FIRE APPARATUS ENGINEER (FAE) FINAL EXAM
2025/2026 BANK CURRENTLY TESTING COMPLETE
EXAM QUESTIONS WITH DETAILED VERIFIED
ANSWERS EXPERT VERIFIED /ALREADY GRADED A+
1. Define "Pump Discharge Pressure" (PDP).
...ANSWER... Pump Discharge Pressure is the velocity pressure at the outlet of the pump,
measured in pounds per square inch (PSI).
2. What is the primary function of a fire apparatus pump?
...ANSWER... To receive water from a source, increase its pressure, and discharge it through
hoses and nozzles to control a fire.
3. State the formula for calculating required pump discharge pressure when using smooth bore
nozzles.
...ANSWER... PDP = Nozzle Pressure + Friction Loss + Hose Layout Loss +/- Elevation
Pressure.
4. What is the standard nozzle pressure for a handline using a smooth bore tip?
...ANSWER... 50 PSI.
5. What is the standard nozzle pressure for a master stream appliance using a smooth bore tip?
...ANSWER... 80 PSI.
6. What is the standard nozzle pressure for a fog nozzle?
...ANSWER... 100 PSI.
7. Explain what "Friction Loss" is in a fire hose.
...ANSWER... The loss of water pressure due to the turbulence created by water moving
against the interior walls of the hose.
8. According to standard fire service hydraulics, what is the friction loss coefficient for 1 ¾-inch
hose?
, ...ANSWER... Typically 15.5 (FL = C * Q² * L), though this can vary by department.
9. According to standard fire service hydraulics, what is the friction loss coefficient for 2 ½-inch
hose?
...ANSWER... Typically 2 (FL = C * Q² * L), though this can vary by department.
10. According to standard fire service hydraulics, what is the friction loss coefficient for 5-inch
hose?
...ANSWER... Typically 0.08 (FL = C * Q² * L), though this can vary by department.
11. What is the friction loss in 200 feet of 2 ½-inch hose flowing 250 GPM?
...ANSWER... FL = C * Q² * L = 2 * (250/100)² * (200/100) = 2 * (2.5)² * 2 = 2 * 6.25 * 2 =
25 PSI.
12. Calculate the pump discharge pressure for a single 2 ½-inch handline with a 250 GPM fog
nozzle, 400 feet of hose, on level ground.
...ANSWER... PDP = NP + FL + Appliance Loss. NP=100, FL= 2 * (250/100)² * (400/100) =
2 * 6.25 * 4 = 50 PSI. Appliance Loss=0 (for a simple handline). PDP = 100 + 50 + 0 = 150 PSI.
13. How much pressure loss or gain is created by a 10-foot change in elevation?
...ANSWER... 5 PSI. A 10-foot rise loses 5 PSI, a 10-foot drop gains 5 PSI.
14. A fire stream is being supplied to a nozzle 30 feet above the pump. What is the elevation
pressure that must be added to the pump discharge pressure?
...ANSWER... 15 PSI. (30 ft / 10 ft per 5 PSI) * 5 PSI = 15 PSI.
15. A fire stream is being supplied to a nozzle 20 feet below the pump in a basement. What is the
elevation pressure that must be subtracted from the pump discharge pressure?
...ANSWER... 10 PSI. (20 ft / 10 ft per 5 PSI) * 5 PSI = 10 PSI.
16. What is the purpose of a pressure relief valve on a fire pump?
...ANSWER... To automatically control the pump discharge pressure by bypassing water to
prevent excessive pressure that could damage hoses or injure firefighters.
,17. Describe the process of "priming" a centrifugal pump.
...ANSWER... Removing air from the pump and suction hose to create a partial vacuum,
allowing atmospheric pressure to push water into the pump.
18. What is "cavitation" in a fire pump?
...ANSWER... A condition where the pump is attempting to discharge more water than it is
receiving, causing vapor pockets to form and collapse inside the pump, leading to noise,
vibration, and potential damage.
19. What are the audible and visual signs of pump cavitation?
...ANSWER... A loud rattling or grinding noise, pump vibration, and erratic pressure gauge
readings.
20. What immediate action should an engineer take if cavitation is suspected?
...ANSWER... Throttle down (reduce the RPM) on the pump until the noise and vibration
stop.
21. What is the maximum theoretical lift for a centrifugal pump at sea level?
...ANSWER... Approximately 33.9 feet.
22. In practical fireground operations, what is the maximum reliable lift for a centrifugal pump?
...ANSWER... About 15-20 feet.
23. Define "Net Pump Pressure."
...ANSWER... The actual pressure developed by the pump, calculated as Pump Discharge
Pressure minus Intake Pressure.
24. What is the difference between a "static" water source and a "pressurized" water source?
...ANSWER... A static source (pond, pool) has no inherent pressure, while a pressurized
source (hydrant, pressurized tank) has incoming pressure.
, 25. What does "GPM" stand for?
...ANSWER... Gallons Per Minute.
26. What is the purpose of a "transfer valve" on a two-stage centrifugal pump?
...ANSWER... To switch the pump between volume/pressure series mode (for high volume,
lower pressure) and pressure/volume parallel mode (for higher pressure, lower volume).
27. In which pump mode (Series/Parallel) should a two-stage pump be operated when using a
single handline?
...ANSWER... Pressure/Volume Parallel Mode.
28. In which pump mode (Series/Parallel) should a two-stage pump be operated when supplying
a large-diameter hose relay or multiple handlines?
...ANSWER... Volume/Pressure Series Mode.
29. What is the "Governor" on a fire apparatus pump?
...ANSWER... An automatic pressure control system that regulates engine RPM to maintain a
constant pump discharge pressure.
30. What is the critical step before engaging a pump governor?
...ANSWER... Manually set the pump to the desired discharge pressure and ensure it is stable.
31. What is "Water Hammer"?
...ANSWER... A sudden, destructive rise in pressure caused by the rapid closing of a valve or
nozzle, which stops the momentum of the water column in the hose.
32. Why must valves and nozzles be opened and closed slowly?
...ANSWER... To prevent water hammer, which can damage the pump, plumbing, hoses, and
appliances.
33. What is the purpose of a "circulating relief valve"?
2025/2026 BANK CURRENTLY TESTING COMPLETE
EXAM QUESTIONS WITH DETAILED VERIFIED
ANSWERS EXPERT VERIFIED /ALREADY GRADED A+
1. Define "Pump Discharge Pressure" (PDP).
...ANSWER... Pump Discharge Pressure is the velocity pressure at the outlet of the pump,
measured in pounds per square inch (PSI).
2. What is the primary function of a fire apparatus pump?
...ANSWER... To receive water from a source, increase its pressure, and discharge it through
hoses and nozzles to control a fire.
3. State the formula for calculating required pump discharge pressure when using smooth bore
nozzles.
...ANSWER... PDP = Nozzle Pressure + Friction Loss + Hose Layout Loss +/- Elevation
Pressure.
4. What is the standard nozzle pressure for a handline using a smooth bore tip?
...ANSWER... 50 PSI.
5. What is the standard nozzle pressure for a master stream appliance using a smooth bore tip?
...ANSWER... 80 PSI.
6. What is the standard nozzle pressure for a fog nozzle?
...ANSWER... 100 PSI.
7. Explain what "Friction Loss" is in a fire hose.
...ANSWER... The loss of water pressure due to the turbulence created by water moving
against the interior walls of the hose.
8. According to standard fire service hydraulics, what is the friction loss coefficient for 1 ¾-inch
hose?
, ...ANSWER... Typically 15.5 (FL = C * Q² * L), though this can vary by department.
9. According to standard fire service hydraulics, what is the friction loss coefficient for 2 ½-inch
hose?
...ANSWER... Typically 2 (FL = C * Q² * L), though this can vary by department.
10. According to standard fire service hydraulics, what is the friction loss coefficient for 5-inch
hose?
...ANSWER... Typically 0.08 (FL = C * Q² * L), though this can vary by department.
11. What is the friction loss in 200 feet of 2 ½-inch hose flowing 250 GPM?
...ANSWER... FL = C * Q² * L = 2 * (250/100)² * (200/100) = 2 * (2.5)² * 2 = 2 * 6.25 * 2 =
25 PSI.
12. Calculate the pump discharge pressure for a single 2 ½-inch handline with a 250 GPM fog
nozzle, 400 feet of hose, on level ground.
...ANSWER... PDP = NP + FL + Appliance Loss. NP=100, FL= 2 * (250/100)² * (400/100) =
2 * 6.25 * 4 = 50 PSI. Appliance Loss=0 (for a simple handline). PDP = 100 + 50 + 0 = 150 PSI.
13. How much pressure loss or gain is created by a 10-foot change in elevation?
...ANSWER... 5 PSI. A 10-foot rise loses 5 PSI, a 10-foot drop gains 5 PSI.
14. A fire stream is being supplied to a nozzle 30 feet above the pump. What is the elevation
pressure that must be added to the pump discharge pressure?
...ANSWER... 15 PSI. (30 ft / 10 ft per 5 PSI) * 5 PSI = 15 PSI.
15. A fire stream is being supplied to a nozzle 20 feet below the pump in a basement. What is the
elevation pressure that must be subtracted from the pump discharge pressure?
...ANSWER... 10 PSI. (20 ft / 10 ft per 5 PSI) * 5 PSI = 10 PSI.
16. What is the purpose of a pressure relief valve on a fire pump?
...ANSWER... To automatically control the pump discharge pressure by bypassing water to
prevent excessive pressure that could damage hoses or injure firefighters.
,17. Describe the process of "priming" a centrifugal pump.
...ANSWER... Removing air from the pump and suction hose to create a partial vacuum,
allowing atmospheric pressure to push water into the pump.
18. What is "cavitation" in a fire pump?
...ANSWER... A condition where the pump is attempting to discharge more water than it is
receiving, causing vapor pockets to form and collapse inside the pump, leading to noise,
vibration, and potential damage.
19. What are the audible and visual signs of pump cavitation?
...ANSWER... A loud rattling or grinding noise, pump vibration, and erratic pressure gauge
readings.
20. What immediate action should an engineer take if cavitation is suspected?
...ANSWER... Throttle down (reduce the RPM) on the pump until the noise and vibration
stop.
21. What is the maximum theoretical lift for a centrifugal pump at sea level?
...ANSWER... Approximately 33.9 feet.
22. In practical fireground operations, what is the maximum reliable lift for a centrifugal pump?
...ANSWER... About 15-20 feet.
23. Define "Net Pump Pressure."
...ANSWER... The actual pressure developed by the pump, calculated as Pump Discharge
Pressure minus Intake Pressure.
24. What is the difference between a "static" water source and a "pressurized" water source?
...ANSWER... A static source (pond, pool) has no inherent pressure, while a pressurized
source (hydrant, pressurized tank) has incoming pressure.
, 25. What does "GPM" stand for?
...ANSWER... Gallons Per Minute.
26. What is the purpose of a "transfer valve" on a two-stage centrifugal pump?
...ANSWER... To switch the pump between volume/pressure series mode (for high volume,
lower pressure) and pressure/volume parallel mode (for higher pressure, lower volume).
27. In which pump mode (Series/Parallel) should a two-stage pump be operated when using a
single handline?
...ANSWER... Pressure/Volume Parallel Mode.
28. In which pump mode (Series/Parallel) should a two-stage pump be operated when supplying
a large-diameter hose relay or multiple handlines?
...ANSWER... Volume/Pressure Series Mode.
29. What is the "Governor" on a fire apparatus pump?
...ANSWER... An automatic pressure control system that regulates engine RPM to maintain a
constant pump discharge pressure.
30. What is the critical step before engaging a pump governor?
...ANSWER... Manually set the pump to the desired discharge pressure and ensure it is stable.
31. What is "Water Hammer"?
...ANSWER... A sudden, destructive rise in pressure caused by the rapid closing of a valve or
nozzle, which stops the momentum of the water column in the hose.
32. Why must valves and nozzles be opened and closed slowly?
...ANSWER... To prevent water hammer, which can damage the pump, plumbing, hoses, and
appliances.
33. What is the purpose of a "circulating relief valve"?
