Mobile water supply Questions and Answers with complete solution

Mobile water supply
The pressure control service test measures pressure control devices at three different
points. They are: - ✔️✔️90 psi, 150 psi, and 250 psi.


A major advantage of a positive displacement pump over a centrifugal pump is that it
can: - ✔️✔️Pump air, making it self priming.

Before you drive an MWS apparatus across a bridge, you should: - ✔️✔️Compare the
weight of the MWS apparatus to the bridge's capacity.

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

When performing a vacuum service test, once the engine is turned off, the column of
mercury should fall no more than: - ✔️✔️10 inches in 5 minutes

Tracking engine performance across time uses data collected in the: - ✔️✔️Fuel, oil,
and mileage record.

, Identify THREE critical items that should be included on an MWS apparatus daily
inspection checklist. - ✔️✔️•Apparatus unit identification number
•Inspected by column
•Remarks column

An MWS apparatus should be started with all electrical switches in the OFF position in
order to: - ✔️✔️Start the engine without a load.

During MWS apparatus service testing, the atmospheric air temperature should be
between: - ✔️✔️0F-100F

NFPA 1911 requires an MWS apparatus equipped with a fire pump to be service tested:
- ✔️✔️At least once a year or when it has undergone extensive pump repair.


When maintaining MWS apparatus records, you should: - ✔️✔️Refer to your dept.
SOPs for specific guidance.


All of the following statements about parking an MWS apparatus near a railroad track
are true EXCEPT: - ✔️✔️Park on the opposite side of the tracks as the incident.

Starting an MWS apparatus in the correct order: - ✔️✔️1. Disconnect all aux. electrical
& air sources.
2. Turn on apparatus battery
3.Start the engine
4.Observe the gauges
5.Check seat, mirrors, and steering wheel
6.Check that all crew members have fastened their seat belts

The definition of lift is: - ✔️✔️The vertical distance from the surface of the water to the
middle of the intake.

Place the codes hydrants in order of capacity from LEAST capacity to GREATEST. -
✔️✔️1. Red
2. Orange
3. Green
4. Light blue

Identify TWO correct statements about hydrants: - ✔️✔️• Grid systems with large
supply mains and looping secondary mains generally have less friction.

• if hydrants are color-coded, select a light blue hydrant when responding to a large
incident and be sure to test the flow before connecting the hydrant to the fire pump.