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Engineers Test Exam 13 > Pierce Pumping > Flashcards

Pierce Pumping Flashcards

1
Q

Intake Relief Valve set at

A

250 psi

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2
Q

When operating the pump, be sure to open at least_____. If the pump runs for a few minutes completely closed, it may heat the water enough
to scald someone when the valve is opened. Overheating can damage the seals and other pump parts

A

one discharge valve slightly to prevent the pump

from overheating

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3
Q

It is classified as a nonpositive displacement pump since it does _____.

A

not pump a definite amount of water with each revolution.

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4
Q

It imparts

velocity to the water and ____.

A

coverts it to pressure within the pump itself.

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5
Q

The impeller transmits energy in the form of ____ to the water.

A

velocity

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6
Q

The housing collects the water and confines it (the water) within the housing thus ______.

A

converting water velocity to water

pressure.

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7
Q

The first indication that wear is becoming a problem in the pump is when ____ is
required to pump in the rated capacity in pump tests,

A

increased engine rpm

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8
Q 
Whenever the pump is delivering more than approximately \_\_\_\_of its rated capacity of 1500 gpm,
the parallel (volume) position should be selected on the transfer valve
A

70%

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9
Q

If equipped with 4WD, engage the water pump with the transfer case in ____. Vehicle will move if
the pump is engaged when in 4WD. Death or injury may occur.

A

2WD ONLY.

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10
Q

In manual override mode, the pump speed will be controlled only by the ____.

A

throttle pedal.

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11
Q

Keep pump water cool. Do not operate the pump for extended periods with the discharge valves closed or the pump may
overheat. The pump is fitted with a ______ to help prevent overheating.

A

thermal relief valve

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12
Q

Air pressure gauges should indicate _______. Pump may not shift out of road position if the air pressure is below 80 PSI.

A

80 PSI or greater.

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13
Q

Flip pump shift control lever DOWN to engage pump. Wait _____ for pump engagement.

A

up to 4 seconds

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14
Q

Pump may not engage if gear teeth fail to mesh. In this case:

A

Shift to N → Shift to R → Shift to N → Shift to D

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15
Q

If the speedometer indicates some value of road speed _______ AND the vehicle is not moving,
the pump is successfully engaged.

A

(approx. 12-18 MPH)

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16
Q

Manual Pump Shift Override:
If the _____ the pump, THEN use the manual pump shift instead of the air shift. This is a manual
override and requires____ to operate.

A

air shift fails to engage / two people

17
Q

Manual Pump Shift Override:

  1. Position one person in the ____ and one person at the ____.
  2. Shift transmission Into NEUTRAL (N).
  3. Apply parking brake.
A

driver’s seat / pump panel

18
Q

Manual Pump Shift Override:

  1. Apply service brake by pressing and holding the brake pedal.
  2. Place pump shift control in ____
  3. Engage the manual shift handle
A

NEUTRAL

19
Q

NOTE: Depending on pump model, _____ the manual shift T-handle, using steady pressure

A

pull in or push out

20
Q

Manual Pump Shift Override:

  1. Place pump shift control in ___ position.
  2. Shift the transmission into DRIVE (D).
A

PUMP

21
Q

Pump Disengagement:

WAIT____ after shifting to NEUTRAL (N) for pump drive shaft to stop spinning

A

3-5 seconds

22
Q

Pump Disengagement:
Speedometer should read _____ . If the speedometer reads ANY speed e.g. 1-10 MPH or more), then repeat
the entire procedure.

A

0 MPH

23
Q

If high pressure is required ______ 13.8 bar, operating the pump in the PRESSURE position may be necessary
even if it means closing one or more valves to reduce volume and avoid cavitation.

A

more than 200 psi,

24
Q

Slow engine speed to reduce the discharge pressure to _____ (5.2
bar) or less while changing from pressure to volume.

A

75 psi

25
Q

Open tank-to-pump valve:
Allow ____ for water to flood
the pump.

A

30 seconds

26
Q

In no pressure increase is observed, operate the ___ or ____ to purge any trapped air in
the pump.

A

priming pump / crack a valve

27
Q

Maximum inlet pressure for tank filling is ____

A

100 psi

28
Q

A dedicated recirculating valve opens a small water flow from the pump to the tank. The flow through this line
___ the pump. The recirculating line does not let water flow from ____

A

cools / the tank to the pump,

29
Q

Keep track of water temperature:
Touch the outlet pipe to see how warm it is. If it is ____ to the touch, it is time to bring fresh, cool water into
the water tank or turn OFF pump.

A

hot

30
Q

Keep track of water temperature:
Watch tank temperature gauge (if your fire department selected this option). When temperature reaches
_____ then add fresh cool water or turn OFF pump.

A

175° F

31
Q

OPEN the engine cooler valve to provide more engine cooling when air temperature is above _____,
or if engine overheats

A

80 degrees F,

32
Q

Supplying Water to Pump From Open or Draft Supply:

Do not use pump without the _____.

A

strainer or inlet screen installed.

33
Q

Supplying Water to Pump From Open or Draft Supply:

Immerse intake strainer at least ____ water surface to prevent pump from drawing air.

A

two feet below

34
Q

Supplying Water to Pump From Open or Draft Supply:
Operate priming pump until main suction gauge shows a vacuum of _____ and main
pressure gauge shows a positive pressure. NOTE: If you are not able to achieve prime within ____.

A

approximately 20” of Hg / 45

seconds, stop and investigate.

35
Q

Exercise a transfer valve operation check from pressure to volume modes weekly (Mondays) by
performing the operation _____.

A

two times.

36
Q

Refilling the Tank:

OPEN the tank fill valve slowly to ____ to divert some supply water into the water tank.

A

¼ OPEN

Engineers Test Exam 13 (12 decks)

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