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Mobile water supply Exam Graded A+
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Mobile water supply Exam Graded A+
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Mobile water supply Exam Graded A+"Q" in the formula FL=C Q2 L represents: - ANSWER-Flow rate
A hose has a flow rate of 500 gpm with a friction loss of 4 psi. If the flow rate increases
to 1,000 gpm, then the friction loss will increase to: - ANSWER-16 psi
A major advantage of a positive displacement pump over a centrifugal pump is that it
can: - ANSWER-Pump air, making it self priming.
A major advantage of medium diameter hoses is their: - ANSWER-Flexibility for use as
an attack, relay, or supply line.
All of the following statements about parking an MWS apparatus near a railroad track
are true EXCEPT: - ANSWER-Park on the opposite side of the tracks as the incident.
An important feature of most screw-on intake pressure relief valves is that they: -
ANSWER-Have bleeder valves to vent air when a connected line is being charged.
An MWS apparatus should be started with all electrical switches in the OFF position in
order to: - ANSWER-Start the engine without a load.
As hose diameter increases: - ANSWER-Friction loss DECREASES
Before performing a quick-fill operation you should make sure the tank vents are open
because failure to have adequate venting during this operation could result in: -
ANSWER-A dramatic pressure failure of the tank.
Before you drive an MWS apparatus across a bridge, you should: - ANSWER-Compare
the weight of the MWS apparatus to the bridge's capacity.
Both the full site time and the dump site time include the time spent: - ANSWER-
Maneuvering/positioning.
During a resupply operation which formula is used to determine the pump discharge
pressure (PDP)? - ANSWER-PDP= Required intake pressure + TPL
During MWS apparatus service testing, the atmospheric air temperature should be
between: - ANSWER-0F-100F
Filling an MWS apparatus from the top with a portable fill device, or an open hose butt,
is: - ANSWER-Only used when an MWS apparatus has no other way of being filled than
through a top opening.
, identify FOUR pre-service for an MWS apparatus equipped with a fire pump. -
ANSWER-•Road test
• Independent pump certification tests
• Purchase acceptance tests
• Hydrostatic tests
Identify THREE critical items that should be included on an MWS apparatus daily
inspection checklist. - ANSWER-•Apparatus unit identification number
•Inspected by column
•Remarks column
Identify THREE items that are checked for leaks during the vacuum test. - ANSWER-
•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. - ANSWER-•Tachometer
•Smoothbore tips
•External test gauges
Identify TWO advantages of having remotely operated valves as part of a gravity dump
system. - ANSWER-•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.
Identify TWO correct statements about hydrants: - ANSWER-• 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.
Identify TWO disadvantages of using a nurse tanker operation in a water shuttle. -
ANSWER-•All MWS apparatuses in the water shuttle are required to have a sizable fire
pump
•Dumping time for each MWS apparatus is significantly higher.
Identify TWO types of apparatus required to operate an effective water shuttle. -
ANSWER-•Pumper or fire apparatus
•MWS apparatus
If the portable tanks at the dump site become empty during an emergency then the: -
ANSWER-Dump site pumper should use its tank.
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