1. Which type of fuel pump has an impeller fitted:- (a) the constant displacement pump.
(b) the variable displacement pump.
(c) the double acting displacement pump.
2. What will be the position of the camplate of a variable displacement pump if the interrupter blade in the kinetic spill valve completely separates the two opposing flows?
(a) Off load.
(b) On load.
(c) Intermediate load.
3. In a constant displacement type pump, how is maximum pressure controlled?
(a) By a servo valve.
(b) By a camplate.
(c) By a pressure relief valve.
4. In an engine fuel system, the component that meters and computes the correct fuel flow to the engines is the:-
(a) fuel pump.
1. Which sensor adjusts fuel flow in relation to temperature changes?
(a) The CDP limiter.
(b) The compressor inlet temperature sensor.
(c) The throttle valve.
2. In which ATA Maintenance Manual chapter will you find information on fuel control?
(a) Chapter 71.
(b) Chapter 36.
(c) Chapter 73.
3. Servo pressure operates certain components within the fuel control unit, one of these is the :-
(a) pilot valve.
(b) CDP limiter.
(c) compressor inlet temperature sensor.
4. The purpose of the throttle valve is to:-
(a) ensure that the correct amount of fuel is directed to the burners.
(b) allow servo pressure to the CIT sensor.
(c) direct unwanted fuel back to the high pressure boost pump.
1 . (b ) 2 . (c ) 3 . (a ) 4 . (a )
1. The electronic engine control system receives its electrical power from:-
(a) the aircraft's main generators.
(b) the battery supply.
(c) an independent power source.
2. The T2 electrical sensor provides an inlet temperature signal to the:-
(a) EEC computer.
(b) the thrust management computer.
(c) the fuel control unit.
3. The digital air data computer receives signals related to the:-
(a) fuel flow.
(b) ambient pressure.
(c) compressor discharge pressure.
4. The torque drive motor receives its signal from the:- (a) electronic engine control computer.
(b) thrust management computer.
(c) fuel control unit.
5. The digital air data computer provides signals to the :-
(a) fuel control unit.
(b) electronic engine control computer.
(c) flight deck instruments.
1 (c ) 2 (a ) 3 (b ) 4 (a ) 5 (b )
1. The flow meter indicates the:- (a) mass flow.
(b) fuel density.
(c) specific gravity.
2. A fuel filter light indicates:-
(a) a fuel filter by-pass condition.
(b) an oil cooler blockage.
(c) a blocked fuel filter.
3. The fuel filter differential switch senses:- (a) filter inlet pressure only.
(b) filter outlet pressure only.
(c) a combination of inlet and outlet pressures.
4. To prevent fuel loss from the system during a fuel filter change, the filter has a: -
(a) by-pass valve fitted.
(b) fuel shut-off valve fitted.
(c) non return valve in the fuel pump assembly.
1. (a) 2. (c) 3. (c) 4. (b)
1. Duplex nozzles have:-
(a) primary and secondary flow.
(b) secondary flow only.
(c) primary flow only.
2. The type of fuel flow associated with a 'tulip' spray is:- (a) low pressure flow.
(b) high pressure flow.
(c) intermediate pressure flow.
3. Some nozzles have an airflow directed across the fuel outlet, this is to:-
(a) help create a better spray pattern.
(b) cool the nozzle head.
(c) prevent carbon deposits forming.
4. Which nozzle type has tangential swirl ports?
(a) Duplex.
(b) Simplex.
(c) A combination of both.
In a typical flow divider, how is the fuel flow prevented from reaching the secondary manifold during start-up?
(a) By using a spring loaded pressurising valve.
(b) By incorporating a dump valve.
(c) By inclusion of a spring loaded filter assembly.
A secondary fuel flow manifold is required during:- (a) start-up.
(b) high power settings.
(c) low power settings.
1. Self-sustaining speed is:- (a) higher than ground idle.
(b) lower than ground idle.
(c) the same as ground idle.
2. Stopping the starting cycle may be achieved by closing the fuel cock and placing the ignition switch to:-
(a) stand by.
(b) off.
(c) flight.
3. In a triple spool engine, the compressor connected to the starter is the:-
(a) LP compressor.
(b) intermediate compressor.
(c) HP compressor.
4. As the cranking speed increases, the starter voltage:- (a) reduces.
(b) increases.
(c) remains unaffected.
5. Which starter is permanently coupled to the engine shaft?
(a) Current control direct drive.
(b) Sprag clutch type.
(c) Starter generator.
During starting, the igniter relays are energised by the:- (a) throttle ignition switch.
(b) battery earth.
(c) acceleration control unit.
The instrument used for checking the electrical resistance between the insulated terminal and the starter case is a:-
(a) 500 volt insulation tester.
(b) 250 volt insulation tester.
(c) bonding tester.
The acceptable resistance for a starter insulation check is:- (a) 50 fl.
(b) 500 ft.
(c) 500000 Q.
1 . (b ) 2 . (b ) 3 . (c ) 4 . (b ) 5 . (c ) 6 . (a ) 7 . (b ) 8 . (c )
1. When compared with an air turbine starter the electric starter:-
(a) is lighter.
(b) produces more torque.
(c) is heavier.
2. During a normal start, the starter is disengaged by the:- (a) aircrew.
(b) ground crew.
(c) sprag clutch assembly.
3. Air starter rotating parts are lubricated by:- (a) application of a grease gun.
(b) an oil reservoir.
(c) a drip feed wick.
4. The starter magnetic plug is combined with the:- (a) oil fill plug.
(b) level plug.
(c) drain plug.
5. The type of valve used for a start valve is a:- (a) butterfly valve.
(b) annular valve.
(c) gate valve.
When starting speed is reached, the earth for the start solenoid is broken by the:-
(a) overspeed switch.
(b) centrifugal cutout switch.
(c) engine start switch being released.
The starting air used in an air impingement starting system is directed directly onto the engine by the:-
(a) compressor.
(b) turbine.
(c) starter.
During an engine start the surge bleed valve will be :- (a) open.
(b) closed.
(c) modulating.
1 . (c ) 2 . (c ) 3 . (b ) 4 . (c ) 5 . (a ) 6 . (b ) 7 . (b )
IGNITION
1. Engine relight circuits are used for:
(a) engine starting.
(b) wet runway take offs.
(c) flame out situations.
2. A joule is a unit of:
(a) work done.
(b) energy.
(c) power.
3. A high energy ignition unit may be supplied by:
(a) a.c. power only.
(b) d.c. power only.
(c) a.c. or d.c. power.
4 . The safe waiting period after disconnecting the low tension supply before maintenance is :
(a) ten seconds.
(b) 1/2 minute.
(c) one minute.
5. Which type of HEIU has a trembler unit?
(a) A.C. type.
(b) D.C. type.
(c) Transistor type.
6. One of the advantages of a transistorised HEIU is that it:- (a) has no moving parts.
(b) is fitted with a small trembler.
(c) produces a higher voltage than the a.c. and d.c. type.
7. Fouling of an igniter plug is minimised by:
(a) cleaning nozzle airflows.
(b) the fuel.
(c) the intensity of the spark.
8. The igniter plug sometimes referred to as the long reach igniter plug is the:
(a) annular-gap igniter.
(b) bi-annular-gap igniter.
(c) constrained-gap igniter.
.1 (c) .2 (b) .3 (c) .4 (c)
.5 ( b)
.6 ( a)
.7 (c) .8 (a)