REVISION QUESTION – Air – DGCA Question Bank For Politics

#1. The principle of operation of firewire is

Positive coefficient of impedance, negative coefficient of inductance

Positive coefficient of resistance, negative coefficient of capacitance

Positive coefficient of inductance, negative coefficient of impedance

Positive coefficient of capacitance, negative coefficient of resistance

#2. What type of fire extinguisher would be used on a propane fire?

Foam

Water

Dry powder

Sand

#3. On what principle do smoke detectors work?

Resistance and capacitance

Ionisation and impedance

Optical and ionization

Inductance and light diffraction

#4. An ion detector detects

Smoke and fire

Smoke

Overheat

Light

#5. If an artificial feel unit were fitted it would be connected

In parallel with the primary controls

In series with the primary controls

In series with the secondary controls

In parallel with the secondary controls

#6. In a twin jet fuel system what is the function of a feeder box

Equally distribute the fuel to each tank during refuelling

Prevent pump cavitation

Feed fuel to the volumetric top-off unit

#7. A twin jet aircraft would normally be refuelled by which of the following methods?

Overwing refuelling

Suction refueling

Open line refuelling

Pressure refueling

#8. The fuel tanks of a modern passenger airliner are filled by

Gravity

Fuel is sucked in by the aircraft pumps

Fuel is pumped in by the fuel truck

The VTO system

#9. The purpose of a refuelling volumetric top off unit (VTO) is:

To keep the feeder box full of fuel at all times

To close the fuelling valve when the tank is full

To close the surge check valves in the outboard tanks to keep the tank full until the centre tank fuel has been used

To close the tank vent system when the tank is full

#10. Fuel tank booster pumps are: -

Spur gear pumps – high pressure

Centrifugal pumps – high pressure

Spur gear pumps – low pressure

Centrifugal pumps – Low pressure

#11. The advantage of a float type fuel gauging system is 1. Simple 2. Compensates for variations of SG 3. Reads fuel quantity by mass 4. Compensates for change of aircraft attitude

3 & 4

2 & 3

1 only

1 & 3

#12. The function of the baffles in a fuel tank is

To prevent movement of fuel to the wingtip

To prevent fuel surge (or sloshing) during manoeuvring

To prevent pump cavitation

To reduce fuel flow at altitude

#13. The function of baffle check valves in a fuel tank is

To reduce fuel flow at altitude

To prevent fuel surge during manoeuvring

To prevent pump cavitation

To prevent movement of fuel to the wingtip

#14. A magneto is switched off by

Open circuiting the primary circuit

Grounding the secondary circuit

Open circuiting the secondary circuit

Grounding the primary circuit

#15. An impulse coupling in a magneto is provided to

Generate high voltage and advance the spark for starting

Increase the energy to the spark plug as the RPM increases.

Generate high voltage and retard the spark for starting

Allows a low energy value when ‘continuous ignition’ is selected

#16. A turbo-supercharger impeller is driven by

A connection through a gearbox connected to the crankshaft

A ram air turbine

An impulse coupling in a magneto is provided to

#17. A cylinder head temperature gauge measures

The temperature of the hottest cylinder

The temperature of all the cylinders and gives an average reading

The temperature of the coolest cylinder

The temperature of the two cylinders furthest away from each other divided by two

#18. EPR is measured by the ratio of

Turbine pressure to combustion chamber inlet pressure

High pressure compressor inlet pressure to exhaust pressure

Low pressure compressor inlet pressure to high pressure compressor outlet pressure

Exhaust pressure to low pressure compressor inlet pressure

#19. Where is EGT measured

In the jet pipe

HP turbine outlet

HP compressor outlet

Combustion chamber

#20. In a bootstrap air conditioning system what is the first thing the air does?

Goes through the primary heat exchanger, compressor then secondary heat exchanger

Goes through the compressor, turbine, secondary heat exchanger

Goes through the turbine, compressor and secondary heat exchanger

Goes through the compressor, secondary heat exchanger, turbine

#21. How are the loads on an aircraft busbar connected

Are in series so that current reduces through the busbar as loads are switched off

Are in parallel so that voltage reduces through the busbar as loads are switched off

Are in parallel so that current reduces through the busbar as loads are switched off

Are in series so that voltage reduces through the busbar as loads are switched off

#22. In a modern airliner what is hydraulic fluid used

Synthetic

Mineral

Mineral/alchohol

Vegetable

#23. The minimum height for door sills before a means of assisting escape is required is

1.83 m

1.82 m

1.28 m

1.38 m

#24. How are escape slides inflated

Fed from bleed air system

Self contained gas bottle

Hand pumped by cabin crew

Using the oral inflation adaptor

#25. If an aircraft is 340 nm from land and its one engine inop speed is 150 kts

Does not need lifejackets or life rafts.

Must carry lifejackets for each passenger only

Must carry life rafts but lifejackets are not necessary

Must carry lifejackets for each passenger and life rafts sufficient to carry all persons on board.

#26. The minimum number of fire extinguishers to be carried in the passenger cabin of an aircraft having 31 – 60 seats is

1

2

3

4

#27. The type of extinguishant to use on magnesium fires would be

CO2

Freon

Helium

Sand

#28. The correct extinguisher to use on a brake fire would be

Foam

Dry powder

CO2

Water

#29. If an aircraft has a maximum seating configuration of less than 200 but more than 9 a crash axe or crowbar must be carried

One on the flight deck only

One on the flight deck and one in the passenger cabin

Two on the flight deck and one in the fwd cargo hold

One on the flight deck and two in the passenger cabin

#30. An aircraft is certified to carry a maximum of 240 passengers, it is configured to carry 200 and actually has 180 passengers on board. The minimum number of drop-down oxygen masks provided must be

180

200

220

240

#31. The passenger oxygen drop-down mask stowage doors are released

By a lanyard operated by a barometric capsule

Mechanically

Electrically for chemical oxygen generators and pneumatically for gaseous system

Manually by the cabin crew

#32. In a centrifugal compressor

The air enters the eye tangentially and leaves the periphery axially

The air enters the eye radially and leaves the tip tangentially

The air enters the impeller axially at the eye and leaves at the periphery tangentially.

#33. What happens to pressure, temperature and velocity of the air in the diffuser of a centrifugal compressor

Velocity increase, pressure and temperature decrease.

Velocity decrease, pressure and temperature increase.

Velocity, pressure and temperature increase.

Velocity, pressure and temperature decrease.

#34. The type of smoke detection system fitted to aircraft is

Optical and ionization

Chemical

Electrical

Magnetic

#35. The flight deck warning on activation of an engine fire detection system is

Warning bell

Gear warning

Warning light and warning bell

Warning light

#36. Hydraulic reservoirs are pressurised by

Ram air in flight only

Separate helium gas system

Air from the air conditioning system

Engine bleed air from turbine engine

#37. The purpose of a hydraulic fuse is to

Allow the parking brake to remain on overnight if required

Allow a reduced pressure to the wheel brake system to avoid locking the wheels

Prevent over-pressurising the reservoir as altitude increases

Prevent loss of system fluid if the pipeline to a brake unit should rupture

#38. A shuttle valve will

Allow the accumulator to be emptied after engine shut down

Reduce pump loading when normal system pressure is reached

Automatically switch to a more appropriate source of hydraulic supply

Operate on a rising pressure, higher than the Full Flow relief valve

#39. With regard to an air cycle type ECS pack, where is the water separator fitted

After the humidifier

Before the cold air unit compressor

Between the compressor and turbine

After the cold air unit turbine

#40. In the event that an emergency decent causes the cabin pressure to decrease below ambient pressure

The outward relief valve will open

The outflow valve will close

The inward relief valve will open

The safety valve will close

#41. The purpose of a ditching control valve is

Close the outflow valves

Open outflow valves

To allow rapid depressurisation

To dump the toilet water after landing

#42. In a bleed air anti icing system the areas that are heated are

The whole of the wing

Wing leading edge slats and flaps

Wing leading edges and slats

Trailing edge flaps

#43. On a modern turbo prop aircraft the method of anti-icing/de-icing the wings is?

Fluid

Pneumatic boots

Electrical heater mats

Hot air bled from the engines

#44. If an aircraft maximum operating altitude is limited by the pressure cabin, this limit is due to

The maximum positive pressure differential at maximum operating ceiling

The maximum positive pressure differential at maximum cabin altitude

The maximum number of pressurisation cycles

The maximum zero fuel mass at maximum pressure altitude

#45. Long haul aircraft are not used as short haul aircraft because

Checklists would be too time consuming to complete

It would use too much fuel

Some tanks will be empty the whole time imposing too much strain on the aircraft

Structures are given fatigue lives based on their use

#46. The properties of Duralumin are 1. Aluminium/copper base 2. Aluminium/magnesium base 3. Hard to weld 4. Easy to weld 5. Good thermal conductivity 6. Poor resistance to air corrosion

1, 3 and 5

2, 3 and 5

1, 2 and 3

4, 5 and 6

#47. An undercarriage leg is considered to be locked when:

It is down

The amber light is on

Mechanically locked by an ‘over-centre’ mechanism

The actuating cylinder is at the end of its travel

#48. An underinflated tyre on a dry runway

Increases wear on the shoulder

Increases wear on the crown

Increases viscous aquaplaning speed

Will cause the tyre temperature to reduce

#49. Kreuger flaps are positioned

Towards the wing tip

At the wing inner leading edge

Along the whole leading edge

At the wing trailing edge

#50. What are flaperons

Combined spoiler and flap

Combined elevators and flaps

Combined elevators and flaps c. Combined ailerons and elevators

Combined flap and ailerons

#51. What is the purpose of inboard ailerons

To reduce wing bending at high speed

To reduce wing twisting at low speed

To reduce wing bending at low speed

To reduce wing twist at high speed

#52. What is the purpose of trim tabs

To reduce stick forces in manoeuvres

To reduce stick holding forces to zero

To increase control effectiveness

To reduce control effectiveness

#53. To reduce control effectiveness

Full face and provide a continuous flow of oxygen

Mouth and nose and provide a continuous flow of oxygen

Full face and provide oxygen on demand

Mouth and nose and provide oxygen on demand

#54. Oxygen supplied to the flight deck is

Gaseous, diluted with ambient air if required

Chemically generated and diluted with cabin air if required

Gaseous, diluted with cabin air if required

Chemically generated, diluted with ambient air if required

#55. If during pressurised flight the outflow valve closes fully due to a fault in the pressure controller the:

Skin will be overstressed and could rupture.

Safety valve opens when the differential pressure reaches structural max diff

The inward relief valve will open to prevent excessive negative differential.

ECS packs are automatically closed down.

#56. In a fan jet engine the bypass ratio is

Internal mass airflow divided by external mass airflow

External mass airflow divided by internal mass airflow

Internal mass airflow divided by mass fuel flow

Mass fuel flow divided by mass fuel flow

#57. The thrust reverser light illuminates on the flight deck annunciator when the

Thrust reverser doors have moved to the reverse thrust position

Thrust reverser doors have been selected but the doors haven’t moved

Thrust reverser doors are locked

Thrust reverser doors are unlocked

#58. In very cold weather the pilot notices slightly higher than normal oil pressure on start up. This:

Indicates an oil change is required

Is indicative of a blocked oil filter

Is acceptable providing it returns to normal after start up

Abnormal but does not require the engine to be shut down

#59. If a fuel tank having a capacitive contents gauging system is empty of fuel but has a quantity of water in it:

The gauge will show full scale high

The gauge will show the mass of the water

The gauge will show empty.

The gauge needle will ‘freeze’.

#60. In a four stroke engine, when the piston is at BDC at the end of the power stroke the position of the valves is Inlet Exhaust

Closed Closed

Open Open

Open Closed

Closed Open

#61. What is the effect on EGT and EPR if a bleed valve is opened?

Increase, increase

Decrease, decrease

Decrease, increase

Increase, decrease

#62. Where is torque measured in a turboprop engine

Accessory gearbox

Reduction gearbox

At the turbine

At the constant speed unit oil pump

#63. Propeller blade angle is

The angle between the blade chord and the plane of rotation

The angle between the relative airflow and the chord

Dependent upon RPM and TAS

The difference between effective pitch and geometric pitch

#64. Why is a propeller blade twisted

To reduce the thrust at the root of the blade

To prevent the blade from fully feathering

To reduce the tip speed

To even out the thrust force along the length of the blade

#65. For calculating resistances in parallel the formula is

1 = 1 X 1 X 1 RT R1 R2 R3

RT = R1 + R2 + R3

RT = R1 x R2 x R3

1 = 1 + 1 + 1 RT R1 R2 R3

#66. When a fuse operates it is __And when a circuit breaker operates it is_

High current low current

Low current high current

Non re-settable re-settable

Re-settable non re-settable

#67. A hot busbar is one that

Supplies galley power

Is permanently connected to the battery

Carries all of the non essential loads

Is connected to the battery in an emergency

#68. In an AC distribution system what is the purpose of the GCB

Maintains constant frequency

Connects the load busbar to the synchronising busbar

Controls generator field excitation

Connects a generator output to its load busbar

#69. An aircraft which uses DC as the primary source of power, AC for the instruments may be obtained from:

CSDU

Rectifier

Inverter

TRU

#70. Persistent over excitation of one generator field will cause:

The GCB and BTB to trip

The BTB and exciter control relay to trip

The GCB and exciter control relay to trip

The GCB and SSB to trip

#71. When a battery is nearly discharged, does the

Voltage decrease

Voltage and current decrease

Current increases because voltage has dropped

Electrolyte boil

#72. The state of charge of an aircraft battery on an aircraft with a voltmeter would be checked

On load

Off load

With the battery negative terminal disconnected

By monitoring the electrolyte resistance

#73. In a paralleled AC distribution system what regulates the real load

Torque from the CSDU (CSD)

Field excitation from the voltage regulator

Synchronising circuits in the BTB

A potentiometer on the Flight Engineers panel

#74. If the oil temperature gauge of the CSD is in the red what would action is required

Throttle back and allow to cool down

Auto disconnect

Manually disconnect and reconnect on the ground

Disconnect, then when cooled reconnect

#75. What is a transistorised static inverter in a DC circuit used for

Convert AC to DC

Provide field excitation current

Provide AC for instruments

To supply power to the emergency lights

#76. If the load increases on a ‘constant speed AC generator’ what does the voltage regulator do

Increases generator speed

Decreases field excitation

Remains the same

Increases field excitation

#77. Incorrect bonding of the aircraft structure could cause

Corrosion at skin joints

CB trips

Static on the radio

VOR interference

#78. The characteristics of a Unipole system are 1. Lighter 2. Easier fault finding 3. More likely to short circuit 4. Less likely to short circuit 5. It is not a single wire system

2, 4 and 5.

1, 2 and 3.

2, 4 and 1.

1, 4 and 5.

#79. The frequency of an AC generator is dependent upon

The RPM of the rotor

The number of poles in the rotor

The RPM and number of poles in the rotor

The number of poles in the rotor and the number of phase windings in the stator.

#80. With an almost discharged battery there will be:

A decrease of voltage with increasing load

Increase of current with decrease of voltage

Decrease of current with increasing load

Increase of voltage with increasing load

#81. When is an engine overheat firewire system activated

When an overheat is detected all along the length of both firewire loops

When an overheat affects one detector loop at a point anywhere along its length

When an overheat is detected all along the length of one firewire loop

When an overheat affects both detector loops at a point anywhere along their length.

#82. In an air cycle air conditioning system what is the function of the ground-cooling fan.

To re-circulate air through the mix manifold

To draw cooling air over the turbine

To blow air into the compressor

To draw cooling air over the heat exchangers

#83. How do you control power in a jet engine

By controlling the mixture ratio

By controlling the fuel flow

By controlling the airflow

By controlling the bleed valves

#84. In a normally aspirated piston engine carburettor icing can occur:

Between 0oC and –10oC

At more than + 10oC

Only at less than + 10oC if there is visible moisture

Only above 5000 ft

#85. In a gas turbine engine fuel system why is the fuel heater before the filter

To prevent ‘waxing’

To help vaporization of the fuel

To prevent water in the fuel freezing and blocking the filter

To prevent the fuel from freezing and blocking the filter

#86. What is the purpose of the FCOC (Fuel Cooled Oil Cooler)

To maintain the oil at the correct temperature

To heat the fuel and cool the oil

To heat the oil and cool the fuel

To by-pass oil to the engine if the oil pressure filter becomes blocked

#87. What is the purpose of the torque links in a landing gear leg

To prevent the wheel rotating around the leg

To prevent shimmy

To transfer the brake torque to the wheel

To position the wheels in the correct attitude prior to landing

#88. An artificial feel system is needed in the pitch channel if:

Airplane has a variable incidence tailplane

Elevators are controlled through a reversible servo system

Elevator is controlled through a servo tab

Elevators are controlled through an irreversible servo system

#89. Auto brakes are disengaged:

When the ground spoilers are retracted

When the speed falls below 20 kts

On the landing roll when the autopilot is disengaged

By the pilot

#90. In the following diagram the landing gear arrangements shown are: 1. 2. 3. 4.

Fork cantilever levered tandem

Cantilever dual fork tandem

Cantilever fork half fork dual wheel

Half fork dual wheel cantilever fork

#91. In an aircraft with a fuel dumping system it will allow fuel to be dumped

Down to a predetermined safe value

Down to unuseable value

To leave 15 gallons in each tank

Down to maximum landing weight

#92. What does ‘octane rating’ when applied to AVGAS refer to:-

The waxing point of the fuel

The ability of the fuel to disperse water

The anti-knock value of the fuel

The volatility of the fuel

#93. How are modern passenger jet aircraft fuel tanks pressurised

By nitrogen from a storage cylinder

By ram air through the vent system

By bleed air from the pneumatic system

By a volumetric top off unit

#94. Refering to the following diagram: To get logic 1 output at A there must be a logic 1 input at:

C1 and C2 only

C1 and C3 only

C2 and C4 only

C3 only

#95. In which of the following areas would an overheat/fire warning be provided.

Fuel tank

Cabin

Tyres

Wheel/Undercarriage bay

#96. An axial flow compressor when compared to a centrifugal compressor

Takes in less air and is less prone to rupturing

Takes in more air and is more prone to rupturing

Takes in more air and is less prone to rupturing

Takes in less air and is more prone to rupturing

#97. Hydraulic pressure typically used in the system of large transport aircraft is

2000 - 3000psi

3000 - 4000psi

1000 - 2000psi

4000 - 5000psi

#98. The EGT indication on a piston engine is used

To control the cooling air shutters

To monitor the oil temperature

To assist the pilot to adjust the fuel mixture

To indicate cylinder head temperature

#99. A gas turbine engine having a single spool, the compressor will rotate:

At the same speed as the turbine

Slower than the turbine

Faster than the turbine

Independently of the turbine

#100. Because of its function an ‘AND’ gate may also be referred to as:

Invert or not gate

Any or all gate

All or nothing gate

Either or gate

#101. What type of hydraulic fluid is used in a modern passenger jet aircraft

Mineral based

Phosphate ester based

Vegetable based

Water based

#102. In a 4 stroke engine when does ignition occur in each cylinder

After TDC for starting and then before TDC every 2nd rotation of the crankshaft

Before TDC for starting and then after TDC every 2nd rotation of the crankshaft

After TDC for starting and then before TDC every rotation of the crankshaft

Before TDC for starting and then after TDC every rotation of the crankshaft

#103. When smoke appears in the cockpit, after donning the oxygen mask the pilot should select

Normal

100%

Diluter

Emergency

#104. Which part of the gas turbine engine limits the temperature

Combustion chamber

Turbine

Compressor

Exhaust

#105. What makes the non-rigid fittings of compressor and turbine blades rigid when the engine is running.

Spring locks

Thrust and drag forces

Aerodynamic and Centrifugal force

Tapered bead seats

#106. What ice protection system is used on most modern jet transport aircraft

Liquid

Electrical

Hot air

Pressure operated boots

#107. What frequency is commonly used in aircraft electrical distribution systems

200Hz

400 Hz

100Hz

50Hz

#108. When does the engine High Pressure fuel shut off valve close.

After a booster pump failure

When the engine fuel switch is selected ‘on’ during engine start

When flight idle is selected

When the engine fuel switch is selected ‘off’ during engine shut-down

#109. When does the Low Pressure fuel shut off valve close

When the fire handle is pulled

When the engine fuel switch is selected ‘on’ during engine start

When flight idle is selected

After a booster pump failure

#110. In a vapour cycle cooling system what is the purpose of the condenser

To remove moisture from the air by centrifugal action

To convert the refrigerant from a liquid to a gas

To convert the refrigerant from a gas to a liquid

To raise the pressure of the gas to allow efficient cooling

#111. What voltage is supplied to booster pumps on a modern jet airliner

115v AC single phase

200v AC three phase

28v DC from an inverter

12v DC from the battery

#112. An engine having a ‘Free turbine’

There is a mechanical connection between the power output shaft and the free turbine

There is no mechanical connection between the power output shaft and the free turbine

There is a mechanical connection between the compressor and the propeller shaft

Air enters via compressor inlet on the turbine

#113. If the pressure controller malfunctions during the cruise and the outflow valve opens what happens to: i) Cabin ROC ii) Cabin Alt iii) Differential pressure

i) Increase ii) Decrease iii) Decrease

i) Decrease ii) Increase iii) Decrease

i) Increase ii) Increase iii) Decrease

i) Increase ii) Increase iii) Increase

#114. What controls cabin pressurisation

ECS pack mass flow controller

Outflow valve

Engine bleed valve

Inflow valve

#115. If the fire handle is pulled in an aeroplane with an AC generator system what disconnects.

Exciter control relay and GCB

GCB and BTB

BTB and GCU

Exciter control relay only

#116. Which components constitute a crank assembly.

Crankshaft, camshaft, valve springs

Crankcase, crankshaft, pistons and connecting rods

Crankshaft, pistons and connecting rods

Propeller, crankshaft, connecting rods

#117. One stage of an axial compressor

Comprises a row of stators followed by a rotor disc

Has a compression ratio of 2:1

Comprises a rotor disc followed by a row of stators

Has a compression ratio of 0.8

#118. If a CSD overheat warning is shown.

The CSD can be disconnected and the pilot must control the alternator himself

The pilot must throttle back to reduce the load on the alternator

The CSD can be disconnected then reconnected later when the temperature has reduced

The CSD can be disconnected but not used for the rest of the flight

#119. A new tyre with wear on the tread and parallel grooves

Can be repaired once only

Can be repaired several times

Can never be repaired

Is fit for use only on a nose-wheel

#120. An emergency exit assisted escape device must be fitted if the door sill height is above:-

8ft with the aircraft on the landing gear with the nosewheel extended

8ft with the aircraft on the landing gear with the nosewheel collapsed

6ft with the aircraft on the landing gear with the nosewheel extended

6ft with the aircraft on the landing gear with the nosewheel collapsed

#121. In a compensated capacitance fuel contents system what happens to a fuel weight of 8000lbs if its volume increases by 5%

Decreases by 5%

Increases by 5%

Remains the same

Increases by 5% for every degree rise in temperature

#122. How do aircraft spoilers work?

Lower surfaces only, symmetrical and asymmetrical operation

Lower surfaces only, symmetrical operation

Upper surfaces only, symmetrical and asymmetrical operation

Upper surfaces only, symmetrical operation

#123. What is the total volume in the cylinder of a four stroke engine

A value equal to the cubic capacity

Swept volume minus clearance volume

Volume between TDC and BDC

Swept volume plus clearance volume

#124. After the power stroke on a piston engine the poppet valve sequence is?

Exhaust valve opens, inlet valve opens, exhaust valve closes

Exhaust valve closes, inlet valve opens, exhaust valve opens

Inlet valve opens, exhaust valve closes, inlet valve closes

Inlet valve closes, exhaust valve closes, inlet valve opens

#125. What speed does the LP compressor run at?

The speed of the LP turbine

The speed of the HP turbine

Half the engine speed

Constant speed

#126. What happens to the angle of attack of a fixed pitch propeller as the aircraft accelerates down the runway

Increases

Decreases

Remains the same

Blade angle changes to compensate for forward speed

#127. What happens to the AoA of a VP propeller with increasing TAS if the RPM and throttle levers are not moved.

Blade angle remains constant to compensate for forward speed

Increases

Decreases

Remains the same

#128. Where are smoke detectors fitted?

Toilets

Toilets and cargo compartments A, B, C, D, E

All cargo compartments

Toilets and cargo compartments B, C, E

#129. What colour is the hydraulic liquid in a modern jet airliner?

Purple

Red

Yellow

Pink

#130. On what principle does a fuel flow meter work

Volume and viscosity

Quantity of movement

Capacitive dielectric

Pressure and temperature

#131. What is engine pressure ratio?

The ratio of turbine outlet pressure to compressor inlet pressure

The ratio of turbine inlet pressure to compressor inlet pressure

Turbine outlet pressure x compressor outlet pressure

Compressor inlet pressure divided by turbine outlet pressure

#132. On what principle does the fuel contents gauging system work on a modern large aircraft?

Capacity affected by dielectric therefore changing EMF of system

Capacity affected by dielectric therefore changing resistivity of system

Changes in dielectric causes changes in capacitance

Change in dielectric causes change in distance between plates and therefore changes capacitance

#133. What are the advantages of a nicad battery? 1. More compact 2. Longer shelf life 3. Even voltage over total range before rapid discharge 4. Higher voltage than lead acid type

2, 3, and 4

1, 2, 3 and 4

1, 2 and 4

1, 2 and 3

#134. What would happen if the waste gate of a turbocharged engine seized in the descent?

Compressor will overspeed

Blow the turbine blades off

MAP may exceed its maximum permitted value in the induction manifold

RPM may exceed its maximum permitted value

#135. When is spark plug fouling most likely to occur?

In the climb if you have not adjusted the mixture

Cruise power

In the descent if you have not adjusted the mixture

Max take-off power

#136. Why, in the bootstrap system, is the air compressed before it enters the heat exchanger?

To provide a constant mass flow to the cabin

To ensure maximum pressure and temperature drop across the turbine

To ensure most rapid cooling through the heat exchanger

To provide a constant temperature air flow to the cabin

#137. What is a ram air turbine (RAT) which drives a hydraulic pump used for?

Nose wheel steering

Flap extension

Landing gear extension if the normal system fails

Flight controls in case of failure of the engine driven system

#138. As altitude increases what does the mixture control do to the fuel flow

Increases flow due to reduced air density

Increases flow due to increased air density

Reduces flow due to reduced air density

Reduces flow due to increased air density

#139. What is the coefficient of friction on an aquaplaning (hydroplaning) tyre?

0

0.1

0.5

1.0

#140. What is the purpose of the diluter demand valve in the emergency oxygen system?

To supply air only when inhaling

To dilute oxygen with air in crew oxygen system

To dilute oxygen with air in passenger oxygen system

To supply oxygen only when inhaling

#141. What limits the max. temperature in a gas turbine engine?

Temperature in the combustion chamber

Temperature at the exhaust

Temperature at the turbine

Temperature entering the combustion chamber

#142. What is the purpose of a surge box inside a fuel tank.

Ventilate the tank during high pressure refueling

Collect sediment at the bottom of the tank

Allow movement of fuel between tanks while refueling

Prevent sloshing of fuel away from pump inlet during abnormal manoeuvres

#143. Emergency oxygen is provided by:

One system for both flight deck and cabin

Two independent systems, one for flight deck, one for cabin

Two systems each capable of supplying the flight deck and cabin

Three systems, one for the flight deck, one for the passengers and one for the cabin crew.

#144. An aircraft planning to fly at FL330 with 120 seats fitted and 42 passengers on board must provide first aid oxygen for:

At least one passenger for the duration of the flight above 8000ft

No first aid oxygen is necessary

At least 3 passengers for the duration of the flight above 15000ft

At least one passenger for the duration of the flight above 14000ft

#145. A 12 volt lead acid battery has a broken connection in a cell, the battery:

Provides 1/12th less voltage for the same time

Provides 1/12th less voltage for 1/12th less time

Is unserviceable

Will suffer from thermal runaway

#146. A changeover relay

Allows an APU to connect to its busbar

Allows a GPU to connect to its busbar

Allows connection of AC to an unserviceable generator’s busbar

Allows an alternate source to supply an essential busbar.

#147. A relay is

A motorway breakdown service

A mechanically operated switch

An electrically operated switch

Another name for a solenoid

#148. Fuel heaters are fitted

In the wing fuel tanks

In the fuselage fuel tanks

In the engine fuel system mounted on the engine

All of the above

#149. The engine fire extinguisher system is activated:

After the engine has been shut down

Automatically when a fire warning is sensed

By the pilot when required

Automatically after a time delay to allow the engine to stop

#150. An unpressurised aircraft is flying above FL 100 and therefore must have sufficient oxygen for:

Both pilots only

Both pilots immediately and the cabin crew plus all passengers after 30 minutes above FL 100 but below FL 130

Both Pilots and all passengers

Both pilots immediately and the cabin crew plus some passengers after 30 minutes above FL 100 but below FL 130

#151. An aircraft entrance door is fitted with an automatic escape slide, the door is ‘armed’ from the inside by the cabin crew:

The door cannot be opened from the outside

If the door is opened from the outside the slide will remain stowed

If the door is opened from the outside the slide will deploy and inflate

Entrance to the aircraft from outside must be made through the ‘break in’ panel

#152. Aircraft above a certain capacity must carry a crash axe, it is provided to

Cut through the aircraft fuselage to allow escape

Enable access behind panels and soundproofing to aid fire fighting

Cut firewood in a survival situation

Restrain disorderly passengers

#153. The function of stringers in the construction of the fuselage is:

To withstand shear stress

To provide an attachment for insulation

To provide support for the skin and to absorb some of the pressurization strain as tensile loading

To provide an alternate load path in the event of the failure of a frame.

#154. The type of refrigerant used in a vapour cycle cooling system is

Argon

Freon

Helium

BCF

#155. The requirement for an aircraft to have a fuel dumping system is:

All aircraft in the Transport Category having a maximum take off mass (MTOM) of 75,000kg or greater

All aircraft manufactured after 1997 having a MTOM of 7,500kg or more

Aircraft whose maximum landing mass (MLM) is significantly lower than its maximum take off mass (MTOM)

All aircraft with a seating capacity of 250 or more

#156. At what height is it mandatory for one of the flight deck crew to wear an oxygen mask

25,000ft

32,000ft

37,000ft

41,000ft

#157. A Volumetric Top-Off Unit (VTO), is provided in a fuel system to

Vent the tank to atmosphere when its full

Allow a main feed tank to be maintained at a predetermine level automatically, while being fed from an auxiliary tank

being fed from an auxiliary tank c. Allow the main tank to automatically maintain a predetermined fuel pressure

Prevent too much fuel from being dumped

#158. The type of engine layout shown on page 450 is

Two spool

Turbo fan

Free turbine

Prop fan

#159. The precautions to be taken during refuelling are

GPU may not be running during refueling

All earthing of aircraft parts to ground equipment must be completed before filler caps are removed

Passengers may be boarded (traversing the refuelling zone)

No radar or HF radios under test within 10 metres

#160. What prevents an impulse coupling operating at speeds above start speed, considering that it has flyweights

Electro-magnetic induction

Hydraulic clutch

Centrifugal force

On/off switch.

#161. What type of fire extinguisher must be on a flight deck

Water

Dry powder

Special fluid

Halon

#162. In a Bramah press one piston has an area of 0.05 m2 and has a force of 10 N acting on it. If the area of the second piston is 0.5m2, what force will it produce

1 N

20 N

25N

100 N

#163. What is the reason for putting the horizontal stabiliser on top of the fin

To be more efficient at high speed

No need for anti-icing

Create a pitch up by making the aeroplane tail heavy

To be out of the way of the wing down wash

#164. Where are thermal plugs fitted

Wheel rim

Cargo bay

Fuel tank

Oil tank

#165. In a non-stressed skin aircraft, bending loads acting on the wings are taken by

Skin

Spars

Stringers

Ribs

#166. In a stressed skin aircraft, bending loads acting on the wings are taken by

Ribs and stringers

Stringers and spars

Spars and skin

Spars and stringers

#167. Hydraulic fluid

Needs no special treatment

Is harmful to eyes and skin

Is a fire hazard

Is harmful to eyes and skin, and is also a fire hazard

#168. In a modern carburettor, mixture is controlled via

Airflow

Airflow, fuel flow and temperature

Fuel flow

Airflow and fuel flow

#169. The demand valve of a diluter demand oxygen regulator in normal mode operates when

The pressure to the regulator is more than 500 psi

User breathes in

User requires 100% oxygen

Diluter control is in the ‘normal’ position

#170. Torque links on an undercarriage come under most stress when

During crosswind landings

During pushback

Making tight turns when taxying

After take-off

#171. If cabin pressure is decreasing, the cabin VSI will indicate

Zero

Climb

Descent

Reducing pressure

#172. The battery in a search and rescue beacon (SARB) should last for

72 hours

48 hours

24 hours

12 hours

#173. When opening an aircraft door from outside, what happens to the escape slide

Inflates

Deploys, but does not inflate

Inflates, but stays inside its container

Is disarmed

#174. A shuttle valve is used to

Restrict the rate of operation of a system

Select the most suitable system pressure

Allow two supplies to be available to a service

To allow a constant volume pump to idle

#175. The temperature of hydraulic fluid is measured

After the cooler

In the reservoir

At the actuator

At the pumps

#176. Electrical heating devices

Consume little power

Are used for preventing ice on small areas (e.g. pitot head, windscreen only)

Are used for de-icing small areas

Can de-ice large areas because there is a large excess of electrical power available

#177. Reverse thrust lights come on when

Reverser doors are unlocked

When reverse power above idle is selected

When reverse thrust is selected in flight

When the doors move towards the stowed position inadvertently

#178. The magnetos are switched off and the engine continues to run normally .The cause of this fault is

A wire from the magneto coming in contact with the metal aircraft skin

Hotspots existing in cylinder

Carbon deposits on spark plug

Grounding wire from magneto being broken

#179. An aircraft is to fly at 29000ft. When should the oxygen briefing take place

Before 10000ft.

Before 14000ft.

At 20000ft.

Before take-off.

#180. What is the purpose of the magneto impulse coupling

To give a retarded spark during starting

Reduce the rate of rotation of the magneto

Advance the ignition and give a hotter spark during starting

Automatically increases spark rate at high engine speeds

#181. The excess cabin altitude alerting system must operate to warn the crew at8,000ft

8,000ft

10,000ft

13,000ft

14,000ft

#182. The ‘torsion box’ of a modern aircraft wing structure consists of:

Spars, skin, frames and stringers

Spars, skin, frames and ribs

Spars, skin, longerons and ribs

Spars, skin, stringers and ribs

#183. A device in a hydraulic system which acts in the same way as a diode in an electrical circuit is a:

Restrictor valve

Sequence valve

Fuse

One way check valve

#184. What does three green lights represent when the landing gear is selected down

The gear is down

The gear is down and locked

The gear and doors are down and locked

The gear is travelling between up and down

#185. Which is the correct statement regarding a large aircraft fitted with both inboard and outboard ailerons.

The outboard ailerons are used only when the landing gear is selected down

The outboard ailerons are used only when the landing gear is retracted

The inboard ailerons are used only when the flaps are retracted

The inboard ailerons are only used when the flaps are extended

#186. How do differential ailerons work

Increase lift on down going wing and decrease lift on up going wing

Increase drag on up going wing and decrease drag on down going wing

Equalise the drag on up going and down going wings

Equalise the lift on up going and down going wings

#187. What is the effect of heating flight deck windows

To demist the interior of the window if normal demist does not function correctly

To protect the windows against bird strike

To protect the windows against ice formation

To protect the windows against bird strike and ice formation

#188. If an aircraft suffers decompression what happens to the indications on a cabin VSI, cabin altimeter and differential pressure gauge

VSI up, altimeter up, differential pressure gauge down

VSI, altimeter, differential pressure gauge all unchanged

VSI down, altimeter up, differential pressure gauge down

VSI up, altimeter down, differential pressure gauge down

#189. What happens if a gaseous oxygen cylinder is over pressurised

A pressure relief valve vents the excess pressure into the atmosphere

A bursting disc vents the complete contents of the cylinder(s) to atmosphere

A pressure regulator will prevent the excess pressure damaging the system

A pressure relief valve vents the excess pressure into the fuselage

#190. If a fuel sample appears cloudy, this is

An indication of air in the fuel

Normal

Due to the addition of FSII

An indication of water in the fuel

#191. Fuel tanks accumulate moisture, the most practical way to limit this in an aircraft flown daily is to:

Secure the filler cap tightly and plug the drains

Drain the tank at the end of each day

Fill the tank after each flight

Drain the water before flight

#192. How much fuel can be jettisoned

A specific amount

The captain decides

All

A specified amount must remain

#193. The DLL of a transport aircraft is

1.5g

2.5g

3.4g

3.75g

#194. A current limiter fuse

Will rupture below fault conditions

Has a high melting point so carrying a considerable current overload before rupturing

Is not used in TRU protection

Has a low melting point so will rupture quickly if a current overload occurs

#195. What type of electrical motor is used as a starter motor

Series

Shunt

Compound

Induction

#196. The power for LP fuel pumps is

28v DC

28v AC

115vDC

200vAC

#197. What is a relay

Solenoid valve

Magnetic switch

Converts electrical energy into heat energy

Used in starter motor circuit

#198. An aircraft is in straight and level flight at a constant cabin altitude when the crew notice the rate of climb indicator reads –200ft/min. What will be the sequence of events.

Crew should begin a climb to regain cabin altitude

Cabin altitude will increase to outside atmospheric pressure

Cabin altitude will descend to, and continue beyond normal max. diff., at which point the safety valves will open.

Cabin altitude will increase to, and continue beyond normal max. diff., at which point the safety valves will open.

#199. What is the frequency band for ADF

Hectometric

Metric

Centimetric

Decimetric

Dgca Question Bank For Pilots

Results

#1. The principle of operation of firewire is

#2. What type of fire extinguisher would be used on a propane fire?

#3. On what principle do smoke detectors work?

#4. An ion detector detects

#5. If an artificial feel unit were fitted it would be connected

#6. In a twin jet fuel system what is the function of a feeder box

#7. A twin jet aircraft would normally be refuelled by which of the following methods?

#8. The fuel tanks of a modern passenger airliner are filled by

#9. The purpose of a refuelling volumetric top off unit (VTO) is:

#10. Fuel tank booster pumps are: -

#11. The advantage of a float type fuel gauging system is 1. Simple 2. Compensates for variations of SG 3. Reads fuel quantity by mass 4. Compensates for change of aircraft attitude

#12. The function of the baffles in a fuel tank is

#13. The function of baffle check valves in a fuel tank is

#14. A magneto is switched off by

#15. An impulse coupling in a magneto is provided to

#16. A turbo-supercharger impeller is driven by

#17. A cylinder head temperature gauge measures

#18. EPR is measured by the ratio of

#19. Where is EGT measured

#20. In a bootstrap air conditioning system what is the first thing the air does?

#21. How are the loads on an aircraft busbar connected

#22. In a modern airliner what is hydraulic fluid used

#23. The minimum height for door sills before a means of assisting escape is required is

#24. How are escape slides inflated

#25. If an aircraft is 340 nm from land and its one engine inop speed is 150 kts

#26. The minimum number of fire extinguishers to be carried in the passenger cabin of an aircraft having 31 – 60 seats is

#27. The type of extinguishant to use on magnesium fires would be

#28. The correct extinguisher to use on a brake fire would be

#29. If an aircraft has a maximum seating configuration of less than 200 but more than 9 a crash axe or crowbar must be carried

#30. An aircraft is certified to carry a maximum of 240 passengers, it is configured to carry 200 and actually has 180 passengers on board. The minimum number of drop-down oxygen masks provided must be

#31. The passenger oxygen drop-down mask stowage doors are released

#32. In a centrifugal compressor

#33. What happens to pressure, temperature and velocity of the air in the diffuser of a centrifugal compressor

#34. The type of smoke detection system fitted to aircraft is

#35. The flight deck warning on activation of an engine fire detection system is

#36. Hydraulic reservoirs are pressurised by

#37. The purpose of a hydraulic fuse is to

#38. A shuttle valve will

#39. With regard to an air cycle type ECS pack, where is the water separator fitted

#40. In the event that an emergency decent causes the cabin pressure to decrease below ambient pressure

#41. The purpose of a ditching control valve is

#42. In a bleed air anti icing system the areas that are heated are

#43. On a modern turbo prop aircraft the method of anti-icing/de-icing the wings is?

#44. If an aircraft maximum operating altitude is limited by the pressure cabin, this limit is due to

#45. Long haul aircraft are not used as short haul aircraft because

#46. The properties of Duralumin are 1. Aluminium/copper base 2. Aluminium/magnesium base 3. Hard to weld 4. Easy to weld 5. Good thermal conductivity 6. Poor resistance to air corrosion

#47. An undercarriage leg is considered to be locked when:

#48. An underinflated tyre on a dry runway

#49. Kreuger flaps are positioned

#50. What are flaperons

#51. What is the purpose of inboard ailerons

#52. What is the purpose of trim tabs

#53. To reduce control effectiveness

#54. Oxygen supplied to the flight deck is

#55. If during pressurised flight the outflow valve closes fully due to a fault in the pressure controller the:

#56. In a fan jet engine the bypass ratio is

#57. The thrust reverser light illuminates on the flight deck annunciator when the

#58. In very cold weather the pilot notices slightly higher than normal oil pressure on start up. This:

#59. If a fuel tank having a capacitive contents gauging system is empty of fuel but has a quantity of water in it:

#60. In a four stroke engine, when the piston is at BDC at the end of the power stroke the position of the valves is Inlet Exhaust

#61. What is the effect on EGT and EPR if a bleed valve is opened?

#62. Where is torque measured in a turboprop engine

#63. Propeller blade angle is

#64. Why is a propeller blade twisted

#65. For calculating resistances in parallel the formula is

#66. When a fuse operates it is __________And when a circuit breaker operates it is_________

#67. A hot busbar is one that

#68. In an AC distribution system what is the purpose of the GCB

#69. An aircraft which uses DC as the primary source of power, AC for the instruments may be obtained from:

#70. Persistent over excitation of one generator field will cause:

#71. When a battery is nearly discharged, does the

#72. The state of charge of an aircraft battery on an aircraft with a voltmeter would be checked

#73. In a paralleled AC distribution system what regulates the real load

#74. If the oil temperature gauge of the CSD is in the red what would action is required

#75. What is a transistorised static inverter in a DC circuit used for

#76. If the load increases on a ‘constant speed AC generator’ what does the voltage regulator do

#77. Incorrect bonding of the aircraft structure could cause

#78. The characteristics of a Unipole system are 1. Lighter 2. Easier fault finding 3. More likely to short circuit 4. Less likely to short circuit 5. It is not a single wire system

#66. When a fuse operates it is __And when a circuit breaker operates it is_