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Airframe > Fuel Systems > Flashcards

Fuel Systems Flashcards

1
Q

What are the fuel flow requirements for gravity feed fuel systems?

A

At least 150% of the takeoff fuel consumption

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2
Q

What are the fuel flow requirements for pressure pump fuel systems?

A

At least 125% of takeoff fuel flow

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3
Q

What are the required placards for recip. engines?

A

Avgas and minimum fuel grade

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4
Q

What are four types of fuel tanks?

A

Integral, Rigid removable, Bladder, Surge

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5
Q

Why are baffles installed in integral tanks?

A

To prevent sloshing of the fuel and fuel surging

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6
Q

Which tank is formed by the aircrafts structure?

A

Integral

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7
Q

What is the purpose of check/flapped valves?

A

To prevent fuel from flowing away from the boost pump

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8
Q

What are surge tanks designed for?

A

To contain fuel overflow and spillage

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9
Q

Drip sticks are used to measure what?

A

The amount of fuel in the tank

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10
Q

Why are centrifugal pumps used?

A

To prevent vapor lock in fuel lines at high altitudes

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11
Q

How does a jet pump operate?

A

Using the venturi principal
Has no moving parts

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12
Q

Where is the master strainer located?

A

At the lowest point of the system

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13
Q

What does an electronic fuel quantity indicator consist of? How many moving parts does it have?

A

A bridgecircuit, amplifier, indicator, and a tank unit
Has no moving parts in the tank

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14
Q

What is the advantage of pressure fueling?

A

Allows all tanks to be filled From a Single point

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15
Q

Where should defueling be accomplished? Which tanks should be defueled first?

A

Outside. Outboard wing tanks first

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16
Q

What is a cross feed system?

A

Any tank can supply any engine

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17
Q

What is the purpose of a fuel jettisoning system and how does it work?

A

To quickly lower landing weight by dumping fuel overboard

18
Q

How are fuel tanks cleaned?

A

Washed out with hot water and a detergent, then Steam cleaned

19
Q

What is used to purge fuel tanks?

A

Carbon Dioxide

20
Q

What are the four classifications of fuel leaks?

A

Stain, Seep, heavy seep, running leak

21
Q

What is Reid vapor pressure?

A

Amount of pressure required on a liquid to keep it from vaporizing

22
Q

What is the name of the fuel additive that improves performance?

A

Tetraethyl Lead (TEL)

23
Q

What is the name of the fuel additive that removes lead?

A

Ethylene Dibromide

24
Q

What has a strong swelling action on rubber hoses and parts?

A

Aeromatics

25
Q

What are aviation fuels rated with?

A

A performance number

26
Q

What should be done if the required grade fuel is not available?

A

Use the next higher grade

27
Q

What are 2 problems associated with 100LL fuel?

A

-Lead fouling of spark plugs
-Hot spots which can lead to pre-ignition

28
Q

For transport category aircraft, it is required that each fuel system have at least _____% of the fuel flow under each intended operating condition and maneuver.

A

100%

29
Q

What prevents exhaustion of the tank by giving a positive indication that a change of tanks is needed?

A

Fuel Pressure Indicators

30
Q

When using fuel pressure indicators, the transmitter converts fluid pressure into what?

A

An electrical signal

31
Q

What is used to determine when there is danger of ice crystals forming in the fuel?

A

Fuel Temperature Indicator

32
Q

Metal tanks must withstand an internal test pressure of what?

A

3.5 PSI

33
Q

Tanks must have an expansion space not less than ____% of the tank capacity.

A

2%

34
Q

What type of tank must be supported by the structure and not the fuel load?

A

Bladder

35
Q

What must be maintained in the vapor space inside of the bladder tanks?

A

Positive Pressure

36
Q

Fuel tanks must not be installed where?

A

On the engine side of the firewall

37
Q

Integral tanks in a wing are said be what?

A

A Wet Wing

38
Q

How are bladder tanks held in place?

A

Buttons or Snaps

39
Q

Fuel systems are required to have fuel strainers and filters. TRUE or FALSE?

A

TRUE

40
Q

What are 4 general types of fuel quantity indicators?

A

-Sight glass
-Mechanical
-Electrical
-Electronic

Airframe (7 decks)

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