Chp 4 principles of water

Question 1

For fire protection purposes , ordinary fresh water is considered to weigh ____.

Answer 1

62.4lb/ft3 or 8.3 lbs per gallon

Question 2

Water Density, or its weight per unit of volume, is measurable in

Answer 2

Pounds per cubic foot
(lb/ft3

Question 3

Water occupies approximately 1700 times it original volume when converting to _____at 212F helping to dissipate heat in a well vented room.

Answer 3

212

Question 4

In this manual pressure is defined as

Answer 4

force per unit area

Question 5

______ is a simple measure of weight and is expressed in a pounds or newtons pg 162

Answer 5

force

Question 6

The pressure upon that fluid , as well as the size of the orifice through which it is flowing, determines _______ pg 165

Answer 6

Velocity

Question 7

In the fire service ______ refers to the height of a water supply above the discharge orifice.

Answer 7

Head

Question 8

To convert head height measurements to head pressure in the American system of measurement, use the following formula:

Answer 8

(0.434 x height) = psi

Question 9

While Water is flowing from a discharge opening the forward velocity presser is considered

Answer 9

flow pressure

Question 10

The point beyond where increased velocity starts to decrease volume due to turbulence is the

Answer 10

Critical Velocity

Question 11

Control valves in public water distribution systems are generally______

Answer 11

Gate valves