Chapter 5 Water Supply

Question 1

Pressure good for?

Answer 1

Pressure is use for reach and penetration

Question 2

Water volume is good for?

Answer 2

Amount of water that is applied to the fire that puts it out not pressure

Question 3

Weight of one cubic foot of water

Answer 3

1 cu. ft of water weights 62.5 lbs and this equals 7.5 gallons

Question 4

Physical fact 2 of water

Answer 4

The pressure in a confined body of water at REST is the same at all points

Question 5

Head pressure ( column of water 1 ft high exerts a pressure of xxxxx psi at its base)

Answer 5

For every foot of height 0.434 psi. ( the weight of one cu. ft. Of water is 62.4 lbs, divided by the number of square inches in the base of 1 cu. ft, 144 equals 0.434

Question 6

Water Pressure increases Xxxx psi for every _________ ft of depth.

Answer 6

1 psi. 2.3 ft of depth

Question 7

How much pressure does it take to push a single drop,of water out of the top of an open valve of a standpipe riser located 230ft above the pump?

Answer 7

100 psi

Question 8

The most common resistance to flow in hoses is?

Answer 8

Friction loss, only a fraction of this loss is actually due to the friction between the water and the inside of the hose

Question 9

Turbulence

Answer 9

Turbulence increases as the volume of water increases

Question 10

Laminar flow

Answer 10

At low flows, there is almost no turbulence and all the water molecules move along quite smoothly

Question 11

Friction loss occurs along the length of hose

Answer 11

If the flows remain constant, the longer the the hose, the greater the friction loss

Question 12

Friction loss and diameter of hose

Answer 12

The larger the diameter of hose the less friction loss for the same flow

Question 13

Diameter of hose

Answer 13

By increasing the diameter of hose, more water can be delivered farther using the same pump

Question 14

Increasing water

Answer 14

Increasing the amount of water flowing through a hose will increase the amount of friction loss, regardless of the diameter of the hose.

Question 15

Water rule 4

Answer 15

The pressure in the water main is independent of the shape and volume of the container

Question 16

A pump impeller can do two things:

Answer 16

Give a little bit of water a strong push or it can give you a lot of water a little push