these aeroplanes often consume too much fuel on short haul flights
the lifetime of the fatigue sensitive parts has been based on a determined load spectrum
the procedures and checklists for this kind of aeroplanes will take too much time
25.
(For this question use appendix )Associate the correct legend to each of the numbered diagrams
1- cantilever 2- fork 3- half fork 4- dual wheels
1- cantilever 2- dual wheels 3- half fork 4- fork
1- half-fork 2- single trace 3- cantilever 4- dual wheels
1- half fork 2- fork 3- cantilever 4- tandem
26.
A circuit breaker
can only be reset after major maintenance
can be reset on the ground only
may be reset manually after the fault has been rectified
is self resetting after the fault has been rectified
27.
A turbo-fan cold air unit will
not affect the charge air pressure
decrease charge air pressure whilst causing hte temperature to rise in the heat exchanger
cause a pressure drop as well as an associated temperature drop in the charge air
increase charge air pressure whilst causing hte temperature to drop in the heat exchanger
28.
Thermal plugs are installed in
cargo compartments
cabin windows
wheel rims
fire warning systems
29.
The part of the flight that will cause the highest loads on the torsion link in a bogie gear is
Touch down with crosswind
Gear down selection
Taxiing with a small turning radius.
Braking with an inoperative anti skid system
30.
The function of a constant speed drive (CSD) in an AC generating system is to
directly maintain a constant proportion between the rpm of an engine and a generator
drive the generator at a constant speed
vary generator rpm in order to compensate for various AC loads
vary the engine rpm (within limits) to compensate for various AC loads.
31.
The hydraulic device similar to an electronic diode is a
shutoff valve
check valve
distribution valve.
flow control valve
32.
The modern anti-skid processes are based on the use of a computer whose input data is:1. idle wheel speed (measured)2. braked wheel speed (measured)3. brake temperature (measured)4. desired idle wheel train slipping rate5. tire pressureThe combination regrouping all the correct statements is
1, 2, 3, 4, 5
2, 4.
1, 2, 4.
1, 3.
33.
On starting, in a brushless AC generator with no commutator rings, the generator is activated by
a set of permanent magnets.
the auxiliary winding.
the main field winding.
the stabilizer winding jointly with the voltage regulator.
34.
In order that DC generators will achieve equal load sharing when operating in parallel, it is necessary to ensure that
equal loads are connected to each generator busbar before paralleling.
the synchronising bus-bar is disconnected from the busbar system
their voltages are almost equal
adequate voltage differences exists
35.
The fuel supply system on a jet engine includes a fuel heating device, upstream of the main fuel filter so as to
prevent, at low fuel temperature, the risk of ice formation from water contained in the fuel
prevent fuel from freezing in fuel pipes due to low temperatures at high altitude
ease low pressure pumps work by increasing fuel fluidity.
maintain and improve fuel heating power
36.
In some aircraft, there is a protection device to avoid the landing gear being inadvertently retracted on the ground. It consists of
A warning light which is activated by the WOW (Weight On Wheels) sensor system.
A latch located in the landing gear lever.
An aural warning horn
A bolt.
37.
On modern transport aircraft, cockpit windows are protected against icing by
Electric heating
Vinyl coating
Rain repellent system
Anti-icing fluid
38.
Assume a constant speed DC generator providing a constant output voltage. If the electrical load increases, the voltage regulator will
maintain the intensity of the excitation current constant
increase the intensity of the excitation current
decrease the intensity of the excitation current
change the direction of the excitation current
39.
A relay is
another name for a solenoid valve
a unit which is used to convert electrical energy to heat energy.
a device which is used to increase electrical power.
a magnetically operated switch
40.
The fuel system boost pumps are used to
avoid the bubbles accumulation
feed the lines with fuel for directing it to the engine at a positive pressure
avoid the bubbles accumulation and feed the lines with fuel for directing it to the engine at a positive pressure.
feed the fuel control units, which inject the pressurized fuel into the engine.
41.
On a non-stressed skin type wing, the wing structure elements which take up the vertical bending moments Mx are
the spars
the skin.
the ribs
the webs
42.
The correct statement about rain protection for cockpit windshields is that
the alcohol de-icing system for cockpit windows is also suitable for rain protection
rain repellent should never be sprayed onto the windshield unless the rainfall is very heavy
the electric de-icing system for cockpit windows is also suitable for rain protection
wipers are sufficient under heavy rain conditions to provide adequate view through the cockpit windows
43.
In a bootstrap cooling system the supply air is first
used to increase the cabin air supply pressure when the charge pressure is too low.
passed across an expansion turbine, then compressed and passed through a secondary heat exchanger
passed across an expansion turbine, then directly to the heat exchanger
compressed, passed through a secondary heat exchanger, and then across an expansion turbine
44.
The Auxiliary Power Unit (APU) has its own AC generator which
is excited by its Generator Control Unit (GCU) as soon as the APU starts up
must have the same characteristics as the main AC generator so that it can be easily coupled with the latter
is driven at constant speed throught a Constant Speed Drive (CSD), in the same way as the main AC generator
supplies the aircraft with three-phase 115-200 V, 400 Hz AC.
45.
The turbine in a cold air unit (air cycle machine)
drives the compressor in the unit and causes a pressure increase in the conditioning air.
drives the compressor in the unit, creating a temperature drop in the conditioning air
drives the compressor which provides pressurisation
increases the pressure of the air supply to the cabin.
46.
The term ""Bootstrap"", when used to identify a cabin air conditioning and pressurisation system, refers to the
source of the charge air.
means by which pressurisation is controlled.
cold air unit (air cycle machine) arrangement
charge air across the inter-cooler heat exchanger
47.
The voltage regulator of a DC generator is connected in
parallel with the shunt field coil
series with the shunt field coil
series with the armature
parallel with the armature
48.
The reason for using inverters in an electrical system is
To change the DC voltage
To change DC into AC.
To change AC into DC.
To avoid a short circuit.
49.
In hydraulic system, a shuttle valve
regulates pump delivery pressure
is a self-lapping non-return valve.
allows two units to be operated by one pressure source
allows two possible sources of pressure to operate one unit.
50.
A magnetic circuit-breaker is
can be reset without any danger even when fault remains
is a system with a slow response time
permits an overcurrent limited in time.
a protection system that has a quick tripping response
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