FAE (FIRE APPARATUS ENGINEER)
2025 ACTUAL QUESTIONS WITH
ANSWERS VERIFIED BY EXPERTS
What does one cubic foot of water weigh? - CORRECT ANSWER>>>>62.5 lbs
What does One cubic foot of water contain in inches? - CORRECT ANSWER>>>>1.728 cubic
inches
What does One cubic foot of water contain in gallons? - CORRECT ANSWER>>>>7.5 gallons
What does One gallon of water weigh? - CORRECT ANSWER>>>>8.35 lbs
What does One gallon of water contain in inches? - CORRECT ANSWER>>>>231 cubic inches
What is One foot of water exert as a back pressure? - CORRECT ANSWER>>>>.434 psi
How high will One psi elevate water? - CORRECT ANSWER>>>>2.304 feet
What is atmospheric pressure at sea level? - CORRECT ANSWER>>>>14.7 psi
What is the maximum lift for drafting? (Theoretically) - CORRECT ANSWER>>>>34 feet
How high does One inch (1") mercury (inches in vacuum) lift? - CORRECT
ANSWER>>>>1.13 feet of lift
What is the recommended minimum psi that should be maintained on the compound gauge when
taking water from a hydrant? - CORRECT ANSWER>>>>10 psi
What is Static pressure? - CORRECT ANSWER>>>>Stored or potential energy that is available
to force water through pipes and fittings, fire hose, and adapters.
Residual Pressure - CORRECT ANSWER>>>>That part of the total pressure that is not used to
overcome friction or gravity while forcing water through fire hose, pipe, fittings, and adapters.
How to calculate psi loss for each additional line off hydrant and know how many lines can be
taken off hydrant? - CORRECT ANSWER>>>>Take Static pressure and subtracting residual
pressure which gets you your drop. Take your drop and multiply it by (2)² for second line, (3)²
for third line, (4)² for forth line, (5)² for fifth line. so long as after you multiply drop and the
multiplayer for the number line and still have 10 psi left based off static pressure you can have
that many lines if you have less than 10 psi you can not operate that number of lines.
Examples of how to calculate psi loss for each additional line off hydrant - CORRECT
ANSWER>>>>Example: Static pressure: 65 psi Residual pressure : 60 psi
,Drop: 5 psi
2nd line: 2²=4: 4x5= 20
3rd line: 3²=9: 9x5= 45
4th line: 4²=16: 16x5= 80 This line can't be done because it is over 65 psi
What are all the steps in Certification Test (pre-service tests)? - CORRECT ANSWER>>>>1. 2
Hour: 100% @ 150 psi
2. 1/2 hour: 70% @ 200 psi
3. 1/2 hour: 50% @ 250 psi
4. 10 minutes: 100% @ 165 psi (overload or spurt test)
What is a Spurt or Overload test? - CORRECT ANSWER>>>>100% @ 165 psi (done in
certification test for 10 minutes)
What are all the steps in a Service Test? - CORRECT ANSWER>>>>1. 20 minutes: 100% @
150 psi
2. 10 minutes: 70 % @ 200 psi
3. 10 minutes: 50% @ 250 psi
Optional: 100% @ 165 psi (overload or spurt test)
What are Pump Tests? - CORRECT ANSWER>>>>100% capacity @ 150 psi net pump
pressure
70% capacity @ 200 psi net pump pressure
50% capacity @ 250 psi net pump pressure
What is Net Engine/Pump Pressure (NEP)? - CORRECT ANSWER>>>>Net Pump Pressure
(NEP) is the measurement of the total work performed by the pump:
a. To lift water into the pump (drafting)
b. To discharge water from the pump
NEP= Suction Side Work(drafting) + Discharge Side Work
Examples of figuring out Net Engine/Pump Pressure (NEP) - CORRECT
ANSWER>>>>Examples:
Discharge gauge reads 165 psi but you are getting supplied by hydrant @ 65 psi on your intake
gauge. So the net pressure would only be 100 psi.
Now your are drafting and Intake gauge reads 20" mercury (-20) and Discharge reads 120 psi. So
your net pump pressure is 140
What is Pump Discharge Pressure? - CORRECT ANSWER>>>>Pump Discharge Pressure
(PDP) is:
PDP= Net pump pressure(NEP) - Suction Side Work
How do you figure out Suction Side Work ? - CORRECT ANSWER>>>>Suction Side
Work(psi)= Lift (ft)+Intake Hose FL(Friction Loss) (psi) Divided by 2.3
, What is Fog nozzle pressure for Hand held nozzle and Master Stream? - CORRECT
ANSWER>>>>100 psi
What is Smooth Bore nozzle pressures for Hand held nozzle and Master Stream? - CORRECT
ANSWER>>>>Hand Held : 50 psi
Master Stream: 80 psi
What is Newton's Third Law of motion pertaining to Nozzle Reaction? - CORRECT
ANSWER>>>>"For every action there is an equal and opposite reaction"
What is Nozzle Reaction? - CORRECT ANSWER>>>>As water leaks a nozzle under pressure,
it causes a reactionary force in the opposite direction.
What is the Nozzle Reaction formula? - CORRECT ANSWER>>>>The formula used for
calculation of nozzle reaction is : NR= 1.57D²P
What is fire ground Nozzle Reaction calculations? - CORRECT ANSWER>>>>For fog nozzles
and master stream smooth bore tips, fire ground nozzle reaction calculations can be computed at
approximately 1/2 the flow (measured in lbs.).
What are the two variables that affect the reach of fire streams? - CORRECT ANSWER>>>>1.
Air Resistance
2. Gravity
What angle does a stream get the greatest horizontal reach? - CORRECT ANSWER>>>>30-34
degrees
What angle does a stream get the maximum effective vertical reach? - CORRECT
ANSWER>>>>60-75 degrees
What percent can head and tail winds affect the reach of a stream? - CORRECT
ANSWER>>>>10% to 15%
What is Hand Lines Solid Stream GPM for tips? - CORRECT ANSWER>>>>1"= 200 GPM
1-1/8"= 250 GPM
1-1/4"= 300 GPM
50 PSI FL for nozzle
What is Master Stream Solid Stream GPM for tips? - CORRECT ANSWER>>>>1-1/4"= 400
GPM
1-3/8"= 500 GPM
1-1/2"= 600 GPM
1-5/8"= 700 GPM
1-3/4"= 800 GPM
1-7/8"= 900 GPM
2"= 1000 GPM
2025 ACTUAL QUESTIONS WITH
ANSWERS VERIFIED BY EXPERTS
What does one cubic foot of water weigh? - CORRECT ANSWER>>>>62.5 lbs
What does One cubic foot of water contain in inches? - CORRECT ANSWER>>>>1.728 cubic
inches
What does One cubic foot of water contain in gallons? - CORRECT ANSWER>>>>7.5 gallons
What does One gallon of water weigh? - CORRECT ANSWER>>>>8.35 lbs
What does One gallon of water contain in inches? - CORRECT ANSWER>>>>231 cubic inches
What is One foot of water exert as a back pressure? - CORRECT ANSWER>>>>.434 psi
How high will One psi elevate water? - CORRECT ANSWER>>>>2.304 feet
What is atmospheric pressure at sea level? - CORRECT ANSWER>>>>14.7 psi
What is the maximum lift for drafting? (Theoretically) - CORRECT ANSWER>>>>34 feet
How high does One inch (1") mercury (inches in vacuum) lift? - CORRECT
ANSWER>>>>1.13 feet of lift
What is the recommended minimum psi that should be maintained on the compound gauge when
taking water from a hydrant? - CORRECT ANSWER>>>>10 psi
What is Static pressure? - CORRECT ANSWER>>>>Stored or potential energy that is available
to force water through pipes and fittings, fire hose, and adapters.
Residual Pressure - CORRECT ANSWER>>>>That part of the total pressure that is not used to
overcome friction or gravity while forcing water through fire hose, pipe, fittings, and adapters.
How to calculate psi loss for each additional line off hydrant and know how many lines can be
taken off hydrant? - CORRECT ANSWER>>>>Take Static pressure and subtracting residual
pressure which gets you your drop. Take your drop and multiply it by (2)² for second line, (3)²
for third line, (4)² for forth line, (5)² for fifth line. so long as after you multiply drop and the
multiplayer for the number line and still have 10 psi left based off static pressure you can have
that many lines if you have less than 10 psi you can not operate that number of lines.
Examples of how to calculate psi loss for each additional line off hydrant - CORRECT
ANSWER>>>>Example: Static pressure: 65 psi Residual pressure : 60 psi
,Drop: 5 psi
2nd line: 2²=4: 4x5= 20
3rd line: 3²=9: 9x5= 45
4th line: 4²=16: 16x5= 80 This line can't be done because it is over 65 psi
What are all the steps in Certification Test (pre-service tests)? - CORRECT ANSWER>>>>1. 2
Hour: 100% @ 150 psi
2. 1/2 hour: 70% @ 200 psi
3. 1/2 hour: 50% @ 250 psi
4. 10 minutes: 100% @ 165 psi (overload or spurt test)
What is a Spurt or Overload test? - CORRECT ANSWER>>>>100% @ 165 psi (done in
certification test for 10 minutes)
What are all the steps in a Service Test? - CORRECT ANSWER>>>>1. 20 minutes: 100% @
150 psi
2. 10 minutes: 70 % @ 200 psi
3. 10 minutes: 50% @ 250 psi
Optional: 100% @ 165 psi (overload or spurt test)
What are Pump Tests? - CORRECT ANSWER>>>>100% capacity @ 150 psi net pump
pressure
70% capacity @ 200 psi net pump pressure
50% capacity @ 250 psi net pump pressure
What is Net Engine/Pump Pressure (NEP)? - CORRECT ANSWER>>>>Net Pump Pressure
(NEP) is the measurement of the total work performed by the pump:
a. To lift water into the pump (drafting)
b. To discharge water from the pump
NEP= Suction Side Work(drafting) + Discharge Side Work
Examples of figuring out Net Engine/Pump Pressure (NEP) - CORRECT
ANSWER>>>>Examples:
Discharge gauge reads 165 psi but you are getting supplied by hydrant @ 65 psi on your intake
gauge. So the net pressure would only be 100 psi.
Now your are drafting and Intake gauge reads 20" mercury (-20) and Discharge reads 120 psi. So
your net pump pressure is 140
What is Pump Discharge Pressure? - CORRECT ANSWER>>>>Pump Discharge Pressure
(PDP) is:
PDP= Net pump pressure(NEP) - Suction Side Work
How do you figure out Suction Side Work ? - CORRECT ANSWER>>>>Suction Side
Work(psi)= Lift (ft)+Intake Hose FL(Friction Loss) (psi) Divided by 2.3
, What is Fog nozzle pressure for Hand held nozzle and Master Stream? - CORRECT
ANSWER>>>>100 psi
What is Smooth Bore nozzle pressures for Hand held nozzle and Master Stream? - CORRECT
ANSWER>>>>Hand Held : 50 psi
Master Stream: 80 psi
What is Newton's Third Law of motion pertaining to Nozzle Reaction? - CORRECT
ANSWER>>>>"For every action there is an equal and opposite reaction"
What is Nozzle Reaction? - CORRECT ANSWER>>>>As water leaks a nozzle under pressure,
it causes a reactionary force in the opposite direction.
What is the Nozzle Reaction formula? - CORRECT ANSWER>>>>The formula used for
calculation of nozzle reaction is : NR= 1.57D²P
What is fire ground Nozzle Reaction calculations? - CORRECT ANSWER>>>>For fog nozzles
and master stream smooth bore tips, fire ground nozzle reaction calculations can be computed at
approximately 1/2 the flow (measured in lbs.).
What are the two variables that affect the reach of fire streams? - CORRECT ANSWER>>>>1.
Air Resistance
2. Gravity
What angle does a stream get the greatest horizontal reach? - CORRECT ANSWER>>>>30-34
degrees
What angle does a stream get the maximum effective vertical reach? - CORRECT
ANSWER>>>>60-75 degrees
What percent can head and tail winds affect the reach of a stream? - CORRECT
ANSWER>>>>10% to 15%
What is Hand Lines Solid Stream GPM for tips? - CORRECT ANSWER>>>>1"= 200 GPM
1-1/8"= 250 GPM
1-1/4"= 300 GPM
50 PSI FL for nozzle
What is Master Stream Solid Stream GPM for tips? - CORRECT ANSWER>>>>1-1/4"= 400
GPM
1-3/8"= 500 GPM
1-1/2"= 600 GPM
1-5/8"= 700 GPM
1-3/4"= 800 GPM
1-7/8"= 900 GPM
2"= 1000 GPM
