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

Chapter 3 - Flight Deck Fuel Systems Flashcards

(74 cards)

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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
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?
Fueling valve: spring loaded closed | Defueling valve: held open by its own weight
26
Spring action holds which valve open?
Pressure reducing control valve
27
What does the ejector strainer consist of?
Orifice plug | 60 mesh Monel screen
28
How can the SOPV be operated manually?
Push upward on button at the lower end of the control
29
How can you lock the manual operated in place?
1:4 turn clockwise
30
What is the SOPV housed in?
Explosion proof case
31
The flow control valve consists of what?
Needle valve with a spring | Disk assembly
32
Flow control valve is installed between what?
Ejector strainer | Fuel valve
33
When is SOPV deenergized ?
During defuel
34
What are two probable causes if the fueling valve fails to open?
SOPV not operating properly | Hytrol failed to open
35
What are two probable causes if the fueling valve fails to close?
SOPV not operating properly | Ejector strainer clogged
36
What are two probable causes if the fueling valve fails to maintain designed delivery pressure?
Pressure reducing valve not operating properly. | Fueling valve diaphragm ruptured.
37
The male end of the nozzle adaptor provides a means of installing what?
100-mesh Monel screen
38
The strainer on the nozzle adapter is held in place by what?
Snap ring
39
What provides a means of attaching fuel nozzle to hose?
Quick disconnect coupling
40
Quick disconnect coupling contains which switch?
SOPV
41
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?
Female ball bearing quick release
42
What part of the pressure-refueling nozzle houses the operating linkage?
Body
43
What does HEPCV stand for?
Hose-end pressure control valve
44
What nozzle is primarily used for on JP-5 fueling of aircraft?
Single point refueling (SPR)
45
The sample connection on the SPR are what type?
Flush type | Dry break disconnect type
46
Non-swivel type nozzles utilize what typed of couplers ?
Gammon technical products (GTP)
47
Swivel type nozzles utilize what type of couplers?
GTP-national pipe thread (NPT)
48
What nozzle is designed for high capacity fueling operations?
SPR pressure-fueling
49
Who are manufacturers of the most widely used pressure fueling nozzles?
J C Carter | Whittaker
50
What is the Internal difference between the D-1 and D-1R type nozzles?
D-1: body and collar are one unit | D-1R: swivels independent of body
51
What four parts make up the D-1 nozzle?
Collar assembly Nose seal assembly Body Operating linkage
52
What does the collar assembly on the D-1 nozzle do?
Holds dust cover and bumper
53
What attaches the collar of D-1 nozzle to the body?
49 ball bearings
54
What does the nose seal assembly on the D-1 nozzle do?
Acts like an modified o-ring (to seal the nozzle and the aircraft refueling connection )
55
What is the nose seal assembly on the D-1 nozzle made of?
Aluminum
56
What does the nose seal assembly on the D-1 nozzle provide housing for?
Fuel resistant o-ring | Poppet
57
What does the body on the D-1 nozzle do?
Housing for actuating linkage
58
What does the actuating linkage on the D-1 nozzle consist of?
Indexing pins Collar lock pin Collar lock pin spring
59
What two connections does the body on the D-1 nozzle have?
Connection for sampling | Connection for operating lever
60
What connects the body to the inlet elbow?
39 bearings
61
What does the valve operating linkage on the D-1 nozzle do?
Connects operating lever to poppet
62
What is the poppet on the D-1 nozzle made of?
DuPont's Teflon-coated cast aluminum
63
Which pressure-fueling nozzle is constructed with HEPCV as an integral component of the unit?
D-1R nozzle
64
Which pressure-fueling nozzle is the standard nozzle?
D-1 nozzle
65
An overwing nozzle also is also referred to as..
"Gravity" or "open" port nozzle
66
What two gravity nozzles are used for designated shipboard JP-5 aux fueling?
MD-3 | OPW (Ohio pattern works)
67
What size strainer does the MD-3 Gravity nozzle come equipped with?
60-mesh strainer
68
What size strainer does the OPW Gravity nozzle come equipped with?
100-mesh strainer
69
The OPW nozzle can receive what size hose?
3/4 inch
70
Which gravity nozzle is provided with 1 1/2 inch x 2 inch bushing that screws into nozzles inlet?
MD-3
71
In a swing joint hose real, what device connects the continuity wire to the spider assembly?
An amphonel stud
72
What device prevents a hose reel from moving when it is not in use?
Manual brake
73
What's is the swing joint hose reel made of ? Why?
Brass. | To prevent corrosion.
74
What does the pressure reducing valve regulate ?
Delivery pressure

Navedtra 14322A (1 decks)

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