Mobile Water Supply Questions with Correct Answers Rated A+
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Course
Mobile water supply
Institution
Mobile Water Supply
A major advantage of a positive displacement pump over a centrifugal pump is that it can: - Pump air, making it self-priming.
The efficiency of many priming devices is improved through the use of: - An oil-injection system
The big advantage of centrifugal pumps over positive displacement pu...
Mobile Water Supply Questions with Correct
Answers Rated A+
A major advantage of a positive displacement pump over a centrifugal pump is that
it can: - ✅✅ Pump air, making it self-priming.
The efficiency of many priming devices is improved through the use of: - ✅✅
An oil-injection system
The big advantage of centrifugal pumps over positive displacement pumps is that
centrifugal pumps: - ✅✅ Can provide water in variable pressures and volumes.
On large diameter lines, gate valves are most often controlled by: - ✅✅
Handwheels
To disengage the pump on PTO-driven pumps, begin by: - ✅✅ Reducing the
engine speed to idle.
One recommended strategy for cooling an overheating fire pump is to: - ✅✅
Circulate water back to the tank
It is important to monitor the water level in the onboard tank because? - ✅✅ You
need to know if the incident requires additional water before the tank is empty.
When performing drafting operations, for a pump to operate at its rated
capacity______ inches of water must be above a traditional strainer. - ✅✅ 24
inches
Filling an MWS apparatus from the top with a portable fill device, or an open hose
butt, is: - ✅✅ Only used when an MWS apparatus has no other way of being
filled than through a top opening.
Identify two disadvantages of using a nurse tanker operation in a water shuttle. -
✅✅ •All MWS apparatuses in the water shuttle are required to have a sizable fire
pump
•Dumping time for each MWS apparatus is significantly higher.
, If the portable tanks at the dump site become empty during an emergency then the:
- ✅✅ Dump site pumper should use its tank.
To determine the total flow rate using IFSTA's formula, divide the amount of water
dumped by the: - ✅✅ Travel time plus the handling time.
Both the full site time and the dump site time include the time spent: - ✅✅
Maneuvering/positioning.
Identify two advantages of having remotely operated valves as part of a gravity
dump system. - ✅✅ •Increases safety by eliminating the need for someone to
climb to the top of the apparatus tank.
•Reduces the chance of someone being pinched between the apparatus and the
portable tank.
You are stationed in Alaska in December. You've 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: - ✅✅ Drain the
piping, pump, and booster lines to prevent damage.
When testing the priming device on an MWS apparatus with a fire pump with a
capacity less than 1,500 gpm, the priming device should be able to create the
necessary vacuum in 30 seconds to lift water 10 feet through: - ✅✅ 20 feet of
hard suction hose.
Identify four pre-service for an MWS apparatus equipped with a fire pump. -
✅✅ •Road test
• Independent pump certification tests
• Purchase acceptance tests
• Hydrostatic tests
Identify three items that are checked for leaks during the vacuum test. - ✅✅
•Priming device
• Hard suction hose
• Pump
Identify three pieces of equipment needed to conduct service testing on an MWS
apparatus equipped with a fire pump. - ✅✅ •Tachometer
•Smoothbore tips
•External test gauges
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