Chapter # 12 Static Water Supply Sources

Question 1

The height of the fire pump above the surface of the water.

Answer 1

Lift

Question 2

What is the height of possible lift affected by?

Answer 2

Atmospheric pressure and the amount of vacuum the primer can produce.

Question 3

What height could a fir pump lift water at sea level in a theoretical scenario?

Answer 3

33.8’

Question 4

The maximum height to which any amount of water may be raised through a hard intake hose to the pump.

Answer 4

Maximum lift

Question 5

What is the maximum lift for most fire pumps, in most circumstances?

Answer 5

25’

Question 6

What is the equation to determine the max lift that a pumper will accomplish?

Answer 6

L=1.13 Hg Multiply 1.13 by the inches of mercury reading on the intake gauge. This will give you the max possible lift in feet.

Question 7

The height of a column of water may be lifted in sufficient quantity to provide a reliable fire flow.

Answer 7

Dependable lift

Question 8

When taking in to consideration atmospheric pressure and friction loss, every fire pump in good repair should have a dependable lift of what?

Answer 8

14.7’

Question 9

All fire pumps are rated when drafting from 10’ of lift with how much hard inake hose?

Answer 9

20’

Question 10

What capacity if pump able to deliver when lifting 15’? How about 20’?

Answer 10

15' = 70% of rated capacity
20' = 60% of rated capacity

Question 11

Takes into account all factors that contribute to the amount of work that the pump must do to provide a fire stream.

Answer 11

Net Pump Discharge Pressure

Question 12

What is the equation for NPDP when drafting?

Answer 12

PDP + Intake pressure correction

Question 13

Intake pressure correction equation.

Answer 13

Pressure correction = lift + total intake hose FL / 2.3

Question 14

What are the two static water supply sources firefighters can draw from?

Answer 14

Natural and man made.

Question 15

What two factors should be considered when determining a natural water drafting site?

Answer 15

Adequacy and Accessibilty

Question 16

What is the equation for determining the adequacy of a small stream?

Answer 16

Q=AxVx7.5 Q= flow. A= sqauare feet (width x depth). V=Velocity in ft/min

Question 17

What is the rule of thumb for evaluating a small pond or lake for adequacy?

Answer 17

Evey 1’ of depth for an area of 1 acre = 1,000 gpm for 5 hours.

Question 18

Name some potential water source accessibility factors.

Answer 18

Can reach water with pumper. Wet or soft ground. Inadequate depth. Silt or debris. Freezing weather. Swift water.

Question 19

What should be done when pumpers are can not reach the water supply source but it is the only source available?

Answer 19

Use portable pumps to pump water from the source to the pumper.

Question 20

Name two common cause for ground thawing around a apparatus.

Answer 20

Apparatus exhaust heat. Warm water from the pump spilling onto the ground.

Question 21

If a apparatus is in a effective position and drafting operations have started, then sinking start to occur, what should be done?

Answer 21

Remain there until the operation is complete.

Question 22

What can be used to build a damn to increase the water depth to help drafting from a stream?

Answer 22

A ladder and salvage cover.

Question 23

What can be placed in the water to provide a drafting spot when it freezes?

Answer 23

Barrels. plastic garbage cans. wooden plugs.

Question 24

What tools may be used to cut a hole though ice to gain access for drafting?

Answer 24

Axe, chain saw, power auger.

Question 25

List some common man made water supply sources.

Answer 25

Cisterns. Private water storage tanks. Ground reservoirs. Swimming pools. Agricultural irrigation systems.

Question 26

Underground water storage receptacles that are usually found in areas that are not serviced by a hydrant system. Typically receive their water from wells or rainwater runoff.

Answer 26

Cisterns

Question 27

What sizes do cisterns typically come in?

Answer 27

10,000 to 100,000 gallons.

Question 28

What are two ways to access the cistern water?

Answer 28

Removable man hole cover or a dry hydrant.

Question 29

Where are private water storage tanks commonly found?

Answer 29

Large residential, industrial, and agricultural properties.

Question 30

Technically a elevated water tank is not a what?

Answer 30

Static water source.

Question 31

Man made impoundments that have some characteristics of a pond or small lake. Most often found on commercial or industrial properties and at water treatment facilities. Contain many millions of gallons of water.

Answer 31

Ground reservoirs.

Question 32

Do some communities require swimming pool owners to allow access to fire firefighters to draft from the swimming pool?

Answer 32

Yes

Question 33

What is a unique problem with drafting from swimming pools.

Answer 33

They are often fenced in.

Question 34

Most pools contain enough water to extinguish a fire where?

Answer 34

In a single family home.

Question 35

What is the equation for capacity of a square/rectangular pool?

Answer 35

Capacity in gallons = L x W x D x 7.5

Question 36

What is the equation for capacity of a circular pool?

Answer 36

Capacity in gallons = pie x r squared x D x 7.5 | Pie = 3.14 r = radius or 1/2 diameter in feet.

Question 37

How is irrigation water generally transported?

Answer 37

open canals or portable pipes (more common)

Question 38

What may be needed to access water from a portable pipe agricultural water system?

Answer 38

Special adapters and tools.