DRIVER OPERATOR MOBILE WATER SUPPLY QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTION
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.
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.
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
ANSWERS WITH COMPLETE SOLUTION
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.
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.
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
