Pump Ops Chpt 11

Question 1

_____ is the difference in elevation between the surface of the static water supply and the center of the pump intake.

Answer 1

Lift

Question 2

The maximum height of the _____ is affected by the angle of the intake hose, but the amount of negative pressure that the priming device can produce, and the existing atmospheric pressure.

Answer 2

Lift

Question 3

For every 1000 feet of altitude, the atmospheric pressure decreases by approximately

Answer 3

0.5 psi

Question 4

Can be calculated by determining the actual atmospheric pressure of an area and multiplying that number by the water’s pressure per square foot while it is in the intake hose.

Answer 4

Theoretical lift

Question 5

A _____ is not attainable using a fire department pumper, meaning that pumpers cannot be expected to draft water that is located 33.9 below the level of the pump.

Answer 5

Total vacuum

Question 6

In the fire service, ______ is defined as the greatest height to which any amount of water may be raised through an intake hose to the pump.

Answer 6

Maximum lift

Question 7

In most circumstances, maximum lift is approximately _____.

Answer 7

25 feet

Question 8

Determining Maximum lift

L=1.13 Hg

Answer 8

L height of lift

1.13 a constant

Hg inches in Mercury

Question 9

Generally, you will be more concerned with the the concept of _____ the height a column of water may be lifted in sufficient quantity to provide a reliable fire flow.

Answer 9

Dependable lift

Question 10

All fire department pumping apparatus are rated when drafting with a minimum lift of ____ from the center of a pump intake to the surface of water through 20 feet of hard intake hose.

Answer 10

3 feet

Question 11

A strainer is submerged at least 2 feet in a water depth of at least 4 feet. As the lift or friction loss in hard intake hose is increased, the water supply capability of the pump decreases. The pump may only deliver about __ of its rated capacity if the lift is increased by 5 feet, to a 15 foot lift, and ___ at a 20 foot lift.

Answer 11

70 percent

60 percent

Question 12

Many communities feature public boat launches that provide excellent ________. In some jurisdictions, fire departments oversee construction of gravel drives and dry hydrants wot create adequate water supply availability.

Answer 12

Drafting access

Question 13

When drafting from a natural water supply source, it is especially important that all intake hoses have a ______ attached and supported so that it does not rest on or near the bottom of the supply source. A ladder may be used to achieve this position.

Answer 13

Strainer

Question 14

If an adequate draft cannot be established due to clogging at the strainer, _____ with tank water may help to dislodge the debris

Answer 14

Back flushing

Question 15

In order to help avoid problems with silt and debris, jurisdictions may install _______ at favorable drafting locations.

Answer 15

Dry hydrants s

Question 16

Most fire departments use a chain saw, _____, axe, or a combination of tools to breach the ice.

Answer 16

Power auger

Question 17

A _____ is an underground water storage receptacle that is usually found in area not serviced by a hydrant system.

Answer 17

Cisterns

Question 18

Although they vary in size, _______typically range from 10,000 to 100,000 gallons.

Answer 18

Cisterns

Question 19

Are artificial installations that have similar characteristics as a pond or lake. They may be found on large commercial or industrial properties as well as municipal water treatment facilities.

Answer 19

Ground reservoirs

Question 20

Formula: square rectangular pool capacity

Answer 20

C = 7.5xLxWxD

Question 21

Formula for round pools

Answer 21

C = 7.5 x 3.14x r2x D

Question 22

In some jurisdictions may flow in excess of 1000 gpm mad may function as a potential water source for fire protection.

Answer 22

Agricultural irrigation systems

Question 23

When evaluating a potential water supply source, first determine its

Answer 23

Adequacy and accessibility

Question 24

A major factor in determining the usability of a static water source is the ability of fire apparatus to _______ an effective drafting operation at the site

Answer 24

Access and set up

Question 25

Floating pumps placed in an adequate water source can develop and maintain a flow of up to

Answer 25

500 gpm

Question 26

Some jurisdictions employ a _____ that allows the utilization of static water supplies that are located a modest distance from a fire apparatus

Answer 26

Water eductor

Question 27

Although lesser depths may be suitable, 2 feet of water all around the ______ is generally considered the minimum for that type of equipment

Answer 27

Barrel type strainer

Question 28

May be used for water as shallow as 1 foot

Answer 28

Floating strainers

Question 29

Are most commonly used to draft from portable tanks

Answer 29

Low level strainers

Question 30

These devices may draw water as shallow as 1 to 2 inches, but generally will not provide the flow required to reach the capacity of the pumping apparatus

Answer 30

Low level strainers

Question 31

These reservoirs typically contain many millions of gallons of water.

Answer 31

Ground reservoir

Question 32

Generally supply water via open canals and portable pipes

Answer 32

Irrigation systems