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