FIRE APPARATUS ENGINEER EXAM 75
COMPREHENSIVE EXAM 2026 FULL
QUESTIONS AND CORRECT ANSWERS
ALREADY PASSED
◉ 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..
Answer: How to calculate psi loss for each additional line off hydrant
and know how many lines can be taken off hydrant?
◉ 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.
Answer: Examples of how to calculate psi loss for each additional
line off hydrant
,◉ 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).
Answer: What are all the steps in Certification Test (pre-service
tests)?
◉ 100% @ 165 psi (done in certification test for 10 minutes).
Answer: What is a Spurt or Overload test?
◉ 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).
Answer: What are all the steps in a Service Test?
◉ 100% capacity @ 150 psi net pump pressure
70% capacity @ 200 psi net pump pressure
50% capacity @ 250 psi net pump pressure.
Answer: What are Pump Tests?
,◉ 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.
Answer: What is Net Engine/Pump Pressure (NEP)?
◉ 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.
Answer: Examples of figuring out Net Engine/Pump Pressure (NEP)
◉ Pump Discharge Pressure (PDP) is:
PDP= Net pump pressure(NEP) - Suction Side Work.
Answer: What is Pump Discharge Pressure?
◉ Suction Side Work(psi)= Lift (ft)+Intake Hose FL(Friction Loss)
(psi) Divided by 2.3.
Answer: How do you figure out Suction Side Work ?
, ◉ 100 psi.
Answer: What is Fog nozzle pressure for Hand held nozzle and
Master Stream?
◉ Hand Held : 50 psi
Master Stream: 80 psi.
Answer: What is Smooth Bore nozzle pressures for Hand held nozzle
and Master Stream?
◉ "For every action there is an equal and opposite reaction".
Answer: What is Newton's Third Law of motion pertaining to Nozzle
Reaction?
◉ As water leaks a nozzle under pressure, it causes a reactionary
force in the opposite direction..
Answer: What is Nozzle Reaction?
◉ The formula used for calculation of nozzle reaction is : NR=
1.57D²P.
Answer: What is the Nozzle Reaction formula?
◉ 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.)..
COMPREHENSIVE EXAM 2026 FULL
QUESTIONS AND CORRECT ANSWERS
ALREADY PASSED
◉ 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..
Answer: How to calculate psi loss for each additional line off hydrant
and know how many lines can be taken off hydrant?
◉ 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.
Answer: Examples of how to calculate psi loss for each additional
line off hydrant
,◉ 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).
Answer: What are all the steps in Certification Test (pre-service
tests)?
◉ 100% @ 165 psi (done in certification test for 10 minutes).
Answer: What is a Spurt or Overload test?
◉ 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).
Answer: What are all the steps in a Service Test?
◉ 100% capacity @ 150 psi net pump pressure
70% capacity @ 200 psi net pump pressure
50% capacity @ 250 psi net pump pressure.
Answer: What are Pump Tests?
,◉ 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.
Answer: What is Net Engine/Pump Pressure (NEP)?
◉ 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.
Answer: Examples of figuring out Net Engine/Pump Pressure (NEP)
◉ Pump Discharge Pressure (PDP) is:
PDP= Net pump pressure(NEP) - Suction Side Work.
Answer: What is Pump Discharge Pressure?
◉ Suction Side Work(psi)= Lift (ft)+Intake Hose FL(Friction Loss)
(psi) Divided by 2.3.
Answer: How do you figure out Suction Side Work ?
, ◉ 100 psi.
Answer: What is Fog nozzle pressure for Hand held nozzle and
Master Stream?
◉ Hand Held : 50 psi
Master Stream: 80 psi.
Answer: What is Smooth Bore nozzle pressures for Hand held nozzle
and Master Stream?
◉ "For every action there is an equal and opposite reaction".
Answer: What is Newton's Third Law of motion pertaining to Nozzle
Reaction?
◉ As water leaks a nozzle under pressure, it causes a reactionary
force in the opposite direction..
Answer: What is Nozzle Reaction?
◉ The formula used for calculation of nozzle reaction is : NR=
1.57D²P.
Answer: What is the Nozzle Reaction formula?
◉ 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.)..
