FIRE APPARATUS ENGINEER (FAE)
FINAL EXAM 2025/2026 BANK
CURRENTLY TESTING COMPLETE
EXAM QUESTIONS WITH DETAILED
VERIFIED ANSWERS EXPERT
VERIFIED /ALREADY GRADED A+
What is One Eighth (1/8") Rule for figuring out Nozzle
GPM in a 50 PSI Hand line Smooth Bore? -
....ANSWER...50 PSI nozzle: 1/8" change in nozzle
diameter at 50 psi nozzle pressure changes the flow by
approximately 50 GPM
80 PSI Nozzle: 1/8" change in nozzle diameter at 80 psi
nozzle pressure changes the flow by approximately 100
GPM up to and including 2" tips
What is One Eighth (1/8") Rule for figuring out Nozzle
GPM in a 80 PSI master stream Smooth bore? -
....ANSWER...80 PSI Nozzle: 1/8" change in nozzle
,diameter at 80 psi nozzle pressure changes the flow by
approximately 100 GPM up to and including 2" tips
What is Friction Loss (FL) formula for 1-1/2" hose? -
....ANSWER...FL= the FL in 2-1/2" hose at 4 times the
stated GPM
Field Hydraulics: 100 GPM Fog nozzle on a 1-1/2 line= 30
lbs(psi) per 100'(feet) friction loss
What is Friction Loss(FL) formula for 1-3/4" hose? -
....ANSWER...FL=(10Q²)+10
Field Hydraulics: 150 GPM Fog Nozzle on a 1-3/4 line = 32
lbs.(psi) per 100'(feet) friction loss
What is Friction Loss (FL) formula for 2" hose? -
....ANSWER...FL= (2Q²+Q)x3
What is Friction Loss (FL) formula for 2-1/2" hose? -
....ANSWER...FL= (2Q²+Q)
What is Friction Loss (FL) formula for 3" hose? -
....ANSWER...FL= (2Q²+Q)x 0.4
,Instead of multiplying by 0.4 you can do double, double and
moving decimal.
Examples of Double Double method for 3" hose formula -
....ANSWER...Example: Q=2
FL= 2x2x2+2= 10
(Double Double): 10+10= 20
20+20= 40
Move decimal: 4.0= 4 psi per 100' 3"
What is Friction Loss (FL) formula for 3-1/2" hose? -
....ANSWER...FL= (2Q²+Q)x0.17
What is Friction Loss (FL) formula for 4" hose? -
....ANSWER...FL= (2Q²+Q)x0.1
For multiplying by 0.1 just move decimal to the left one
number example 18.0=1.80
What is Friction Loss (FL) formula for 4-1/2" hose? -
....ANSWER...FL=(2Q²+Q)x.05
, What is Friction Loss (FL) formula for 5" hose? -
....ANSWER...FL=(2Q²+Q)x 0.03
What is Q value for the Q formula - ....ANSWER...Q=
GPM divided by 100
Example: 200 GPM=2.00
Q=2
How do you Calculate Elevation? - ....ANSWER...Add 5
psi for each floor of elevation (exclude 1st floor)
Subtract 5 psi for each floor below grade
What is the pressure for Standpipe system and siamese? -
....ANSWER...add 25 psi
What is the pressure for Gated Wye's and Siamese
appliances? - ....ANSWER...Add 10 psi
What is the pressure for all Master Stream devices? -
....ANSWER...Add 20 psi
FINAL EXAM 2025/2026 BANK
CURRENTLY TESTING COMPLETE
EXAM QUESTIONS WITH DETAILED
VERIFIED ANSWERS EXPERT
VERIFIED /ALREADY GRADED A+
What is One Eighth (1/8") Rule for figuring out Nozzle
GPM in a 50 PSI Hand line Smooth Bore? -
....ANSWER...50 PSI nozzle: 1/8" change in nozzle
diameter at 50 psi nozzle pressure changes the flow by
approximately 50 GPM
80 PSI Nozzle: 1/8" change in nozzle diameter at 80 psi
nozzle pressure changes the flow by approximately 100
GPM up to and including 2" tips
What is One Eighth (1/8") Rule for figuring out Nozzle
GPM in a 80 PSI master stream Smooth bore? -
....ANSWER...80 PSI Nozzle: 1/8" change in nozzle
,diameter at 80 psi nozzle pressure changes the flow by
approximately 100 GPM up to and including 2" tips
What is Friction Loss (FL) formula for 1-1/2" hose? -
....ANSWER...FL= the FL in 2-1/2" hose at 4 times the
stated GPM
Field Hydraulics: 100 GPM Fog nozzle on a 1-1/2 line= 30
lbs(psi) per 100'(feet) friction loss
What is Friction Loss(FL) formula for 1-3/4" hose? -
....ANSWER...FL=(10Q²)+10
Field Hydraulics: 150 GPM Fog Nozzle on a 1-3/4 line = 32
lbs.(psi) per 100'(feet) friction loss
What is Friction Loss (FL) formula for 2" hose? -
....ANSWER...FL= (2Q²+Q)x3
What is Friction Loss (FL) formula for 2-1/2" hose? -
....ANSWER...FL= (2Q²+Q)
What is Friction Loss (FL) formula for 3" hose? -
....ANSWER...FL= (2Q²+Q)x 0.4
,Instead of multiplying by 0.4 you can do double, double and
moving decimal.
Examples of Double Double method for 3" hose formula -
....ANSWER...Example: Q=2
FL= 2x2x2+2= 10
(Double Double): 10+10= 20
20+20= 40
Move decimal: 4.0= 4 psi per 100' 3"
What is Friction Loss (FL) formula for 3-1/2" hose? -
....ANSWER...FL= (2Q²+Q)x0.17
What is Friction Loss (FL) formula for 4" hose? -
....ANSWER...FL= (2Q²+Q)x0.1
For multiplying by 0.1 just move decimal to the left one
number example 18.0=1.80
What is Friction Loss (FL) formula for 4-1/2" hose? -
....ANSWER...FL=(2Q²+Q)x.05
, What is Friction Loss (FL) formula for 5" hose? -
....ANSWER...FL=(2Q²+Q)x 0.03
What is Q value for the Q formula - ....ANSWER...Q=
GPM divided by 100
Example: 200 GPM=2.00
Q=2
How do you Calculate Elevation? - ....ANSWER...Add 5
psi for each floor of elevation (exclude 1st floor)
Subtract 5 psi for each floor below grade
What is the pressure for Standpipe system and siamese? -
....ANSWER...add 25 psi
What is the pressure for Gated Wye's and Siamese
appliances? - ....ANSWER...Add 10 psi
What is the pressure for all Master Stream devices? -
....ANSWER...Add 20 psi
