Mobile water supply
"Q" in the formula FL=C Q2 L represents: - Correct 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: - Correct Answer 16 psi
A major advantage of a positive displacement pump over a centrifugal pump is that it can: - Correct Answer Pump air,
making it self priming.
A major advantage of medium diameter hoses is their: - Correct 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: - Correct
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: - Correct 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: - Correct Answer
Start the engine without a load.
As hose diameter increases: - Correct 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: - Correct Answer A dramatic pressure failure of the tank.
Before you drive an MWS apparatus across a bridge, you should: - Correct 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: - Correct Answer Maneuvering/positioning.
During a resupply operation which formula is used to determine the pump discharge pressure (PDP)? - Correct
Answer PDP= Required intake pressure + TPL
During MWS apparatus service testing, the atmospheric air temperature should be between: - Correct Answer 0F-
100F
Filling an MWS apparatus from the top with a portable fill device, or an open hose butt, is: - Correct 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. - Correct 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. - Correct
Answer •Apparatus unit identification number
•Inspected by column
•Remarks column
Identify THREE items that are checked for leaks during the vacuum test. - Correct 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. - Correct Answer •Tachometer
"Q" in the formula FL=C Q2 L represents: - Correct 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: - Correct Answer 16 psi
A major advantage of a positive displacement pump over a centrifugal pump is that it can: - Correct Answer Pump air,
making it self priming.
A major advantage of medium diameter hoses is their: - Correct 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: - Correct
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: - Correct 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: - Correct Answer
Start the engine without a load.
As hose diameter increases: - Correct 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: - Correct Answer A dramatic pressure failure of the tank.
Before you drive an MWS apparatus across a bridge, you should: - Correct 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: - Correct Answer Maneuvering/positioning.
During a resupply operation which formula is used to determine the pump discharge pressure (PDP)? - Correct
Answer PDP= Required intake pressure + TPL
During MWS apparatus service testing, the atmospheric air temperature should be between: - Correct Answer 0F-
100F
Filling an MWS apparatus from the top with a portable fill device, or an open hose butt, is: - Correct 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. - Correct 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. - Correct
Answer •Apparatus unit identification number
•Inspected by column
•Remarks column
Identify THREE items that are checked for leaks during the vacuum test. - Correct 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. - Correct Answer •Tachometer
