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WFSM - Set B (Volume 3) Questions with Detailed
Verified Answers
What are the positions of the pump control switch?
A.) HAND/OFF
B.) HAND/AUTO
C.) HAND/OFF/AUTO
D.) HAND/OFF/MANUAL Ans: ✓ ✓ ✓ C.) HAND/OFF/AUTO
The graphic display on the type 3 pump control panel is a single line
A.) diagram of the electrical wiring
B.) diagram of the pump control system
C.) mechanical diagram of the type 2 system
D.) mechanical diagram of the type 3 system Ans: ✓ ✓ ✓ D.) mechanical diagram of the type 3
system
Most emergency service calls involve
A.) electrical shorts
B.) no fuel delivery
C.) minor leaks
D.) jammed valves Ans: ✓ ✓ ✓ B.) no fuel delivery
The pump is running, but no fuel is delivered. What is your first step in diagnosing the problem
A.) check the pump
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B.) check all valves
C.) review the as-built drawing
D.) check the fuel storage tank Ans: ✓ ✓ ✓ C.) Review the as-built drawing
In the modified Panera system, how many tanks are used for defueling aircraft?
A.) 1
B.) 3
C.) 5
D.) 7 Ans: ✓ ✓ ✓ A.) 1
The u bend in the panel hydrant system pit defuel line
A.) allows the line to expand
B.) absorbs the hydronic shock
C.) keeps a portion of the Line and meter from draining
D.) provides a place for priming the pump Ans: ✓ ✓ ✓ C.) keeps a portion of the line and meter
from draining
How many hydrant outlets are served by each Panero pit?
A.) 1
B.) 2
C.) 3
D.) 4 Ans: ✓ ✓ ✓ A.) 1
When operating normally what part of the 302AF fueling/defueling valve restricts the flow of fuel in
the control tubing and will not close
A.) ejector strainer
B.) control valve flow control
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C.) pressure relief control (CRL)
D.) pressure reducing control (CRD) Ans: ✓ ✓ ✓ D.) Pressure reducing control (CRD)
Which component closes the main valve of the 302AF refueling/defueling valve when there is
excess flow at the hydrant outlet?
A.) Pressure-reducing control (CRD)
B.) Pressure-differential shutoff (CDHS-3)
C.) Loading pressure-relief control (CRL)
D.) Control valve (CV) flow control Ans: ✓ ✓ ✓ B.) pressure differential shutoff (CDHS-3)
When the CDHS-3 on the 302AF fueling and defueling valve trips pressure in the common supply
line travels through the solenoid and goes
A.) directly to the refueling section of the valve
B.) directly to the diaphragm chamber of the auxiliary Hytrol valve
C.) through the CDHS-3 to the refueling section if the valve
D.) through the CDHS-3 to the auxiliary hytrol cover chamber valve Ans: ✓ ✓ ✓ D.) through the
CDHS-3 to the auxiliary hytrol cover chamber valve
the primary purpose of the orifice plate on the 302AF fueling and defueling valve is to create
differential
A.) pressure to operate the pressure differential control(DCHS-2)
B.) pressure to operate the pressure differential shut-off (CDHS-3)
C.) flow to operate the CDHS-2
D.) flow to operate the CDHS-3 Ans: ✓ ✓ ✓ B.) pressure to operate the CDHS-3
during refueling which 302AF fueling and defueling valve component hold the defuel side of the
main valve inlet closed?
A.) loading pressure relief control CRL
B.) pressure differential shutoff (CDHS-3)
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WFSM - Set B (Volume 3) Questions with Detailed
Verified Answers
What are the positions of the pump control switch?
A.) HAND/OFF
B.) HAND/AUTO
C.) HAND/OFF/AUTO
D.) HAND/OFF/MANUAL Ans: ✓ ✓ ✓ C.) HAND/OFF/AUTO
The graphic display on the type 3 pump control panel is a single line
A.) diagram of the electrical wiring
B.) diagram of the pump control system
C.) mechanical diagram of the type 2 system
D.) mechanical diagram of the type 3 system Ans: ✓ ✓ ✓ D.) mechanical diagram of the type 3
system
Most emergency service calls involve
A.) electrical shorts
B.) no fuel delivery
C.) minor leaks
D.) jammed valves Ans: ✓ ✓ ✓ B.) no fuel delivery
The pump is running, but no fuel is delivered. What is your first step in diagnosing the problem
A.) check the pump
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B.) check all valves
C.) review the as-built drawing
D.) check the fuel storage tank Ans: ✓ ✓ ✓ C.) Review the as-built drawing
In the modified Panera system, how many tanks are used for defueling aircraft?
A.) 1
B.) 3
C.) 5
D.) 7 Ans: ✓ ✓ ✓ A.) 1
The u bend in the panel hydrant system pit defuel line
A.) allows the line to expand
B.) absorbs the hydronic shock
C.) keeps a portion of the Line and meter from draining
D.) provides a place for priming the pump Ans: ✓ ✓ ✓ C.) keeps a portion of the line and meter
from draining
How many hydrant outlets are served by each Panero pit?
A.) 1
B.) 2
C.) 3
D.) 4 Ans: ✓ ✓ ✓ A.) 1
When operating normally what part of the 302AF fueling/defueling valve restricts the flow of fuel in
the control tubing and will not close
A.) ejector strainer
B.) control valve flow control
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C.) pressure relief control (CRL)
D.) pressure reducing control (CRD) Ans: ✓ ✓ ✓ D.) Pressure reducing control (CRD)
Which component closes the main valve of the 302AF refueling/defueling valve when there is
excess flow at the hydrant outlet?
A.) Pressure-reducing control (CRD)
B.) Pressure-differential shutoff (CDHS-3)
C.) Loading pressure-relief control (CRL)
D.) Control valve (CV) flow control Ans: ✓ ✓ ✓ B.) pressure differential shutoff (CDHS-3)
When the CDHS-3 on the 302AF fueling and defueling valve trips pressure in the common supply
line travels through the solenoid and goes
A.) directly to the refueling section of the valve
B.) directly to the diaphragm chamber of the auxiliary Hytrol valve
C.) through the CDHS-3 to the refueling section if the valve
D.) through the CDHS-3 to the auxiliary hytrol cover chamber valve Ans: ✓ ✓ ✓ D.) through the
CDHS-3 to the auxiliary hytrol cover chamber valve
the primary purpose of the orifice plate on the 302AF fueling and defueling valve is to create
differential
A.) pressure to operate the pressure differential control(DCHS-2)
B.) pressure to operate the pressure differential shut-off (CDHS-3)
C.) flow to operate the CDHS-2
D.) flow to operate the CDHS-3 Ans: ✓ ✓ ✓ B.) pressure to operate the CDHS-3
during refueling which 302AF fueling and defueling valve component hold the defuel side of the
main valve inlet closed?
A.) loading pressure relief control CRL
B.) pressure differential shutoff (CDHS-3)
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