This quiz assesses knowledge in the operation and maintenance of hydrant systems within the Air Force, focusing on control mechanisms, system diagnostics, and troubleshooting common issues. It is essential for personnel involved in direct fuel handling and infrastructure maintenance.
Hand/off
Hand/auto
Hand/off/auto
Hand/off/manual
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Electrical shorts
No fuel delivery
Minor leaks
Jammed valves
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Tin
Black steel
Cast iron
Galvanized/Stainless steel
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Pressure to operate the CDHS-2
Pressure to operate the CDHS-3
Flow to operate the CDHS-2
Flow to operate the CDHS-3
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When it is not used in 30 days
Before servicing an aircraft
After defueling an aircraft
After servicing an aircraft
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Light test
Fire alarm
System reset
Emergency stop
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An uncontrolled downstream flow
A fuel leakage from the vent port
Uncontrolled downstream pressure
Fuel leaking from the disc removal plug
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Pulsates
Modulates
Opens fully
Closes fully
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System pressure and issue flow rate
System pressure and issue/return flow rates
Issue/return flow rates and tank liquid level
Filter/separator differential pressure and tank liquid level
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The next pump in the predetermined sequence is called on
Only the lead and second pump continue to run
An alarm will sound and the entire system shuts down
A light in the pumphouse illuminates and a vibrating horn sounds
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1
2
3
4
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CRD
CDHS-3
Loaded CRL
CV flow control
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A and B close
A and B open
A opens and B closes
A closes and B opens
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Contacts
Timer
Output
Counter
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The coupling poppet
The vacuum breaker
The flange gasket
The solenoid
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1
2
3
4
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Deep well turbine pumps, 600 gallons per minute (gpm)
Deep well turbine pumps, 1200 gpm
Horizontal centrifugal pumps, 600 gpm
Horizontal centrifugal pumps, 1200 gpm
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Solenoid control switch
Pump circuit breaker
Vacuum control switch
Panel selector switch
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15 days maximum
30 days minimum
45 days maximum
60 days minimum
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Leakage through normally open solenoid valve
Leakage through normally closed solenoid valve
Leakage through solenoid valve during slow flow
Check valve installed backwards
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65
70
75
80
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National Fire Protection Agency 70
Major command fuels engineer
American Petroleum Institute
National Society of Engineers
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The fourth pump is called on
The fourth pump is called off
The four pumps are called on
The four pumps continue to run
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"Flush" and all available pump switches to "hand"
"Automatic" and all available pump switches to "hand"
"Flush" and half the available pump switches to "hand"
"Automatic" and half the available pump switches to "hand"
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The receiving line
The pump suction line
The pump discharge and fueling loop
The system refueling loop return line
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Copper
Carbon
Galvanized
Stainless Steel
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On top of the tank in the float well
On top of the tank in the gauging well
On the exterior side of the tank at the required shut-off height
On the interior side of the tank at the require shut-off height
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Division I, Group C
Division I, Group D
Division II, Group C
Division II, Group D
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4 mA
8 mA
12 mA
20 mA
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Remote-sensing pressure reducing control
Control valve flow control valve
Hydraulic deadman
The pneumatic deadman
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Fueling pumps are started manually
Fueling pumps started automatically
System is placed in the flush mode
System is placed in the automatic mode
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Refueling control valve and defueling valve are energized
Defueling control valve and the defueling pump are energized
Rate-of-flow control valve and defuel pump are energized
Defueling control valve and deep-well turbine pumps are energized
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5 pounds per square inch (psi) higher than the normal operating pressure
5 psi higher than the inlet pressure of the 90AF-8
5 psi higher than the 51AF-4
5 higher than the normal inlet pressure of the 51AF-4
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Auxiliary hytrol A closing
CDHS-3 tripping
Solenoid never energizing
Pressure relief control set too high
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Only the primary jet
Only the secondary jet
The primary and secondary jets
Neither the primary nor the secondary jets
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Keep moisture out of the system
Prevent corrosion in the piping system
Keep the fuel pressure from getting too high
Prevent air from entering the installed piping system
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1/2-inch
1-inch
1 1/2-inch
2-inch
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600
800
1200
2400
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Manual and push the SYSTEM STOP button
Manual and push the SYSTEM START button
Automatic and push the SYSTEM STOP button
Automatic and push the SYSTEM START button
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40
60
80
100
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Ejector strainer
CV flow control
Pressure relief control
Pressure-reducing control
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Placing the magnet on the refuel magnetic control station switch
Placing the cover back on the emergency switch
Manually resetting the controls in the lateral control pit
Manually resetting the controls in the pumphouse control room
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80 at the nearest hydrant outlet
80 at the farthest hydrant outlet
100 at the nearest hydrant outlet
100 at the farthest hydrant outlet
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The 50AF-2 valve does not open
Hydrant pressure becomes very high
The defuel pump rotates slowly during refueling
The refueling valve opens and clsoes
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The 302AF electrical solenoid only
The deep-well pump only
The 302AF solenoid and the defueling pump
The deep-well turbine pump and the 302AF electrical solenoid
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By a flashing PCP and vibrating horn sounds
By an illuminating PCP and vibrating horn sounds
By a flashing PCP and resonating horn sounds
By an illuminating PCP and resonating horn sounds
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2,000 gallons
3,000 gallons
4,000 gallons
5,000 gallons
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It closes only
It opens only
It reenergizes
It free floats
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Quiz Review Timeline (Updated): Mar 22, 2023 +
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