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Navedtra 14322A > Chapter 3 - Flight Deck Fuel Systems > Flashcards

Chapter 3 - Flight Deck Fuel Systems Flashcards

1
Q

What does SOPV stand for?

A

Solenoid operated pilot valve

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2
Q

What does the SOPV do?

A

Switches the main valve from defuel to fuel mode. Vice versa.

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3
Q

What should the CLA-VAL maintain a constant discharge pressure of?

A

Not to exceed 55 psi

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4
Q

What is the core of the JP-5 fueling station?

A

CLA-VAL

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5
Q

The CLA-VAL functions as what to maintain a constant discharge pressure ?

A

Pressure reducing valve

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6
Q

The CLA-VAL functions as what when it need to emergency shutoff?

A

Solenoid operated

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7
Q

The CLA-VAL functions as what when discharge pressure rises above a predetermined setting?

A

Pressure relief valve

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8
Q

The CLA-VAL functions as what to evacuate the piping and hose beyond the valve discharge?

A

Defueling valve

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9
Q

What valve is spring loaded to close?

A

Fueling valve

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10
Q

What valve is held open by its own weight ?

A

Defueling valve

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11
Q

The fuel and defuel valves are controlled by what?

A

Pressure acting on the diaphragm

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12
Q

What valve regulates the opening speed of the fueling side of the main valve?

A

Flow control valve

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13
Q

Which valve ISOLATES inlet pressure FROM the pressure reducing control valve?

A

Hytrol valve

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14
Q

Which valve VENTS inlet pressure TO the pressure reducing control valve and the fuel port of the main valve?

A

Hytrol valve

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15
Q

What does the ejector strained do?

A

Reduces inlet pressure

Filters fuel

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16
Q

The ejector strainer is located between what?

A

Inlet port and 3 discharge ports

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17
Q

What valve opens to shift to defueling mode if the delivery pressure exceeds the preset limit?

A

Pressure relief valves

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18
Q

Each pressure relief control valve contains what?

A

Stem
Diaphragm
Spring
Adjusting screw

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19
Q

The spring can be adjusted to provide a relief setting of what?

A

20-70 psi

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20
Q

What protects the adjusting screw on the pressure relief control valves?

A

Bronze housing

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21
Q

What is the pressure relief for the defuel valve set at?

A

7 1/2 above desired pressure

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22
Q

What is the pressure relief for the fuel valve set at?

A

2 1/2 above desired pressure

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23
Q

What is the physical difference between the pressure relief and pressure reducing?

A

Pressure relief has a body plug

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24
Q

What is the Hytrol directly connected to?

A

Pressure reducing valve

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25
Q

In the main valve, the fueling valve and defueling valve each uses a well-supported and reinforced diaphragm as its operating means. Normally each valve is in which position?

A

Fueling valve: spring loaded closed

Defueling valve: held open by its own weight

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26
Q

Spring action holds which valve open?

A

Pressure reducing control valve

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27
Q

What does the ejector strainer consist of?

A

Orifice plug

60 mesh Monel screen

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28
Q

How can the SOPV be operated manually?

A

Push upward on button at the lower end of the control

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29
Q

How can you lock the manual operated in place?

A

1:4 turn clockwise

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30
Q

What is the SOPV housed in?

A

Explosion proof case

31
Q

The flow control valve consists of what?

A

Needle valve with a spring

Disk assembly

32
Q

Flow control valve is installed between what?

A

Ejector strainer

Fuel valve

33
Q

When is SOPV deenergized ?

A

During defuel

34
Q

What are two probable causes if the fueling valve fails to open?

A

SOPV not operating properly

Hytrol failed to open

35
Q

What are two probable causes if the fueling valve fails to close?

A

SOPV not operating properly

Ejector strainer clogged

36
Q

What are two probable causes if the fueling valve fails to maintain designed delivery pressure?

A

Pressure reducing valve not operating properly.

Fueling valve diaphragm ruptured.

37
Q

The male end of the nozzle adaptor provides a means of installing what?

A

100-mesh Monel screen

38
Q

The strainer on the nozzle adapter is held in place by what?

A

Snap ring

39
Q

What provides a means of attaching fuel nozzle to hose?

A

Quick disconnect coupling

40
Q

Quick disconnect coupling contains which switch?

A

SOPV

41
Q

The quick disconnect has female threads on one end to accept the hose coupling. What device is used to connect the other end to the male end of the nozzle adaptor?

A

Female ball bearing quick release

42
Q

What part of the pressure-refueling nozzle houses the operating linkage?

A

Body

43
Q

What does HEPCV stand for?

A

Hose-end pressure control valve

44
Q

What nozzle is primarily used for on JP-5 fueling of aircraft?

A

Single point refueling (SPR)

45
Q

The sample connection on the SPR are what type?

A

Flush type

Dry break disconnect type

46
Q

Non-swivel type nozzles utilize what typed of couplers ?

A

Gammon technical products (GTP)

47
Q

Swivel type nozzles utilize what type of couplers?

A

GTP-national pipe thread (NPT)

48
Q

What nozzle is designed for high capacity fueling operations?

A

SPR pressure-fueling

49
Q

Who are manufacturers of the most widely used pressure fueling nozzles?

A

J C Carter

Whittaker

50
Q

What is the Internal difference between the D-1 and D-1R type nozzles?

A

D-1: body and collar are one unit

D-1R: swivels independent of body

51
Q

What four parts make up the D-1 nozzle?

A

Collar assembly
Nose seal assembly
Body
Operating linkage

52
Q

What does the collar assembly on the D-1 nozzle do?

A

Holds dust cover and bumper

53
Q

What attaches the collar of D-1 nozzle to the body?

A

49 ball bearings

54
Q

What does the nose seal assembly on the D-1 nozzle do?

A

Acts like an modified o-ring (to seal the nozzle and the aircraft refueling connection )

55
Q

What is the nose seal assembly on the D-1 nozzle made of?

A

Aluminum

56
Q

What does the nose seal assembly on the D-1 nozzle provide housing for?

A

Fuel resistant o-ring

Poppet

57
Q

What does the body on the D-1 nozzle do?

A

Housing for actuating linkage

58
Q

What does the actuating linkage on the D-1 nozzle consist of?

A

Indexing pins
Collar lock pin
Collar lock pin spring

59
Q

What two connections does the body on the D-1 nozzle have?

A

Connection for sampling

Connection for operating lever

60
Q

What connects the body to the inlet elbow?

A

39 bearings

61
Q

What does the valve operating linkage on the D-1 nozzle do?

A

Connects operating lever to poppet

62
Q

What is the poppet on the D-1 nozzle made of?

A

DuPont’s Teflon-coated cast aluminum

63
Q

Which pressure-fueling nozzle is constructed with HEPCV as an integral component of the unit?

A

D-1R nozzle

64
Q

Which pressure-fueling nozzle is the standard nozzle?

A

D-1 nozzle

65
Q

An overwing nozzle also is also referred to as..

A

“Gravity” or “open” port nozzle

66
Q

What two gravity nozzles are used for designated shipboard JP-5 aux fueling?

A

MD-3

OPW (Ohio pattern works)

67
Q

What size strainer does the MD-3 Gravity nozzle come equipped with?

A

60-mesh strainer

68
Q

What size strainer does the OPW Gravity nozzle come equipped with?

A

100-mesh strainer

69
Q

The OPW nozzle can receive what size hose?

A

3/4 inch

70
Q

Which gravity nozzle is provided with 1 1/2 inch x 2 inch bushing that screws into nozzles inlet?

A

MD-3

71
Q

In a swing joint hose real, what device connects the continuity wire to the spider assembly?

A

An amphonel stud

72
Q

What device prevents a hose reel from moving when it is not in use?

A

Manual brake

73
Q

What’s is the swing joint hose reel made of ? Why?

A

Brass.

To prevent corrosion.

74
Q

What does the pressure reducing valve regulate ?

A

Delivery pressure

Navedtra 14322A (1 decks)

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