Fire Apparatus Driver/Operator -
MWS Module 4 Questions with
Accurate Answers
Atmospheric Pressure correct answer Is the pressure that the atmosphere exerts
on earth. At sea level, atmospheric pressure is 14.7 psi.
Keep in mind that atmospheric pressure decreases as altitude increases.
For example, at higher altitudes, pumps must work harder in the thinner
atmosphere to lift effectively when drafting.
Challenge Review #1
Identify TWO correct Statements about hydrants correct answer A. All hydrants in
a distribution grid supply the same flow of water
B. Gride systems with large supply mains and looping secondary mains generally
have less friction losses and deterioration (Correct Answer)
C. Dead-end hydrants are a good source of water and are often found on dead-
end streets
D. If you're already working with a pressurized source, you will not need to use
the apparatus fire pump when connecting to a hydrant.
,E. If hydrants are color-coded, select the light blue hydrant when responding to a
large incident and be sure to test the flow before connecting the hydrant to the
fire pump (Correct Answer)
Challenge Review #10
What is the minimum required intake pressure of the apparatus being
resupplied? correct answer A. 20 psi (Correct Answer)
B. 50 psi
C. 75 psi
D. 100 psi
Challenge Review #11
Given the flow in GPM, hose length, and hose diameter, you can use a pump chart
to determine the: correct answer A. Total pressure loss (Correct Answer)
B. Hose friction loss
C. Intake pressure
D. Nozzle
, Challenge Review #12
The condensed "Q" formula for a 4-inch hoseline is: correct answer A. FL = Q(2)
B. FL = Q(2) / 5 (Correct Answer)
C. FL = Q(2) / 15
D. FL = Q / 5
Challenge Review #13
Using the hand method to calculate fireground pressure losses, the estimated
friction loss for 100 feet of 2 1/2-inch hose at 300 GPM is approximately: correct
answer A. 18 psi (Correct Answer)
B. 36 psi
C. 54 psi
D. 72 psi
Challenge Review #14
MWS Module 4 Questions with
Accurate Answers
Atmospheric Pressure correct answer Is the pressure that the atmosphere exerts
on earth. At sea level, atmospheric pressure is 14.7 psi.
Keep in mind that atmospheric pressure decreases as altitude increases.
For example, at higher altitudes, pumps must work harder in the thinner
atmosphere to lift effectively when drafting.
Challenge Review #1
Identify TWO correct Statements about hydrants correct answer A. All hydrants in
a distribution grid supply the same flow of water
B. Gride systems with large supply mains and looping secondary mains generally
have less friction losses and deterioration (Correct Answer)
C. Dead-end hydrants are a good source of water and are often found on dead-
end streets
D. If you're already working with a pressurized source, you will not need to use
the apparatus fire pump when connecting to a hydrant.
,E. If hydrants are color-coded, select the light blue hydrant when responding to a
large incident and be sure to test the flow before connecting the hydrant to the
fire pump (Correct Answer)
Challenge Review #10
What is the minimum required intake pressure of the apparatus being
resupplied? correct answer A. 20 psi (Correct Answer)
B. 50 psi
C. 75 psi
D. 100 psi
Challenge Review #11
Given the flow in GPM, hose length, and hose diameter, you can use a pump chart
to determine the: correct answer A. Total pressure loss (Correct Answer)
B. Hose friction loss
C. Intake pressure
D. Nozzle
, Challenge Review #12
The condensed "Q" formula for a 4-inch hoseline is: correct answer A. FL = Q(2)
B. FL = Q(2) / 5 (Correct Answer)
C. FL = Q(2) / 15
D. FL = Q / 5
Challenge Review #13
Using the hand method to calculate fireground pressure losses, the estimated
friction loss for 100 feet of 2 1/2-inch hose at 300 GPM is approximately: correct
answer A. 18 psi (Correct Answer)
B. 36 psi
C. 54 psi
D. 72 psi
Challenge Review #14
