Exam (elaborations)
MWS QUESTIONS AND ANSWERS 2024
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Exam of 8 pages for the course Mobile water supply at Mobile water supply (MWS)
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MWSIdentify TWO correct statements about conducting a daily inspection of an MWS
apparatus equipped with a fire pump? - answerConfirm that the foam tank level is full.
Operate the pump drive control
When conducting a service test using a static water source, you must have____feet of
hard suction hose for drafting. - answer20
Testing the discharge pressure gauge begins by: - answerDisconnecting all
preconnected hoselines and screwing all caps onto their discharges.
It is recommended that fuel, oil and mileage records be updated? - answeras
determined by the jurisdiction
When entering an intersection, you should? - answerMake eye contact with the other
drivers at or entering the intersection.
When driving through intersections requiring a stop, you must perform all of the
following steps EXCEPT: - answerturn on the flashers to indicate you are crossing
Identify the FOUR steps for passing through a straight section of a road or highway? -
answerMaintain apparatus speed
Check the side streets or roads
Check for oncoming traffic
Check the side and rear view mirrors
All of the following statements about driving an MWS apparatus through areas of
restricted horizontal and vertical clearances are true EXCEPT? - answeruse the
appropriate turn signal
Identify THREE things you should do when turning an MWS apparatus 180? -
answerBe aware of any obstructions in your line of travel.
Use the side view mirrors equipped on the MWS apparatus.
Make sure you can see your spotter.
Identify TWO correct statements about looping mains in a distribution grid? -
answerThey ensure that the water flows from two directions into hydrants
, They create constant flow and less sediment forms in the pipes.
Traditional strainer - answerMust have at least 24 inches of water above this type of
strainer or the water above the strainer or the water above the strainer will whirlpool.
Floating strainer - answerMay get around the 24 inch minimum depth with this type of
strainer but the filter can only draw water from the bottom.
low-level strainer - answerCan rest on the bottom of a pool or tank with a minimum of
two inches of water above to prevent whirlpool.
If water is flowing through 200 of 5 inch hose at 300 gpm then the theoretical friction
loss is approximately: - answer1.44
If the total pressure loss is 15 psi, what is the required pump discharge pressure for
resupplying an ARFF vehicle? - answer35 PSI
All of the following factors must be included when determining the total pressure loss
TPL EXCEPT: - answerPump pressure loss
Using the hand method, the estimated friction loss for 300 feet of 2 1/2 inch hose
flowing 200 gpm is approximately? - answer24 PSI
large diameter hoses are generally defined as hoses with a diameter between? -
answer4 and 6 inches
One characteristic of discharge pressure relief valves is they? - answerare slow to close
after being opened
According to NFPA 1901, a discharge pressure relief valve must operate within: -
answer10 seconds after discharge pressure rises 30 psi above set level.
When a centrifugal pump operates? - answerAs flow increases, discharge pressure
decreases; as impeller speed increases, discharge pressure increases.
Place steps for pumping from an MWS apparatus internal tank to an attack apparatus or
a nurse tanker once the MWS apparatus has been positioned in correct order. -
answer1. Deploy and connect a supply line
2. Make pump operational.
3. Open tank to pump valve.
4. Prime pump if necessary
5. Open the discharge valve slowly.
6. Set the throttle to the required engine pressure.
7. Set the pressure relief valve or governor.
8. Monitor gauges associated with pump operation and make decisions based on your
departments SOPs and experience.
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