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MWS Questions & Detailed Answers 2024
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MWS Questions & Detailed Answers 2024
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MWSIdentify five requirements for an MWS apparatus that can be found in NFPA 1901. - correct 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. - correct answer Drain the piping pump and booster lines to prevent damage.
During MWS apparatus service testing the atmospheric air temperature should be between - correct
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. - correct 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. - correct answer 20 feet of hard suction hose.
Identify four pre-service test for an MWS apparatus equipped with a fire pump - correct 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. - correct answer 10 inches in 5 minutes.
Identify three critical items that should be included on MWS apparatus daily inspection checklist. -
correct answer Apparatus unit identification number, inspected by column, remarks column.
When maintaining MWS apparatus records, you should: - correct answer Refer to your departments
standard operating procedures for specific guidance.
Identify three items that are checked for leaks during the vacuum test. - correct answer Priming device,
hard suction hose, pump.
Priming test. - correct 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 - correct answer Checks accuracy of discharge readings obtained when
the pump is in operation.
Pumping test - correct answer Checks overall condition of the engine and pump.
Tank to pump flow rate test - correct answer Checks weather the piping between the MWS apparatus
water tank and fire pump meet NFPA 1901 standard.
Vacuum test - correct answer Check for leaks and different devices.
Engine speed check test - correct answer Checks the rate of the engine speed.
Pressure control test - correct 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: - correct
answer At least once a year or when it has undergone extensive pump repair.
Periodic documentation should capture things such as: - correct answer Safety inspections.
And MWS apparatus should be started with all electrical switches in the off position in order to: - correct
answer Start the engine without a load.
And MWS apparatus may have a steering system problems if the steering wheel can be rotated without
moving the front tires more than: - correct answer 10°
Tracking engine performance across time uses data collected in the: - correct answer Fuel, oil, and
mileage record.
The pressure control service test measures pressure control devices at three different points. They are: -
correct answer 90 psi, 150 psi, and 250 psi.
Think you understand the characteristics of an MWS apparatus?
What is the best explanation for characteristics of an MWS apparatus? - correct answer An individual
personality-each apparatus may perform, react, and handle differently.
All of the following statements about approaching an intersection are true except: - correct answer
True- you should always drive at a speed where you can come to a stop, if necessary, even if it slows you
down.
True- you should make eye contact with other drivers to make sure that they see you.
False- you should run a stop sign to save time if you can see that there is no other traffic.
True- you should stop at all red traffic signal is even if you lose time.
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