FAE (Fire Apparatus Engineer) Illinois
EXAM 2025 QUESTIONS AND ANSWERS
What does one cubic foot of water weigh? - ANS 62.5 lbs
What does One cubic foot of water contain in inches? - ANS 1.728 cubic inches
What does One cubic foot of water contain in gallons? - ANS 7.5 gallons
What does One gallon of water weigh? - ANS 8.35 lbs
What does One gallon of water contain in inches? - ANS 231 cubic inches
What is One foot of water exert as a back pressure? - ANS .434 psi
How high will One psi elevate water? - ANS 2.304 feet
What is atmospheric pressure at sea level? - ANS 14.7 psi
What is the maximum lift for drafting? (Theoretically) - ANS 34 feet
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, How high does One inch (1") mercury (inches in vacuum) lift? - ANS 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? - ANS 10 psi
What is Static pressure? - ANS Stored or potential energy that is available to force water
through pipes and fittings, fire hose, and adapters.
Residual Pressure - ANS 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? - ANS 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 - ANS 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)? - ANS 1. 2 Hour: 100% @ 150
psi
2. 1/2 hour: 70% @ 200 psi
3. 1/2 hour: 50% @ 250 psi
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4. 10 minutes: 100% @ 165 psi (overload or spurt test)
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, What is a Spurt or Overload test? - ANS 100% @ 165 psi (done in certification test for 10
minutes)
What are all the steps in a Service Test? - ANS 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? - ANS 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)? - ANS 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) - ANS 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? - ANS Pump Discharge Pressure (PDP) is:
PDP= Net pump pressure(NEP) - Suction Side Work
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EXAM 2025 QUESTIONS AND ANSWERS
What does one cubic foot of water weigh? - ANS 62.5 lbs
What does One cubic foot of water contain in inches? - ANS 1.728 cubic inches
What does One cubic foot of water contain in gallons? - ANS 7.5 gallons
What does One gallon of water weigh? - ANS 8.35 lbs
What does One gallon of water contain in inches? - ANS 231 cubic inches
What is One foot of water exert as a back pressure? - ANS .434 psi
How high will One psi elevate water? - ANS 2.304 feet
What is atmospheric pressure at sea level? - ANS 14.7 psi
What is the maximum lift for drafting? (Theoretically) - ANS 34 feet
1
Page
@COPYRIGHT BRAINBARTER 2025/2026
, How high does One inch (1") mercury (inches in vacuum) lift? - ANS 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? - ANS 10 psi
What is Static pressure? - ANS Stored or potential energy that is available to force water
through pipes and fittings, fire hose, and adapters.
Residual Pressure - ANS 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? - ANS 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 - ANS 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)? - ANS 1. 2 Hour: 100% @ 150
psi
2. 1/2 hour: 70% @ 200 psi
3. 1/2 hour: 50% @ 250 psi
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4. 10 minutes: 100% @ 165 psi (overload or spurt test)
@COPYRIGHT BRAINBARTER 2025/2026
, What is a Spurt or Overload test? - ANS 100% @ 165 psi (done in certification test for 10
minutes)
What are all the steps in a Service Test? - ANS 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? - ANS 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)? - ANS 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) - ANS 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? - ANS Pump Discharge Pressure (PDP) is:
PDP= Net pump pressure(NEP) - Suction Side Work
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@COPYRIGHT BRAINBARTER 2025/2026
