MWS CORRECT TEST PAPER QUESTIONS AND
ANSWERS SET A+
✔✔According to NFPA 1901, a discharge pressure relief valve must operate within: -
✔✔10 seconds after discharge pressure rises 30 psi above set level.
✔✔When a centrifugal pump operates? - ✔✔As 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. - ✔✔1. 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.
✔✔NFPA 1901 requires that an MWS apparatus that uses medium diameter hose
supply lines for filling should have at least__________ external fill connections piped
directly to the tank. - ✔✔One
✔✔When a fire scene is located down a narrow lane it is best to locate the dump site? -
✔✔at the intersection where the lane meets a thoroughfare
✔✔Identify FOUR true statements about gravity dump systems? - ✔✔a. Gravity dumps
usually employ 8 inch or larger round or square piping with a valve that extends to the
exterior of the apparatus.
b. Manually opened valves on gravity dumps may require someone to climb tot he top of
the MWS apparatus tank.
, e. Gravity dumps rely on natures gravitational pull to empty water from the tank.
f. The valve on the gravity dump may be designed to open manually or remotely.
✔✔During an MWS apparatus inspection, the lowest acceptable fuel gauge reading is?
- ✔✔At least 3/4 full
✔✔The purpose of the priming device test is to? - ✔✔evaluate how quickly the priming
device can create a vacuum to bring water through a pump to discharge hose.
✔✔Most jurisdictions prefer to draft from a static water source during service testing
because it? - ✔✔is a true test of the pumps ability
✔✔Identify TWO items that should be included on daily MWS apparatus records? -
✔✔Tire condition
coolant levels
✔✔Before driving over a guarded railroad crossing during an emergency response? -
✔✔Look both right and left and proceed cautiously
✔✔Allowing an MWS apparatus engine to idle over an extended period of time can lead
to all of the following EXCEPT? - ✔✔Engine fatigue
✔✔You should NEVER back an MWS apparatus? - ✔✔If you don't have at least one
spotter
✔✔When driving an MWS apparatus you should use a spotter under all of the following
conditions except? - ✔✔traveling forward on straight roads
✔✔NFPA rates all fire pumps to meet their capacity from a draft at? - ✔✔10 Feet of lift
✔✔If the total pressure loss is 15 PSI, what is required pump discharge pressure for
resupplying an ARFF? - ✔✔35 PSI
✔✔When hose diameter remains the same, friction loss varies with the square of the
increase in flow rate, if the gallons per minute triples? - ✔✔friction loss is nine times
greater
✔✔The best definition of water pressure is the? - ✔✔force of water per unit area
✔✔The hand method can be used for estimating the friction loss in a hoseline with a
diameter of ? - ✔✔2.5 inches
ANSWERS SET A+
✔✔According to NFPA 1901, a discharge pressure relief valve must operate within: -
✔✔10 seconds after discharge pressure rises 30 psi above set level.
✔✔When a centrifugal pump operates? - ✔✔As 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. - ✔✔1. 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.
✔✔NFPA 1901 requires that an MWS apparatus that uses medium diameter hose
supply lines for filling should have at least__________ external fill connections piped
directly to the tank. - ✔✔One
✔✔When a fire scene is located down a narrow lane it is best to locate the dump site? -
✔✔at the intersection where the lane meets a thoroughfare
✔✔Identify FOUR true statements about gravity dump systems? - ✔✔a. Gravity dumps
usually employ 8 inch or larger round or square piping with a valve that extends to the
exterior of the apparatus.
b. Manually opened valves on gravity dumps may require someone to climb tot he top of
the MWS apparatus tank.
, e. Gravity dumps rely on natures gravitational pull to empty water from the tank.
f. The valve on the gravity dump may be designed to open manually or remotely.
✔✔During an MWS apparatus inspection, the lowest acceptable fuel gauge reading is?
- ✔✔At least 3/4 full
✔✔The purpose of the priming device test is to? - ✔✔evaluate how quickly the priming
device can create a vacuum to bring water through a pump to discharge hose.
✔✔Most jurisdictions prefer to draft from a static water source during service testing
because it? - ✔✔is a true test of the pumps ability
✔✔Identify TWO items that should be included on daily MWS apparatus records? -
✔✔Tire condition
coolant levels
✔✔Before driving over a guarded railroad crossing during an emergency response? -
✔✔Look both right and left and proceed cautiously
✔✔Allowing an MWS apparatus engine to idle over an extended period of time can lead
to all of the following EXCEPT? - ✔✔Engine fatigue
✔✔You should NEVER back an MWS apparatus? - ✔✔If you don't have at least one
spotter
✔✔When driving an MWS apparatus you should use a spotter under all of the following
conditions except? - ✔✔traveling forward on straight roads
✔✔NFPA rates all fire pumps to meet their capacity from a draft at? - ✔✔10 Feet of lift
✔✔If the total pressure loss is 15 PSI, what is required pump discharge pressure for
resupplying an ARFF? - ✔✔35 PSI
✔✔When hose diameter remains the same, friction loss varies with the square of the
increase in flow rate, if the gallons per minute triples? - ✔✔friction loss is nine times
greater
✔✔The best definition of water pressure is the? - ✔✔force of water per unit area
✔✔The hand method can be used for estimating the friction loss in a hoseline with a
diameter of ? - ✔✔2.5 inches
