DRIVER OPERATOR MOBILE WATER
SUPPLY QUESTIONS AND
ANSWERS (GRADED A)
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
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
The three parts of the pressure control test require you to close the flowing valves
one at a time: - ANSWER-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: - ANSWER-10%
The tank to pump flow rate test measures whether the piping between an apparatus
water tank and fire pump meets the minimum flow standards of: - ANSWER-NFPA
1901
Rope or test stand - ANSWER-Secures test nozzles
Pitot tube - ANSWER-Measures the velocity pressure of a stream of water
Tachometer - ANSWER-Checks engine speed
Solid stream nozzles - ANSWER-Needed to match the volumes pumped for different
tests
Compound gauge - ANSWER-Checks the pump intake pressure
SUPPLY QUESTIONS AND
ANSWERS (GRADED A)
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
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
The three parts of the pressure control test require you to close the flowing valves
one at a time: - ANSWER-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: - ANSWER-10%
The tank to pump flow rate test measures whether the piping between an apparatus
water tank and fire pump meets the minimum flow standards of: - ANSWER-NFPA
1901
Rope or test stand - ANSWER-Secures test nozzles
Pitot tube - ANSWER-Measures the velocity pressure of a stream of water
Tachometer - ANSWER-Checks engine speed
Solid stream nozzles - ANSWER-Needed to match the volumes pumped for different
tests
Compound gauge - ANSWER-Checks the pump intake pressure
