MWS EVALUATION QUESTIONS AND ANSWERS
SET A+
✔✔15 ft of life should give you what percent of pump capacity - ✔✔70
✔✔12 inch of 1by 1 by 1 cube is what psi - ✔✔.434 psi
✔✔24 inches of 1 by 1 by 1 is what psi - ✔✔.868 ps
✔✔atmospheric pressure at sea level is - ✔✔14.7 PSI
✔✔the higher you go do you need more or less pressure to pump the same amount of
water - ✔✔more
✔✔APL only applies for what gpm - ✔✔350 or more
✔✔piston pump stream - ✔✔pulsates because of 3 stage cycle
✔✔rotary vane facts - ✔✔self priming
vane reduces need for maintenance
mounted off center
✔✔centrifigual pump facts - ✔✔not self priming, cant pump air
susceptible to grit and dirt
✔✔piston is used for what nozzles - ✔✔high pressure fog nozzles
✔✔rotary gear has - ✔✔2 meshed gears
✔✔discharges have what valve - ✔✔locking ball valves
✔✔pressure control device goes off after what psi in what time - ✔✔30psi in 10 sec
, ✔✔discharge pressure govenors ony only what pump - ✔✔centrifigual pumps
✔✔intake pressure relief valves attach to and set at what psi - ✔✔manifold set 10 psi
above
✔✔3 statements about positive displacement pumps - ✔✔there is piston and rotary
types
many pos pumps replaced with centrifigual
piston pumps forwards and backwards
✔✔to correct for lateral thrust wear on parts in centrifigul pumps the pump - ✔✔has
water enter the impeller from both sides
✔✔one characteristic of discharge pressure relief valves are they - ✔✔are slow to close
once opened
✔✔when approaching cone for water supply - ✔✔you will pull up on the passenger side
of mws
✔✔should the first or second portable tank be filled first - ✔✔fill the second once first is
full and in use
✔✔handling time - ✔✔fill site time + dump site time+ time to fill/ dump to make and
break
✔✔toal flow rate = - ✔✔fill time+dump time+ travel time
✔✔purpose of priming device test - ✔✔evaluate how quickly the priming device can
create a vacuum to bring water through the pump to a discharge hose
✔✔a priming device works by - ✔✔creating a partial vacuum
✔✔discharge pressure relief mist work within what time after what psi jump - ✔✔10
second after 30 PSI jump
✔✔for fill site to be successful use what pumper and mws combination - ✔✔use a
pumper connected to a hydrant to fill your mws
✔✔always use what at fill site - ✔✔portable water tanks
✔✔portable tank should be how much larger than MWS tank - ✔✔500 gal
✔✔methods of water discharge at dump site - ✔✔dump valve
SET A+
✔✔15 ft of life should give you what percent of pump capacity - ✔✔70
✔✔12 inch of 1by 1 by 1 cube is what psi - ✔✔.434 psi
✔✔24 inches of 1 by 1 by 1 is what psi - ✔✔.868 ps
✔✔atmospheric pressure at sea level is - ✔✔14.7 PSI
✔✔the higher you go do you need more or less pressure to pump the same amount of
water - ✔✔more
✔✔APL only applies for what gpm - ✔✔350 or more
✔✔piston pump stream - ✔✔pulsates because of 3 stage cycle
✔✔rotary vane facts - ✔✔self priming
vane reduces need for maintenance
mounted off center
✔✔centrifigual pump facts - ✔✔not self priming, cant pump air
susceptible to grit and dirt
✔✔piston is used for what nozzles - ✔✔high pressure fog nozzles
✔✔rotary gear has - ✔✔2 meshed gears
✔✔discharges have what valve - ✔✔locking ball valves
✔✔pressure control device goes off after what psi in what time - ✔✔30psi in 10 sec
, ✔✔discharge pressure govenors ony only what pump - ✔✔centrifigual pumps
✔✔intake pressure relief valves attach to and set at what psi - ✔✔manifold set 10 psi
above
✔✔3 statements about positive displacement pumps - ✔✔there is piston and rotary
types
many pos pumps replaced with centrifigual
piston pumps forwards and backwards
✔✔to correct for lateral thrust wear on parts in centrifigul pumps the pump - ✔✔has
water enter the impeller from both sides
✔✔one characteristic of discharge pressure relief valves are they - ✔✔are slow to close
once opened
✔✔when approaching cone for water supply - ✔✔you will pull up on the passenger side
of mws
✔✔should the first or second portable tank be filled first - ✔✔fill the second once first is
full and in use
✔✔handling time - ✔✔fill site time + dump site time+ time to fill/ dump to make and
break
✔✔toal flow rate = - ✔✔fill time+dump time+ travel time
✔✔purpose of priming device test - ✔✔evaluate how quickly the priming device can
create a vacuum to bring water through the pump to a discharge hose
✔✔a priming device works by - ✔✔creating a partial vacuum
✔✔discharge pressure relief mist work within what time after what psi jump - ✔✔10
second after 30 PSI jump
✔✔for fill site to be successful use what pumper and mws combination - ✔✔use a
pumper connected to a hydrant to fill your mws
✔✔always use what at fill site - ✔✔portable water tanks
✔✔portable tank should be how much larger than MWS tank - ✔✔500 gal
✔✔methods of water discharge at dump site - ✔✔dump valve
