FUEL SYSTEM – Air – DGCA Question Bank For Politics

#1. Baffles are fitted in aircraft fuel tanks:

to assist in correct fuel distribution.

to prevent fuel surging during aircraft manoeuvres.

to channel fuel to the vent valve.

#2. A power failure to a capacitive fuel contents system would cause the gauge to:

show full scale deflection high.

fluctuate between high and low readings.

remain fixed on the last contents noted before failure.

show full scale deflection low.

#3. A fuel booster pump, besides pumping fuel to the engine, can also be utilised to:

jettison and transfer fuel.

jettison and heat the fuel.

transfer and heat the fuel.

transfer and recycle the fuel.

#4. During fuel jettison, the aircraft is protected against running out of fuel by:

high level float switches.

preset jettison quantity switches.

the crew remaining alert.

low level float switches.

#5. To indicate that a refueling bowser carries JET A1 aviation kerosene:

yellow and black stripes are marked on the refueling hose.

JET A1 would be painted in 30cm high symbols on the side of the container.

JET A1 is printed in white on a black background label positioned prominently on the vehicle.

the driver wears a straw yellow water and fuel proof jacket.

#6. Adjustments may have to made to an aircraft’s engine fuel system if it has been refueled with JET B instead of its normal JET A1 fuel, these adjustments are to cater for:

the change in the specific gravity of the fuel.

the change in the calorific value of the fuel.

the change in the viscosity of the fuel.

the lack of HITEC lubricant in the fuel.

#7. The differences between AVGAS 100 and AVGAS 100LL are: Colour Anti-knock value

Same Same

Same Different

Different Same

Different Different

#8. The aircraft cannot be refueled while:

a ground power unit is operating on the ramp.

passengers are walking through the refueling zones.

passengers are boarding.

the A.P.U. is running.

#9. The disadvantage of refueling the aircraft to “tanks full” the night before a departure in the heat of the day is that:

the change in the volume of the fuel may cause it to spill through the vent system.

the change in calorific value may reduce engine power to below sufficient.

the R.P.M. governor will be rendered inoperative.

the change in the specific gravity may cause the aircraft to be overweight

#10. An aircraft using MOGAS:

is likely to be affected by detonation at cruise power.

must have booster pumps fitted in the fuel tanks.

is more likely to be affected by vapour locking and carburetor icing.

will suffer from a loss of power during take off.

#11. If a fuel sample appears cloudy or hazy, the most probable cause is:

water contamination.

anti-microbiological additives.

mixing different fuel grades.

oil in the fuel.

#12. On an aircraft equipped with a compensated capacitance type fuel quantity indication system graduated to read in kg, the temperature increases just after the tanks are half filled with fuel. If the fuel expands by 10%, the gauges will show:

an increase of 10%.

a decrease of 10% of the volume factored by the new specific gravity.

a decrease.

the same amount.

#13. The exhaust gases from the A.P.U. go into the refueling zone. The A.P.U:

must be switched OFF throughout the refueling operation.

can be started while refueling is carried out.

must be started before fuelling is carried out, and can be run throughout the refueling operation.

can be started only after the refueling operation has been terminated.

#14. De-fuelled fuel:

can only be used in domestic heating systems.

can only be used by aircraft from the same operators fleet.

must be put back into storage.

cannot be re-used until its quality has been verified.

#15. The background colour scheme for fuelling system pipelines carrying the following fuels is: JET A1 AVGAS

Red Black

Black Red

Red Yellow

Yellow Red

#16. AVGAS:

is coloured red for identification purposes.

is coloured green if it is a leaded fuel and blue if it is a low lead fuel.

has no artificial colouring and appears either clear or a straw yellow colour.

can only be used in piston engines if oil is added to improve its anti-knock properties.

#17. Information relating to the use of MOGAS can be found in:

C.A.A. General Aviation Safety Sense Leaflets.

Advisory Information Circulars.

Notams.

C.A.A. Airworthiness Publications.

#18. The fuel cross feed valves are fitted in order to facilitate:

the use of fuel from any tank to any engine.

refueling when only one bowser is in use.

isolation of the engine from the fuel system in the case of an engine fire.

transfer of fuel between the main fuel tanks.

#19. Refueling with passengers on board is not permissible:

on a fixed wing aircraft.

if AVGAS is being used.

if the aircraft has more than twenty seats and the ratio of cabin attendants to passengers is greater than 1:50 and it is a wide bodied jet.

in any of the above cases.

#20. While refueling with passengers on board, when a loading bridge is in use:

two sets of extra steps must be provided, one of which must be at the rear of the aircraft.

the rear left or right door must be manned constantly by a cabin attendant ready for use as an emergency exit using the inflatable escape slide.

ground servicing must not be carried out.

catering and cleaning must not be carried out.

#21. A “wide-cut” fuel is:

more flammable than a kerosene type fuel.

less volatile than a kerosene type fuel.

coloured red for identification purposes.

commonly used in civilian transport aircraft.

#22. The purpose of fitting baffles in fuel tanks is to:

prevent longitudinal movement of the fuel during acceleration.

allow the booster pump to remain covered by fuel irrespective of the aircraft attitude.

dampen lateral movement of the fuel in the wing tanks during a sideslip.

maintain a pre-determined quantity of fuel in the outboard section of the wing tank.s

#23. Fuel is heated:

to stop cavitation in the High Pressure Fuel Pump.

to maintain a constant viscosity.

to prevent water contamination.

to stop ice blocking the Low Pressure fuel filter.

#24. What is the function of a collector tank (feeder box):

prevent detonation during take off.

prevent cavitation of the booster pumps.

prevent fuel surge due to extreme aircraft attitude.

allow suction feeding of the engine pump.

#25. Fuel tank booster pumps are:

centrifugal, low pressure.

centrifugal, high pressure

gear type, low pressure

gear type, high pressure

#26. The advantage of a capacitor type fuel contents gauging system is that the circuit:

responds to changes in specific gravity.

compensates for high altitude flight.

responds automatically to extremely low temperatures.

compensates for aircraft attitude changes.

#27. The Low Pressure engine driven pump:

backs up in case the engine High Pressure Pump fails.

backs up in case of a double booster pump failure.

assists in the refueling operation if only low pressure refueling systems are available.

pressurises the fuel tanks to assist flow to the booster pumps.

#28. The purpose of the fuel cooled oil cooler is to:

heat the oil and cool the fuel.

heat the fuel and cool the oil.

cool the oil.

heat the fuel.

#29. If a fuel tank with a capacitive quantity system was filled with water instead of fuel, the gauge would indicate:

full scale low (zero).

it would indicate the same as if it were filled with fuel c. full scale high (max).

it would freeze at the last known indication.

#30. AVTUR or JET A1:

varies in colour between clear and straw yellow.

is a wide cut fuel which is not normally used in civilian transport aircraft.

is a gasoline type fuel with a high flash point.

is a 97 octane fuel which prevents detonation in gas turbine engines.

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