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Aircraft General Knowledge > Piston Fuel Systems > Flashcards

Piston Fuel Systems Flashcards

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1
Q

Jet A and jet A1 have the same flash point. Whats the freezing point of Jet A1?

A

-47

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2
Q

Jet A and jet A1 have the same flash point. Whats the freezing point of Jet A?

A

-40

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3
Q

Jet A and jet A1 have the same flash point. What is it?

A

38’

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4
Q

Whats the freezing point of jet B?

A

-60’

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5
Q

The higher the octane rating the higher/lower the pressure can be in the cylinder?

A

Higher.

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6
Q

How many degrees before top dead centre does the spark plugs ignite?

A

23’

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7
Q

Is lean or rich likely to cause detonation?

A

Rich

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8
Q

On a multi-engine piston aircraft, one of the features of a pressure-fed fuel system is the capability to do what? To feed fuel from blank to blank.

A

To feed fuel from any fuel tank to any engine.

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9
Q

The XXX is the boundary between the aircraft fuel system and the engine
fuel system

A

EDP engine driven pump.

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10
Q

When do we use wing fuel?

A

Take off and landing.

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11
Q

What is the fuel tank at the end of a wing called?

A

Vent/surge tank.

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12
Q

Whats the refuelling pressure in jet aircraft?

A

50psi

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13
Q

What is the downside of mogas?

A

Most likely to cause carboreta icing

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14
Q

Light aircraft may have blank fuel caps.

A

Vented

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15
Q

What drives the engine driven pump in a piston engine?

A

Crankshaft,

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16
Q

When is the auxiliary fuel pump used in a piston aircraft?

A

Critical phases of flight.

17
Q

When can you turn off the auxiliary fuel pump?

A

Cruise

18
Q

When is the engine driven pump on?

A

When ever the engines on because its driven by the crank shaft

19
Q

What dies the change over valve do?

A

Choose which fuel tank.

20
Q

Fuel quantity can be measured by:

  1. Measuring volume by varying a resistance by a float
  2. Measuring mass or weight by varying capacitance
A

Correct.

21
Q

The drain valve on an aircraft fuel system is used…

A

To take a fuel samplw

22
Q

One advantage in the design of integral fuel tanks over other types of fuel tank is that they…provide the highest blank of fuel storage space.

A

Volume

23
Q

What causes vapour lock?

A

Heating causing fuel vaporisation.

24
Q

What design feature should a gravity fed fuel system include? The fuel tank(s) positioned above the blank.

A

Carborretta.

25
Q

You lose fuel indication during a flight, Pull and reset the blanks.

A

Pull and reset the circuit breakers

26
Q

What does the capacitance fuel sensor measure?

A

Mass

27
Q

The main task of the fuel system is to ensure that 100% of the fuel flow required in xxxxx is provided.

A

Critical phases of flight

28
Q

Capacitance fuel sensors measure fuel mass using electricity using blank.

A

Resistance,

29
Q

What are the disadvantages of bladder tanks in comparison to drum tanks? Wrinkles at the bottom can cause part of the fuel to be blank.

A

Unusable.

30
Q

Using a capacitance fuel sensor, as fuel level is increased, what happens to the resistance?

A

Decreases.

31
Q

What is the purpose of having a vent in a fuel filler cap?

A

Allow atmospheric pressure and prevent vacuum.

32
Q

What are the advantages of a pressure feed fuel system? More consistent blank.

A

Fuel flow

33
Q

What is a fuel sock?

A

Absorbed oxygen so fuel tanks become a nitrogen rich environment.

34
Q

Which of the following is a main task of a fuel system : optimization of centre of gravity or power in house electrical equipment

A

optimization of centre of gravity

35
Q

The safest method to prime a piston engine aircraft before starting is by injecting fuel into the blank.

A

Inlet manifold.

36
Q

What do hydraulic hoses do?

A

Heat up the fuel tanks

37
Q

Fuel return from the IDG is used for what?

A

Heating fuel.

38
Q

What is the target temperature of fuel ?

A

19’

Aircraft General Knowledge (49 decks)

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