Driver Operator Mobile Water Supply Questions with
Solutions
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-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-30 seconds
Place the steps for conducting a pumping test in the correct order. Correct-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.
, Driver Operator Mobile Water Supply Questions with
Solutions
5. Set the net pump discharge pressure to 250 PSI.
Pressure Control Test Correct-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
The three parts of the pressure control test require you to close the flowing valves one at a
time: Correct-In no less than 3 seconds and no more than 10 seconds
The gauge and flow meter readings with actual pitot tube readings. The two readings should
differ by no more than: Correct-10%
, Driver Operator Mobile Water Supply Questions with
Solutions
Identify FIVE requirements for a MWS apparatus that can be found in NFPA 1901 Correct-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-saddle tanks
Solutions
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-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-30 seconds
Place the steps for conducting a pumping test in the correct order. Correct-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.
, Driver Operator Mobile Water Supply Questions with
Solutions
5. Set the net pump discharge pressure to 250 PSI.
Pressure Control Test Correct-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
The three parts of the pressure control test require you to close the flowing valves one at a
time: Correct-In no less than 3 seconds and no more than 10 seconds
The gauge and flow meter readings with actual pitot tube readings. The two readings should
differ by no more than: Correct-10%
, Driver Operator Mobile Water Supply Questions with
Solutions
Identify FIVE requirements for a MWS apparatus that can be found in NFPA 1901 Correct-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-saddle tanks
