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Pumping And Aerial Driver Operator Handbook > 9 Fire Pump Theory > Flashcards

9 Fire Pump Theory Flashcards

1
Q

Positive displacement pump using one or more reciprocating Pistons to force water from the pump chamber

A

Piston pump

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2
Q

Type of pump commonly used for primer pumps

A

Rotary gear pump

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3
Q

Pump with one or more impellers that rotate and utilize forced to move the water modern fire pumps are of this type

A

Centrifugal pump

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4
Q

Three main factors that influence a centrical fire pump discharge pressure

A

Amount of water being discharged.
Speed at which impeller is turning.
Pressure of water when it enters the pump

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5
Q

Centrifugal pump is unable to pump air and is therefore not

A

Self priming

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6
Q

Two-stage pump or multistage pump operates in volume position when they are pumping in what

A

Parallel

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7
Q

Multistage pump operates in the pressure position when it is pumping in what

A

Series

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8
Q

If there’s any question as to the correct position for the transfer valve and a multistage pump the best is to operate in what mode

A

In parallel, volume mode

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9
Q

What is the essential part for the operation of a multistage pump

A

Clapper or check valve

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10
Q

Multistage pumps with the ability for pumping high pressures are especially useful for what application

A

Pumping tall high-rise standpipe or sprinklers

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11
Q

True false positive displacement pump potential damage can result from shutting off discharges

A

True

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12
Q

What happens in a centrifugal pump when the discharges are closed

A

The water is heated and it builds up

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13
Q

To prevent water temperature from building up in a centrifugal pump operator do

A

Open the tank fill valve to circulate water

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14
Q

True false generally when the pump is operating under pressure water should trip at a rate specified by the manufacture from the packing but not run as a steady stream

A

True

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15
Q

What happens if the pump is not used for an extended period of time

A

The packing may dry out and cause excessive leaking

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16
Q

Centrifugal pumps rely on what force of action to provide the pressure needed to achieve proper water discharge pressure

A

Velocity of the water produced by centrical force

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17
Q

Pumps powered by gasoline or diesel engines independent of the vehicle drive engine are examples of

A

Auxiliary pumps

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18
Q

Auxiliary palms generally have the capacity to pump what volume

A

500 GPM or less

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19
Q

Mechanism that allows a vehicle engine to power equipment such as a pump it is typically attached to the transmission

A

Power take off. PTO

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20
Q

Front mount pumps typically have a pumping capacity of up to

A

1250 gpm

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21
Q

Fire pump mounted in front of the vehicle and powered off the crankshaft

A

Front mount pump

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22
Q

In order to determine if the pump is engaged and operator can check what gauge in the cab

A

Speedometer, between 10 to 15 mph

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23
Q

Type of power system that runs off of the driveshaft to a transfer case using chains or belts to operate the pump

A

Split shaft system

24
Q

Piping of the pump system must be capable of withstanding hydrostatic test of how many PSI

A

500 psi before being placed in the service

25
Q

Pumpers with a capacity of 500 GPM or less should have piping capable of flowing how many GPM

A

250 gpm

26
Q

Conference with the capacity of 500 GPM or more should be able to flow how much through it’s piping

A

At least 500 gpm

27
Q

Pumps with a capacity of greater than 750 gallons per minute must be equipped with how many two and half inch discharges

A

At least two

28
Q

Pump rated less than 750 GPM are required to have how many 2.5 inch discharges

A

Only one

29
Q

What size pipe must supply 1.5-2” discharges

A

At least 2”

30
Q

For water tanks less than 1000 gallons the tank fill valve pipe must be how big

A

At least 1”

31
Q

For water tanks greater than 1000 gallons in the tank fill line must be at least how large

A

At least 2 inches

32
Q

A valve that circulates water back through the tank or dumps onto the ground to keep the pump cool

A

Circulator valve or recirculator valve

33
Q

For prolonged operations it may be necessary to do what to keep the pump and water cool

A

Discharge water through a dump line or hose on the ground.

34
Q

NFPA requires all intake or discharges that are 3 inches or greater be equipped with a slow acting control valve to reduce water hammer. Opening action shouldn’t take less than how long

A

3 seconds

35
Q

What can be used to drain the line if the hose is unable to be bled off

A

Discharge drain valve

36
Q

In order to drain booster hose during freezing temperatures may be necessary to do what in addition to opening the drain

A

Unravel and drain the hose

37
Q

How fast does a pressure relief valve need to kick in

A

3-10 seconds after pressurize

38
Q

Pressure relief valve must prevent pressure from exceeding how many psi above the set level

A

30 psi

39
Q

Two types of pressure relief valve

A

Leave on discharge side. Relieve pressure on intake side.

40
Q

Most common pressure relief valve

A

Pilot valve that opens and reroutes water back to the intake

41
Q

Although pressure relief valves Quick to react they are somewhat slower to

A

Reset back to the closed position

42
Q

Is generally recommended that the intake relief valve be set to open when the intake pressure rises more than how many PSI above necessary operating pressure

A

10 psi

43
Q

Pressure control device that controls engine speed eliminating hazardous conditions that result from excess pressure’s

A

Pressure governor

44
Q

Electronic governors also feature cavitation protection by returning the engine idle when intake pressure drops below how many PSI

A

30 psi

45
Q

Most modern pumpers use what type of primer motor

A

Positive displacement rotary vein and rotary gear type

46
Q

What must be checked in the oil reservoir for the priming pump to make sure it is free of dirt and so that it operates appropriately as the tank drained

A

Oil reservoir vent

47
Q

an air primer uses the air compressor to supply air to a jet pump that creates what effect to prime the pump

A

Venturi affect

48
Q

Although not required what to gauges or indicators are recommended for installation on the pump panel

A

Automatic transmission temperature gage, fuel level

49
Q

Two primary gauges operator uses to determine water pressure entering and leaving pump

A

Master intake and discharge gauge

50
Q

The master intake and discharge gauge is usually calibrated from 0 to 600 PSI and what level to indicate vacuum

A

0-30 inches of mercury for vacuum on the negative side

51
Q

When drafting as the pump speed increases demand increases on the draft, when the vacuum reading approaches what reading, the pump is nearing its capacity and unable to supply additional lines

A

20 inches of mercury negative

52
Q

What is allowed to be used as a substitute for individual pressure discharge gauges

A

Flowmeter readouts

53
Q

Even with a flowmeter system and use the apparatus is still required to have what

A

Master intake and master discharge pressure gauges

54
Q

Throttle lock that can be turned clockwise or counterclockwise to achieve pressure is also known as

A

Vernier throttle

55
Q

The primary function of an auxiliary cooling system is to control the temperature of coolant in what during pumping operations

A

The apparatus engine

56
Q

In extreme cases when the engine is overheating and the auxiliary cooling systems don’t work what can be done for a very brief time to cool the motor while interior crews withdraw

A

Directly hose line through the radiator of the motor

Pumping And Aerial Driver Operator Handbook (12 decks)

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