5. Principle Of Water

Question 1

Water freezing point and boiling point

Answer 1

32°F

212°F

Question 2

$$$

Water weight:

Answer 2

8. 3 lb/gal

62. 4 lb/ft3

Question 3

$$$

At ___°F, water converted to steam occupies approximately ___ times its original volume, helping to dissipate heat in the well vented room

Answer 3

212 Fahrenheit

1700 times

Question 4

Atmospheric pressure at sea level is ___ psi

Answer 4

14.7 psi

Question 5

Head pressure

Answer 5

For every 1 foot increase in elevation .434 psi is gained

Question 6

$$$

__ pressure Is the portion of total available pressure not used to overcome friction loss or gravity while forcing water though pipes, fittings, hoses, or adapters.

Answer 6

Residual pressure

Question 7

$$$

Above sea level atmospheric pressure decreases approximately __psi for every 1000 feet

Answer 7

0.5 psi

Question 8

$$$

The friction lost in older hoes may be as much as __% greater than that of new hose.

Answer 8

50%

Question 9

$$$

The rougher the inner surface of the pipe the greater the friction loss will be

Answer 9

Coefficient of friction

Question 10

Agitation causes a degree of turbulence known as __

Answer 10

Critical velocity

Question 11

A fire hydrant that receives water from only One direction is known as a ___ hydrant

Answer 11

Dead end

Question 12

When a fire hydrant receives water from two or more directions it is said to have

Answer 12

Circulating feed or a looped feed