ch6 what is water and where does it come from

Question 1

The primary way water extingiushes fire is by, blank or absorbing the heat from the fire

Answer 1

cooling

Question 2

a measure of the heat-absorbing capacity of a substance

Answer 2

specific heat

Question 3

the amount of heat required to raise the temperature of 1 pound of water 1 degree farenheit

Answer 3

btu, british thermal unit

Question 4

The blank, has taken the place of the calorie in the SI heat measurement

Answer 4

joule

Question 5

the quantity of heat absorbed by a substance when it changes from a liquid to a vapor

Answer 5

latent heat of vaporization

Question 6

The temperature at which a liquid absorbs enough heat to change to vapor is know as its blank

Answer 6

boiling point

Question 7

Each pound of water requires approximately blank btu of additional heat to completely convert into steam

Answer 7

970

Question 8

1 gallon of water will absorb blank btu of heat if all the water is converted to steam

Answer 8

9,346

Question 9

At 212 degrees water expands approximately blank times its original volume

Answer 9

1,700

Question 10

the tendency of liquid to possess internal resistance to flow

Answer 10

viscosity

Question 11

the density of liquids in relation to water is known as

Answer 11

specific gravity

Question 12

force per unit area

Answer 12

pressure

Question 13

a simple measure of weight and is usually expressed in pounds

Answer 13

force

Question 14

The weight of 1 cubic foot of water is approximately blank pounds

Answer 14

62.5

Question 15

the speed at which this fluid travels is often referred to as blank

Answer 15

velocity

Question 16

a pressure of 1 psi makes the column of mercury about blank inches tall

Answer 16

2.04

Question 17

Any pressure less than atmospheric pressure is called

Answer 17

vacuum

Question 18

blank in the fire servie refers to the height of a water supply above the discharge orifice

Answer 18

head

Question 19

stored potential energy available to force water through, pipe, fittings, fire hose, and adapters

Answer 19

static pressure

Question 20

at rest or without motion

Answer 20

static

Question 21

that pressure found in a water distribution system during normal consumption demands

Answer 21

normal operating pressure

Question 22

that part of the total available pressure not used to overcome friction loss or gravity while forcing water through pipe, fittings, fire hose, and adapters

Answer 22

residual pressure

Question 23

a remainder or that which is left

Answer 23

residual

Question 24

that forward velocity pressure at a discharge opening while water is flowing

Answer 24

flow pressure

Question 25

blank refers to the center line of the pump or the bottom of a static water supply source above or below ground level

Answer 25

elevation

Question 26

the position of an object above or below sea level

Answer 26

altitude

Question 27

that part of the total pressure lost while forcing water through, pipe, fittings, fire hose, and adapters

Answer 27

friction loss

Question 28

the size of the hose determines the blank for a given volume of water

Answer 28

velocity

Question 29

if the velocity is increased beyond these limits, the friction becomes so great that the entire stream is agitated by resistance

Answer 29

critical velocity

Question 30

high-volume systems should be protected with blank

Answer 30

dump valves

Question 31

a fire hydrant that receives water from only one direction is known as a blank

Answer 31

dead-end hydrant

Question 32

A distribution system that provides circulating feed from several mains constitutes a blank

Answer 32

grid system

Question 33

large pipes, with relatively widespread spacing, that convey large quantities of water to various points of the system for local distribution to the smaller mains

Answer 33

primary feeders

Question 34

network of intermediate sized pipes that reinforce the grid withing the various loops of the primary feeder system and aid the concentration of the required fire flow at any point

Answer 34

secondary feeders

Question 35

Grid arrangement of smaller mains serving individual fire hydrants and blocks of consumers

Answer 35

distributors

Question 36

valves for water systems are broadly divided into blank and blank

Answer 36

indicating and nonindicating

Question 37

The blank is a hollow metal post that is attached to the valve housing

Answer 37

post indicator valve

Question 38

the average of the total amount of water used in a water distribution system over the period of one year

Answer 38

average daily consumption

Question 39

the maximum total amount of water that was used during any 24 hour interval within a 3 year period

Answer 39

maximum daily consumption

Question 40

the maximum amount of water used in any 1 hour interval over the course of a day

Answer 40

peak hourly consumption