Driver Operator Mobile Water Supply
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Identify FIVE requirements for a MWS apparatus that can be found in NFPA 1901 - CORRECT
ANSWER - 1. An MWS apparatus equipped with a fire pump must have a tank to pump
line at least two inches in diameter and be capable of supplying the pump with 500 GPM until at
least 80% of the tank is emptied.
2. An MWS apparatus must be equipped with at least one external fill connection connected into
the tank that allows the tank to be filled at a minimum rate of 1000 GPM.
3. The external fill connection should be equipped with a valve, strainer, and a 30 degree elbow.
4.Valves that are three inches or larger must be of the slow closing design.
5. An MWS apparatus must have at least three large tank discharges capable of discharging 90%
of the tank volume at an average of 1000 GPM.
When Checking the left front or right front side of the fire apparatus, don't forget to inspect the: -
CORRECT ANSWER - saddle tanks
Daily inspection - CORRECT ANSWER - Ensure auxiliary fuel tank is full
Operate pump primer
Inspect auxiliary winterization system.
Weekly Inspection - CORRECT ANSWER - Clean intake strainers
, Pre-service pump certification test are conducted by: - CORRECT ANSWER - An
independent testing agency
When using a static body of water as your water source during fire apparatus service testing, the
water surface must not be more than___ feet above the centerline of the pump intake and the
water must be at least _____ feet deep. - CORRECT ANSWER - 10 Feet above
4 Feet deep
If the engine speed check proves the MWS apparatus is running at a different speed than what
which it was originally rated, you need to? - CORRECT ANSWER - Stop the testing until
the problem is corrected.
A year has passed and its time conduct the annual vacuum test on your departments MWS
apparatus. You're following the procedures for conducting the vacuum test and you've already
checked for and removed foreign matter from the hard suction hose. The next step to perform
while conducting the vacuum test is to: - CORRECT ANSWER - Connect 20 Feet of the
hard suction hose to the pump intake connection.
When conducting a priming device test and using a pump of less than 1500 GPM, the priming
device should be able to create the necessary vacuum in ____ seconds to lift water 10 feet
through 20 feet of hard suction hose. - CORRECT ANSWER - 30 seconds
Place the steps for conducting a pumping test in the correct order. - CORRECT
ANSWER - 1. Gradually speed up the pump until the net pump discharge pressure is 150
PSI
2. Use a pitot tube or a flow meter to check the flow of water at the nozzle.
3.Record six different readings at 5-minute intervals for a total of 20 minutes.
4. Set the net pump discharge pressure to 200 PSI.
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Identify FIVE requirements for a MWS apparatus that can be found in NFPA 1901 - CORRECT
ANSWER - 1. An MWS apparatus equipped with a fire pump must have a tank to pump
line at least two inches in diameter and be capable of supplying the pump with 500 GPM until at
least 80% of the tank is emptied.
2. An MWS apparatus must be equipped with at least one external fill connection connected into
the tank that allows the tank to be filled at a minimum rate of 1000 GPM.
3. The external fill connection should be equipped with a valve, strainer, and a 30 degree elbow.
4.Valves that are three inches or larger must be of the slow closing design.
5. An MWS apparatus must have at least three large tank discharges capable of discharging 90%
of the tank volume at an average of 1000 GPM.
When Checking the left front or right front side of the fire apparatus, don't forget to inspect the: -
CORRECT ANSWER - saddle tanks
Daily inspection - CORRECT ANSWER - Ensure auxiliary fuel tank is full
Operate pump primer
Inspect auxiliary winterization system.
Weekly Inspection - CORRECT ANSWER - Clean intake strainers
, Pre-service pump certification test are conducted by: - CORRECT ANSWER - An
independent testing agency
When using a static body of water as your water source during fire apparatus service testing, the
water surface must not be more than___ feet above the centerline of the pump intake and the
water must be at least _____ feet deep. - CORRECT ANSWER - 10 Feet above
4 Feet deep
If the engine speed check proves the MWS apparatus is running at a different speed than what
which it was originally rated, you need to? - CORRECT ANSWER - Stop the testing until
the problem is corrected.
A year has passed and its time conduct the annual vacuum test on your departments MWS
apparatus. You're following the procedures for conducting the vacuum test and you've already
checked for and removed foreign matter from the hard suction hose. The next step to perform
while conducting the vacuum test is to: - CORRECT ANSWER - Connect 20 Feet of the
hard suction hose to the pump intake connection.
When conducting a priming device test and using a pump of less than 1500 GPM, the priming
device should be able to create the necessary vacuum in ____ seconds to lift water 10 feet
through 20 feet of hard suction hose. - CORRECT ANSWER - 30 seconds
Place the steps for conducting a pumping test in the correct order. - CORRECT
ANSWER - 1. Gradually speed up the pump until the net pump discharge pressure is 150
PSI
2. Use a pitot tube or a flow meter to check the flow of water at the nozzle.
3.Record six different readings at 5-minute intervals for a total of 20 minutes.
4. Set the net pump discharge pressure to 200 PSI.
