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MWS Solution Solved 100- Passed!!
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MWS Solution Solved 100- Passed!!
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MWS Solution Solved 100%Passed!!
Identify five requirements for an MWS apparatus that can be found in NFPA 1901.
Answer: An MWS apparatus equipped with a fire pump must have a tank to
pump line at least 2 inches in diameter and be capable of supplying the pump
with 500 gallons per minute until at least 80% of the water in the tank is empty.
And MWS apparatus must be equipped with at least one external feel connection
connected into the tank that allows the tank to be filled at a minimum rate of
1000 gallons per minute.
The external fill connection should be equipped with a valve, strainer, and a 30°
elbow.
Valves that are 3 inches or larger must be of the slow closing design.
And MWS apparatus must have at least three large tank discharges capable of just
charging 90% of the tank volume at an average rate of 1000 GPM.
You were stationed in Alaska in December. You just come back from a company
inspection to find that your stall door will not operate and cannot be fixed until
the following day. To prevent damage from freezing you should. Answer:
Drain the piping pump and booster lines to prevent damage.
During MWS apparatus service testing the atmospheric air temperature should be
between Answer: 0° F and 100° F
,Identify three pieces of equipment needed to conduct service testing on a MWS
apparatus equipped with a fire pump. Answer: Tachometer, smoothbore tips.
External test gages.
When testing the priming device on MWS apparatus with a fire pump with a
capacity of less than 1500 GPM the priming device should be able to create the
necessary vacuum in 30 seconds to lift water 10 feet through. Answer: 20
feet of hard suction hose.
Identify four pre-service test for an MWS apparatus equipped with a fire pump
Answer: Road test, independent pump certification test, hydrostatic test,
purchase acceptance test.
When performing a vacuum service test, once the engine is turned off, the
column of mercury should fall no more then. Answer: 10 inches in 5 minutes.
Identify three critical items that should be included on MWS apparatus daily
inspection checklist. Answer: Apparatus unit identification number, inspected
by column, remarks column.
When maintaining MWS apparatus records, you should: Answer: Refer to
your departments standard operating procedures for specific guidance.
Identify three items that are checked for leaks during the vacuum test. Answer:
Priming device, hard suction hose, pump.
, Priming test. Answer: Evaluates how quickly a device can create the
necessary vacuum to bring water through a pump to the discharge hose
Discharge pressure gauge test Answer: Checks accuracy of discharge readings
obtained when the pump is in operation.
Pumping test Answer: Checks overall condition of the engine and pump.
Tank to pump flow rate test Answer: Checks weather the piping between the
MWS apparatus water tank and fire pump meet NFPA 1901 standard.
Vacuum test Answer: Check for leaks and different devices.
Engine speed check test Answer: Checks the rate of the engine speed.
Pressure control test Answer: Measures ability of pressure control devices to
maintain certain discharge pressures.
NFPA 1911 requires an MWS apparatus equipped with a fire pump to be serviced
tested: Answer: At least once a year or when it has undergone extensive
pump repair.
Periodic documentation should capture things such as: Answer: Safety
inspections.
And MWS apparatus should be started with all electrical switches in the off
position in order to: Answer: Start the engine without a load.
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