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FAE (Fire Apparatus Engineer) Illinois NEWEST ACTUAL EXAM 160 QUESTIONS AND DETAILED ANSWERS
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FAE (Fire Apparatus Engineer) Illinois NEWEST ACTUAL EXAM 160 QUESTIONS AND DETAILED ANSWERS
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FAE (Fire Apparatus Engineer) IllinoisNEWEST ACTUAL EXAM 160 QUESTIONS AND
DETAILED ANSWERS
62.5 lbs - ANSWERWhat does one cubic foot of water weigh?
1.728 cubic inches - ANSWERWhat does One cubic foot of water contain in inches?
7.5 gallons - ANSWERWhat does One cubic foot of water contain in gallons?
8.35 lbs - ANSWERWhat does One gallon of water weigh?
231 cubic inches - ANSWERWhat does One gallon of water contain in inches?
.434 psi - ANSWERWhat is One foot of water exert as a back pressure?
2.304 feet - ANSWERHow high will One psi elevate water?
14.7 psi - ANSWERWhat is atmospheric pressure at sea level?
34 feet - ANSWERWhat is the maximum lift for drafting? (Theoretically)
1.13 feet of lift - ANSWERHow high does One inch (1") mercury (inches in vacuum) lift?
10 psi - ANSWERWhat is the recommended minimum psi that should be maintained on
the compound gauge when taking water from a hydrant?
Stored or potential energy that is available to force water through pipes and fittings, fire
hose, and adapters. - ANSWERWhat is Static pressure?
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. - ANSWERResidual
Pressure
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. - ANSWERHow 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 -
ANSWERExamples 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) - ANSWERWhat are all the
steps in Certification Test (pre-service tests)?
100% @ 165 psi (done in certification test for 10 minutes) - ANSWERWhat 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) - ANSWERWhat 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 - ANSWERWhat 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 - ANSWERWhat 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 - ANSWERExamples of figuring out Net
Engine/Pump Pressure (NEP)
Pump Discharge Pressure (PDP) is:
PDP= Net pump pressure(NEP) - Suction Side Work - ANSWERWhat is Pump
Discharge Pressure?
, Suction Side Work(psi)= Lift (ft)+Intake Hose FL(Friction Loss) (psi) Divided by 2.3 -
ANSWERHow do you figure out Suction Side Work ?
100 psi - ANSWERWhat is Fog nozzle pressure for Hand held nozzle and Master
Stream?
Hand Held : 50 psi
Master Stream: 80 psi - ANSWERWhat is Smooth Bore nozzle pressures for Hand held
nozzle and Master Stream?
"For every action there is an equal and opposite reaction" - ANSWERWhat 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. - ANSWERWhat is Nozzle Reaction?
The formula used for calculation of nozzle reaction is : NR= 1.57D²P - ANSWERWhat 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.). -
ANSWERWhat is fire ground Nozzle Reaction calculations?
1. Air Resistance
2. Gravity - ANSWERWhat are the two variables that affect the reach of fire streams?
30-34 degrees - ANSWERWhat angle does a stream get the greatest horizontal reach?
60-75 degrees - ANSWERWhat angle does a stream get the maximum effective vertical
reach?
10% to 15% - ANSWERWhat percent can head and tail winds affect the reach of a
stream?
1"= 200 GPM
1-1/8"= 250 GPM
1-1/4"= 300 GPM
50 PSI FL for nozzle - ANSWERWhat is Hand Lines Solid Stream GPM for tips?
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
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