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Fuel Tanks, Fuel Systems... > Fuel Tanks, Fuel Systems > Flashcards

Fuel Tanks, Fuel Systems Flashcards

0
Q

Can a pump draw fuel from more than one tank at a time?

A

No.

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1
Q

What parts of 14 CFR define the airworthiness standards for the design and construction of aircraft?

A

Parts 23, 25, 27, 29, 31.

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2
Q

What is meant by “Critical Temperature” when talking about vapor formation?

A

The temperature at which the fuel turns to vapor.

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3
Q

Does the fuel quantity indicator need to be adjusted to account for unusable fuel?

A

Yes.

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4
Q

Do all fuel filling points need to have a provision for electrically bonding the aircraft to the fueling equipment? What are the exceptions?

A

Yes, except pressure fueling connection points.

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5
Q

What is the requirement for the airspace of tanks of they have interconnected outlets?

A

The airspaces of the tanks must also be interconnected.

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6
Q

Do aircraft engines require dedicated fuel pumps for each engine?

A

Yes.

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7
Q

What is sometimes used to prevent fuel from shifting rapidly during flight maneuvers?

A

Internal baffles

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8
Q

When installing a bladder type fuel tank, what is important to ensure about the bottom of the tank and why?

A

That there are no wrinkles on the bottom.

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9
Q

What three ways are fuel valves operated?

A

Manually, solenoid, electric motor.

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10
Q

All aircraft valves have a means to positively identify the position of the valve at all times.

A

True!

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11
Q

What are the two most common electric motor operated fuel valves?

A

Gate valve, plug type.

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12
Q

What is the other means to operate electrically a remotely located fuel valve?

A

Through the use of electric solenoids.

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13
Q

How is the flow of fuel regulated in most vane pumps?

A

Most vane pumps have an adjustable pressure relief feature.

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14
Q

If a vane type pump gets blocked, what is used to allow fuel to flow through the pump?

A

Relief valve.

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15
Q

Where is the main fuel strainer normally located?

A

At the lowest point the system.

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16
Q

What is a gascolator?

A

A fuel strainer, or filter, that also incorporates a sediment collection bowl.

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17
Q

Why is it imperative that jet fuel be clean and contaminant free?

A

Because turbine engine fuel control units are extremely close tolerance devices.

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18
Q

What does an air/fuel heater use to heat the fuel?

A

Warm compressor bleed air.

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19
Q

What does an oil/fuel heater use to heat the fuel and what else does it do as it heats the fuel?

A

It uses hot engine oil to heat the fuel, it cools the oil as well.

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20
Q

What are the five parts of an electronic fuel quantity system?

A 
Transmitter
Probe
Trimmer
Microchip
Precalibrated quantity indicator
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21
Q

What are the five sub systems of jet transport fuel systems?

A

Storage, vent, distribution, feed, indicating.

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22
Q

What is the purpose of surge ranks on jet transport aircraft?

A

They are used for fuel overflow and fuel system venting.

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23
Q

How is the venting requirement on jet transport aircraft accomplished?

A

Check valves, float valves, multiple vent locations.

24
Q

What are the four basic classifications used to describe fuel leaks?

A

Stain, seep, heavy seep, running leak.

25
Q

What are the steps to troubleshooting?

A

Gather as much information about the problem as possible,
Replicate the problem
Understand the proper operation of the system
Determine all possible causes of the problem
Work from simplest/cheapest to most complex/expensive.

26
Q

Where do you go to find out what must be inspected?

A

14 CFR 43 Appendix D
AC 43.13
Latest version of the aircraft service manual

27
Q

What are the different types of inspections?

A 
Pre flight
50 hour
100 hour
Annual
Progressive
28
Q

What are the different kinds of leaks?

A

Stain, seep, heavy seep, running leak.

29
Q

Where are locations to look for probable leaks?

A

Around seams and joints,
Around fluid lines and fittings,
Around the area of seals and gaskets.

30
Q

What types of contaminants are there?

A

Solid contaminants
Water
Microorganisms
Surfactants

31
Q

What are ways of detecting contaminants?

A

White bucket test, millipore test.

32
Q

What are parts are involved in component operation?

A

Boost pump, selector valve, primer.

33
Q

What must be done to repair minor leaks in rigid tanks?

A

Minor leaks can be repaired by sloshing.

34
Q

How might one repair major leaks in a rigid tank?

A

Welding or soldering

35
Q

What must be done before a tank can be soldered or welded?

A

It must be purged.

36
Q

Where do most bladder tank problems arise from?

A

Allowing the tank to sit dry for too long.

37
Q

How do you repair bladder tanks?

A

Bladder tanks have a finite life, but localized leaks can be repaired with a rubberized patch.

38
Q

Where do fluid lines usually leak?

A

Where the line goes through a bulkhead or rubs another component.

39
Q

What should not be done when trying to eliminate leakage in a line?

A

Over tightening the fittings.

40
Q

Where should Teflon taps not be used?

A

On flared fittings

41
Q

What should be checked on the fuel selector?

A

Check to confirm the fuel is being shut off when the selector is in the off position.

42
Q

What is Avgas grade based on?

A

Octane eating content

43
Q

What is volatility?

A

A measure of a liquids tendency to change into a gas.

44
Q

What colour is 82UL octane marked as?

A

Purple

45
Q

What is 100 octane rated as?

A

Green

46
Q

What is 100 low lead ( 100LL) marked as?

A

Blue

47
Q

What is detonation?

A

When fuel burns violently, instead of smoothly and evenly.

48
Q

What is pre ignition?

A

Early ignition of the fuel/air mixture caused by a hotspot in the cylinder.

49
Q

The higher the vapor pressure is, the higher the ________?

A

Volatility

50
Q

What is Jet A?

A

Pure, highly refined kerosene

51
Q

What is Jet B?

A

A mixture of kerosene and gasoline.

52
Q

What is viscosity?

A

Internal resistance to flow

53
Q

What is microbial growth?

A

Hydrocarbons in turbine fuel

54
Q

What are two methods of fueling?

A

Over the wing

Single point

55
Q

What are methods of defueling?

A

Single point
Siphon
Drain

56
Q

What is “fuel transfer process”?

A

The ability of the crew to move fuel from one tank to another by means of valves and pumps .

57
Q

Gravity fed systems are used in what type of aircraft?

A

High wing aircraft with fuel tanks above the engine.

Fuel Tanks, Fuel Systems... (2 decks)

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