Section 1.1-1.27

Question 0

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

Answer 0

increases

Question 1

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

Answer 1

rapidly spinning disk

Question 2

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

Answer 2

positive suction inlet pressure

Question 3

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

Answer 3

two

impeller and the shaft

Question 4

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

Answer 4

pump stages

Question 5

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

Answer 5

chassis rails

Question 6

The pump is driven from the trucks _______

Answer 6

main driveline

Question 7

Generally the pump consists of the following major components
6 things

Answer 7

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

Question 8

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

Answer 8

single impeller

Question 9

Water enters the suction channel on ______ of the impeller

Answer 9

both sides

Question 10

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

Answer 10

axial balance

Question 11

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

Answer 11

Dual wadcutters

Question 12

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

Answer 12

impeller

Question 13

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

Answer 13

volume

pressure

Question 14

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

Answer 14

transfer valve

Question 15

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

Answer 15

bronze

Question 16

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

Answer 16

lowest

Question 17

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

Answer 17

idle

Question 18

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

Answer 18

doubled

Question 19

Cavitation occurs when a centrifugal pump is attempting to______

Answer 19

discharge more water than it is receiving

Question 20

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

Answer 20

vacuum

Question 21

Cavitation is often referred to as the

Answer 21

pump running away from the water supply

Question 22

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

Answer 22

pump discharge pressure

Question 23

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

Answer 23

amount of water being discharged

Question 24

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

Answer 24

decreasing engine speed or closing discharge valves

Question 25

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

Answer 25

fine grain alloy cast iron,

Question 26

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

Answer 26

left and right side

Question 27

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

Answer 27

axial

Question 28

Discharges are on opposite sides to balance _____ forces

Answer 28

radial

Question 29

The impeller provides _____ to the water

Answer 29

velocity

Question 30

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

Answer 30

intake or eye

Question 31

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

Answer 31

turbulence

Question 32

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

Answer 32

away

Question 33

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

Answer 33

Clearance rings

Question 34

Centrifugal pumps have clearance Rings at the impeller intake to ________

Answer 34

prevent leakage

Question 35

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

Answer 35

.0075

Question 36

Clearance ring wear is due to ______

Answer 36

foreign material found in the water

Question 37

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

Answer 37

usage and wear

Question 38

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

Answer 38

usage and wear

Question 39

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

Answer 39

packing and mechanical

Question 40

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

Answer 40

watertight seal

Question 41

Packing material is cool with _____

Answer 41

pump water

Question 42

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

Answer 42

tightened

Question 43

The single packing gland is located on the ___________

Answer 43

low pressure side of the pump.

Question 44

It's split design promote ease of _______

Answer 44

repacking

Question 45

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

Answer 45

uniform pressur

Question 46

The packing is easily adjusted with a _______

Answer 46

rod or screwdriver

Question 47

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

Answer 47

sacrificial zinc separators

Question 48

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

Answer 48

– 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

Question 49

The most common pump Drive is the _______

Answer 49

split shaft your box

Question 50

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

Answer 50

location

Question 51

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.

Answer 51

indicator lights

Question 52

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

Answer 52

create a vacuum

Question 53

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

Answer 53

push

Question 54

Hale centrical midship pumps use ____________ pumps for priming

Answer 54

rotary vein positive displacement

Question 55

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

Answer 55

air or fluid

Question 56

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

Answer 56

excess pump pressure

Question 57

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

Answer 57

no longer present

Question 58

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

Answer 58

inlet side

Question 59

The operating point is set by the pressure master control

Answer 59

T

Question 60

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

Answer 60

mechanical system

Question 61

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 __________

Answer 61

internal relief valve atmosphere

Question 62

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

Answer 62

water to the ground

Question 63

Model K auxiliary heat exchanger/cooler | NFPA 1901 requires a supplementary heat exchanger cooling system for the pump drive engine during ________

Answer 63

pumping operations

Question 64

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

Answer 64

120

Question 65

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

Answer 65

one long sweet 90° elbow

Question 66

________ valves regulate the amount of water leaving a pump

Answer 66

Discharge

Question 67

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

Answer 67

fully opened to fully closed

Question 68

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

Answer 68

quarter turn ball type

Question 69

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

Answer 69

T

Question 70

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

Answer 70

sliding plug type or a screw knob style

Question 71

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

Answer 71

pull handle

Question 72

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

Answer 72

seven

Question 73

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

Answer 73

counterclockwise

Question 74

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

Answer 74

galvanic

Question 75

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

Answer 75

electrolysis

Question 76

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

Answer 76

increased

Question 77

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

Answer 77

sacrificial

Question 78

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

Answer 78

age or model

Question 79

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

Answer 79

suction side and one is installed on the discharge

Question 80

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

Answer 80

low volume and high-pressure