©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Driver Operator Mobile Water Supply.
Exam Questions And Correct Answers
Identify FIVE requirements for a MWS apparatus that can be found in NFPA 1901 - 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: -
answer✔saddle tanks
Daily inspection - answer✔Ensure auxiliary fuel tank is full
Operate pump primer
Inspect auxiliary winterization system.
Weekly Inspection - answer✔Clean intake strainers
Pre-service pump certification test are conducted by: - answer✔An independent testing agency
1|Page
, ©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
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. - 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? - 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: - 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. - answer✔30 seconds
Place the steps for conducting a pumping test in the correct order. - 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.
5. Set the net pump discharge pressure to 250 PSI.
Pressure Control Test - answer✔1. Engage the pump and set it to the pump capacity.
2. Set the pressure control device.
3. Close the discharge valves.
4. Note the pump discharge
2|Page
ALL RIGHTS RESERVED.
Driver Operator Mobile Water Supply.
Exam Questions And Correct Answers
Identify FIVE requirements for a MWS apparatus that can be found in NFPA 1901 - 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: -
answer✔saddle tanks
Daily inspection - answer✔Ensure auxiliary fuel tank is full
Operate pump primer
Inspect auxiliary winterization system.
Weekly Inspection - answer✔Clean intake strainers
Pre-service pump certification test are conducted by: - answer✔An independent testing agency
1|Page
, ©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
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. - 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? - 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: - 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. - answer✔30 seconds
Place the steps for conducting a pumping test in the correct order. - 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.
5. Set the net pump discharge pressure to 250 PSI.
Pressure Control Test - answer✔1. Engage the pump and set it to the pump capacity.
2. Set the pressure control device.
3. Close the discharge valves.
4. Note the pump discharge
2|Page
