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2AX5X > Vol.3 > Flashcards

Vol.3 Flashcards

1
Q

What is usually located at the lowest point in a fuel tank?

A

Sump and drain

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2
Q

Why does a bladder-type tank conform to the shape of the vacant cavity within the fuselage?

A

Because it is made out of a rubber or nylon material

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3
Q

What are wing tanks?

A

Sealed-off parts of the wing structure

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4
Q

What may a centrifugal-type air fuel pump be used for?

A

Boost, transfer, or air refueling operations

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5
Q

What type of fuel pump must have a fuel and vapor proof housing?

A

Centrifugal pump with electrically driven, DC, series-wound motor

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6
Q

What kind of centrifugal pump is used when a fuel supply is required during periods of negative gravity conditions?

A

Dual-impeller

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7
Q

In a dual-impeller fuel pump, what prevents foreign objects from holding the bypass valve open?

A

An inlet screen

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8
Q

What air refueling pump components depend on fuel for lubrication?

A

Bearings

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9
Q

What air refueling pump component removes fuel vapors caused by the centrifugal force of the impellers?

A

rotor

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10
Q

What does the arrow stamped on the body of a fuel system check valve indicate?

A

direction of free flow

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11
Q

When is a pressure-loaded fuel system check valve used?

A

When gravity flow through the valve is undesirable

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12
Q

What are the fuel system components that prevent excessive pressure from building up in trapped lines or within the valve body?

A

three spring-loaded relief valves

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13
Q

The rotary plug valve can be removed and replaced without what?

A

Draining the fuel lines or tanks

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14
Q

What rotary plug valve part rotates and seals off the passage of fuel during plug valve removal?

A

Secondary seal sleeve

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15
Q

What is another name for the disc-type valve in a fuel system?

A

butterfly

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16
Q

In a piston-type fuel level control valve, what aids piston closure and prevents fuel from entering the tank?

A

Spring

17
Q

Why do some fuel level control valves have a dual-float system?

A

So that there will be a double safety factor

18
Q

The low-level shutoff valve prevents the reverse flow of fuel through the valve by what type of action?

A

Check valve

19
Q

What do fuel-controlled circuits normally indicate?

A

Fuel flow, fuel level, and fuel pressure

20
Q

What most likely controls the automatic pump shutoff when all fuel is depleted from a fuel tank?

A

Float switches

21
Q

In a DC, liquid-level , fuel indicating system, what positions the wiper contact on the resistance strip?

A

The movement of a float in the tanks

22
Q

What capacitance-type, fuel-indicating system component allows for changes in fuel density?

A

Compensator

23
Q

What prevents a fuel tank from collapsing if an air pressure regulator fails and excessive negative pressure develops?

A

Pressure/vacuum relief valve

24
Q

What will a well-designed aircraft fuel system ensure?

A

Positive and reliable fuel-flow under all conditions

25
Q

What are the three types of shutoff valves used in crossfeed fuel systems?

A

Sliding gate, rotary plug, and disc

26
Q

What are the three methods of transferring fuel?

A

Gravity flow, air pressure, and pump

27
Q

What is the basic purpose of the fuel vent system?

A

Prevent fuel tank rupture or collapse

28
Q

What is the most prevalent method of refueling for ground servicing?

A

Single-point

29
Q

How is the Air Refueling receptacle operated?

A

Hydraulically, but controlled electrically

30
Q

How will fuel’s ability to hold contaminants in suspension be increased?

A

With a higher viscosity

31
Q

What type of foreign particle appears in the fuel in a crystalline, granular, or glass-like form?

A

Sand or dust

32
Q

Which type of fuel contaminant can form a red, brown, gray, or black slime in the fuel?

A

Microbial growth

33
Q

Specks or granules of sediment in fuel that are visible to the naked eye are approximately how many microns or larger?

A

40

34
Q

Why is classification of fuel leaks necessary?

A

In order to determine whether or not they constitute a flight safety hazard

35
Q

How are fuel leaks categorized?

A

Class A through D

36
Q

What do leak limits correspond to?

A

Leak category and fuel type

37
Q

In addition to the AFTO Form 781A or AFTO Form 781K, what form must be used to document fuel leaks when automatic data systems are not available?

A

AFTO Form 427

2AX5X (13 decks)

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