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Hale Pump Manual > Section 1.1-1.27 > Flashcards

Section 1.1-1.27 Flashcards

0
Q

Speed or rpm if the speed of rotation increases with flow held constant the water pressure

A

increases

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1
Q

A centrifugal pump operates on the principle that centrical force is created by a

A

rapidly spinning disk

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2
Q

The centrical pump is preferred by the fire protection service due to its ability to fully utilize any _______ reducing the amount of work done by the pump

A

positive suction inlet pressure

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3
Q

Decreased maintenance is aided by the fact he centrifugal pump has basically only _____ moving parts that _____ _______

A

two

impeller and the shaft

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4
Q

The number of impellers on a common shaft determines the number of _____

A

pump stages

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5
Q

Hail single stage pumps are of size and design to attach to the _______ of commercial and custom chassis

A

chassis rails

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6
Q

The pump is driven from the trucks _______

A

main driveline

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7
Q

Generally the pump consists of the following major components
6 things

A 
Pump body
Impeller and shaft components
Gearbox
Priming system
Pressure control device
Valves
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8
Q

Hale single stage pumps use a ______ to develop the required volume and pressure

A

single impeller

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9
Q

Water enters the suction channel on ______ of the impeller

A

both sides

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10
Q

Water enters the suction channel on both sides of the impeller thereby maintaining ______

A

axial balance

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11
Q

_______ on the Q Max strip water from the rotating impeller and direct it to the discharge path

A

Dual wadcutters

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12
Q

The primary difference between a single stage into stage pump is that the single stage has only one ______ and no transfer valve to switch between volume and pressure operation

A

impeller

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13
Q

A transfer valve is a two position valve that permits the impellers in a two stage pump to be operated in parallel (_____) or series (_____)

A

volume

pressure

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14
Q

A ______ allows the operator of a two stage pump to select volume or pressure operations

A

transfer valve

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15
Q

The transfer valve is in all _______ waterway device that can be transferred between pumping mode with 2 1/2 terns of its control hand wheel

A

bronze

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16
Q

In deciding which range to pump pressure or volume choose the one that gives the desired flow and pressure at the _____ engine speed

A

lowest

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17
Q

When a change of range is desired slowed down to ______ speed and see if the transfer valve to the desired range

A

idle

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18
Q

When shifting the transfer valve from volume to pressure operation the pressure will be ________

A

doubled

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19
Q

Cavitation occurs when a centrifugal pump is attempting to______

A

discharge more water than it is receiving

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20
Q

When cavitation occurs a _______ is created near the eyes of the impeller

A

vacuum

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21
Q

Cavitation is often referred to as the

A

pump running away from the water supply

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22
Q

The most reliable indication that a pump is approaching cavitation is when an increase in engine RPM does not cause an increase in the _____

A

pump discharge pressure

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23
Q

The most common way to eliminate cavitation is to decrease the _________

A

amount of water being discharged

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24
Q

The most common way to aluminate cavitation is to decrease the amount of water being discharged this is accomplished by ________

A

decreasing engine speed or closing discharge valves

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25
Q

The standard pump body and related parts are constructed from ____________ with a minimum tensile strength of 30,000 psi

A

fine grain alloy cast iron,

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26
Q

The Q Max and Q2 pumps have two large suction inlets on the _______

A

left and right side

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27
Q

Impeller inlets are on opposite sides of the pump to balance _____ forces

A

axial

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28
Q

Discharges are on opposite sides to balance _____ forces

A

radial

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29
Q

The impeller provides _____ to the water

A

velocity

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30
Q

Water enters the rotating impeller at the _____and is confined by the shrouds and veins mounted in the impeller to build pressure

A

intake or eye

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31
Q

The vanes guide water from the inlet to the discharge and reduce the ______ of the spinning water

A

turbulence

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32
Q

Vanes curve ______ from the direction of rotation so water moves toward the outer edge

A

away

33
Q

___________ prevent the water that is pressurized and leaving the pump volute from returning to the intake of the impeller

A

Clearance rings

34
Q

Centrifugal pumps have clearance Rings at the impeller intake to ________

A

prevent leakage

35
Q

A clearance ring usually has a radio clearance of about ._____ inch or 0.015 inch diameter

A

.0075

36
Q

Clearance ring wear is due to ______

A

foreign material found in the water

37
Q

Clarence rings are designed for replacement as the clearance increases from ________

A

usage and wear

38
Q

If a pump is operated without water for extended periods or without discharging water, it may ______

A

usage and wear

39
Q

There are two types of pump seals available for hail midship pumps, they are ___________

A

packing and mechanical

40
Q

Packing available on Q Max pumps forms a nearly _______ at the point where the shaft passes from the inside to the outside of the pump

A

watertight seal

41
Q

Packing material is cool with _____

A

pump water

42
Q

The packing gland should not be excessively _______, or the material will lose it’s built in lubrication and dry out

A

tightened

43
Q

The single packing gland is located on the ___________

A

low pressure side of the pump.

44
Q

It’s split design promote ease of _______

A

repacking

45
Q

The packing nut is a full circle threaded type to exert a _________e unpacking and to prevent copying in uneven packing load

A

uniform pressur

46
Q

The packing is easily adjusted with a _______

A

rod or screwdriver

47
Q

The packing rings are made of a combination of unique materials and have _________to protect the pump shaft from galvanic corrosion

A

sacrificial zinc separators

48
Q

There are four common types of centrifugal pump drives used with firefighting apparatus

A

– Operating from the truck chassis driveshaft split shaft gearbox
– Operation from a separate engine
– Operation from the front of the truck chassis engine front engine PTO crankshaft
– Operation from a PTO from the truck transmission, a PTO before the engine drive transmission or a PTO from the four-wheel-drive transfer case

49
Q

The most common pump Drive is the _______

A

split shaft your box

50
Q

Midship pumps are so named because of their _____ on the fire apparatus

A

location

51
Q

If the gearbox is equipped with a powershift system an in cab control valve is provided for mode selection this control locks in place for pump operation, ________ are provided to alert the operator when the gearbox has fully shifted from road to pump position.

A

indicator lights

52
Q

Priming pumps are used to _______ they are designed to evacuate air in the suction hose and the pump.

A

create a vacuum

53
Q

The vacuum created by primer allows atmospheric pressure to water from the open source through the suction hose and into the pump

A

push

54
Q

Hale centrical midship pumps use ____________ pumps for priming

A

rotary vein positive displacement

55
Q

A positive displacement pump moves a specified amount of _______ with each revolution

A

air or fluid

56
Q

The hail TPM total pressure master relief valve system is designed to automatically relieve ______ when operating from draft or positive incoming flows

A

excess pump pressure

57
Q

The TPM system self restores to the non-relieving position when excess of presser is ________

A

no longer present

58
Q

The hale total pressure master relief valve system includes a sensing valve connected to the _______ of the pump that works in conjunction with a pressure master control on the pump panel to give complete control over the entire system

A

inlet side

59
Q

The operating point is set by the pressure master control

A

T

60
Q

The TPM relief valve system is a ________, consisting of an internal relief valve which bypasses water to the suction side of the pump, and external relief dump valve with sensing valve attached to discharge water to the atmosphere, and a single panel mounted control valve to provide control a pump pressure within an FDA required limits to the pump operator

A

mechanical system

61
Q

The TPM system functions by monitoring and controlling pump pressure and relieves excessive pressure by first utilizing the _______,if excessive pressure remains and there is positive pressure on the suction a secondary external relief valve response by discharging excessive pressure to the __________

A

internal relief valve

atmosphere

62
Q

The staging of internal and extra no relief valves to operate in series ensures maximum protection against overpressure and eliminates the indiscriminate discharging of ________

A

water to the ground

63
Q

Model K auxiliary heat exchanger/cooler

NFPA 1901 requires a supplementary heat exchanger cooling system for the pump drive engine during ________

A

pumping operations

64
Q

Thermal relief valve TRV
This valve prevents the overheating of the pump under certain operating conditions, when the temperature exceeds _______°F the valve automatically opens and discharges a small amount of water either to the ground or into the water tank allowing cooler water to enter the pump

A

120

65
Q

At least one full flow suction valve with locking handle is normally mounted on the pump the body of each suction valve connects to the pump suction with a maximum of _______ between the valve and the pump suction

A

one long sweet 90° elbow

66
Q

________ valves regulate the amount of water leaving a pump

A

Discharge

67
Q

Each discharge valve includes a locking device that permits operation in any position from_________

A

fully opened to fully closed

68
Q

The 2 1/2 inch discharge valves are ________ with a locking handle

A

quarter turn ball type

69
Q

Eat discharge valve on a hale pump may be equipped with a drain. Opening the drain before uncoupling the hose relieves the pressure in the line

A

T

70
Q

There are two types of drain valves available from hell they are either the _____________

A

sliding plug type or a screw knob style

71
Q

The sliding plug type drain valves have a ______ mounted on operators panel

A

pull handle

72
Q

The screw knob style drain valve has facilities to connect up to _______ individual drain lines

A

seven

73
Q

The drain valve control knob is located on the operators panel, turning the control knob ________ will open the drain valve

A

counterclockwise

74
Q

The hale android system helps prevent damage caused by _____ corrosion with in the pump

A

galvanic

75
Q

Galvanic action pits the pump and pump shaft material through the _____ of water in the pump

A

electrolysis

76
Q

The popularity of noncorrosive water tanks and piping has ______ the incidences of this type of corrosion in today’s fire pumps

A

increased

77
Q

The hale anode system provides a _______ metal which helps to diminish or prevent pump and pump shaft galvanic corrosion

A

sacrificial

78
Q

.Hale anode will fit in any hale truck mounted pump regardless of _________

A

age or model

79
Q

It is recommended that one anode is installed on the ________ side of the pump

A

suction side and one is installed on the discharge

80
Q

Hail booster pumps offer the added dimension of ____________for use with midship pumps. The booster is ideal for high-pressure hose reel operations

A

low volume and high-pressure

Hale Pump Manual (4 decks)

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