DRIVER OPERATOR MOBILE WATER SUPPLY
Driver Operator Mobile Water Supply Questions With
Detailed Answers.
Identify FIVE requirements for a MWS apparatus that can be found in NFPA 1901 - ✔✔✔- 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:
- ✔✔✔- saddle tanks
Daily inspection - ✔✔✔- Ensure auxiliary fuel tank is full
Operate pump primer
Inspect auxiliary winterization system.
DRIVER OPERATOR MOBILE WATER SUPPLY
Page 1
, DRIVER OPERATOR MOBILE WATER SUPPLY
Weekly Inspection - ✔✔✔- Clean intake strainers
Pre-service pump certification test are conducted by: - ✔✔✔- 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. - ✔✔✔- 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? - ✔✔✔- 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: - ✔✔✔- 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. - ✔✔✔- 30 seconds
Place the steps for conducting a pumping test in the correct order. - ✔✔✔- 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.
DRIVER OPERATOR MOBILE WATER SUPPLY
Page 2
Driver Operator Mobile Water Supply Questions With
Detailed Answers.
Identify FIVE requirements for a MWS apparatus that can be found in NFPA 1901 - ✔✔✔- 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:
- ✔✔✔- saddle tanks
Daily inspection - ✔✔✔- Ensure auxiliary fuel tank is full
Operate pump primer
Inspect auxiliary winterization system.
DRIVER OPERATOR MOBILE WATER SUPPLY
Page 1
, DRIVER OPERATOR MOBILE WATER SUPPLY
Weekly Inspection - ✔✔✔- Clean intake strainers
Pre-service pump certification test are conducted by: - ✔✔✔- 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. - ✔✔✔- 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? - ✔✔✔- 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: - ✔✔✔- 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. - ✔✔✔- 30 seconds
Place the steps for conducting a pumping test in the correct order. - ✔✔✔- 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.
DRIVER OPERATOR MOBILE WATER SUPPLY
Page 2
