ch 14 test quiz

Question 1

A Pitot gauge is used to calculate:

Answer 1

volume of flowing water

Question 2

The pipes that deliver water from the treatment facility for distribution are:

Answer 2

mains

Question 3

What is the minimum recommended pressure for water coming from a fire hydrant?

Answer 3

20 psi (138 kPa)

Question 4

The pipes that deliver water to users and hydrants on individual streets are:

Answer 4

distributors.

Question 5

Which pipe pattern supplies water to hydrants from more than one direction?

Answer 5

Grid

Question 6

Where are dry-barrel hydrants typically located?

Answer 6

Cold climates

Question 7

Which is the term for the large discharge opening on a fire hydrant?

Answer 7

Steamer

Question 8

How can you determine that a dry-barrel hydrant is still draining?

Answer 8

Place a hand over an outlet and feel for suction

Question 9

The NFPA recommends color-coding hydrants to indicate:

Answer 9

available flow.

Question 10

Fire hydrants should be inspected at least once every _____ months.

Answer 10

12

Question 11

An object in motion possesses which kind of energy as a result of that motion?

Answer 11

Kinetic

Question 12

When water is motionless, which kind of energy does it have?

Answer 12

Potential

Question 13

Pressure in a water distribution system during average consumption is __________ pressure.

Answer 13

normal operating

Question 14

What is the realistic minimum usable residual pressure from a water distribution system for firefighting operations?

Answer 14

20 psi (138 kPa)

Question 15

How close must a fire engine get to a static water source to be able to draft directly from it through hard suction hose?

Answer 15

20 ft (6 m)

Question 16

A dry hydrant provides access to a:

Answer 16

static water source.

Question 17

In general, mobile water supply apparatus (tankers) carry __________ of water.

Answer 17

1000 to 3500 gal (3785 to 13,249 L)

Question 18

What is the maximum capacity of typical portable water tanks?

Answer 18

5000 gal (18,927 L)

Question 19

How many gallons per minute can a tanker shuttle operation deliver without interruption?

Answer 19

Several hundred

Question 20

Fire fighters may need to hold on to the ________ while filling a self-expanding portable tank.

Answer 20

collar

Question 21

Portable pumps can deliver a maximum of:

Answer 21

500 gpm (1893 lpm).

Question 22

Which is the fastest way for a mobile water supply apparatus to offload water into a portable tank?

Answer 22

Use the dump valve

Question 23

Which pressure measurement provides the best indicator of how much more water is available in the system?

Answer 23

Residual

Question 24

In a well-designed water distribution system, which type of pattern do the water mains follow?

Answer 24

Grid

Question 25

Which is a common size of hydrant outlet?

Answer 25

2½" (65 mm)

Question 26

Which is the term for the middle-size water main in a municipal water distribution system?

Answer 26

Secondary feeder

Question 27

Which is the NFPA color code for a hydrant flowing less than 500 gpm (1893 lpm)?

Answer 27

Red

Question 28

Which is the NFPA color code for a hydrant flowing 500 to 999 gpm (1893 to 3781 lpm)?

Answer 28

Orange

Question 29

Which is the NFPA color code for a hydrant flowing 1000 to 1499 gpm (3785 to 5674 lpm)?

Answer 29

Green

Question 30

Which is the NFPA color code for a hydrant flowing 1500 gpm (5678 lpm) or more?

Answer 30

Light blue

Question 31

According to the NFPA, what is the minimum distance between the center of a fire hydrant outlet and the finished grade of the ground around the hydrant?

Answer 31

18" (45 cm)

Question 32

The flow or quantity of water moving is usually measured in:

Answer 32

gallons per minute (liters per minute).

Question 33

The pressure in a system when no water is flowing is called ________ pressure.

Answer 33

static

Question 34

Another term for head pressure is __________ pressure.

Answer 34

elevation

Question 35

Which pressure must be measured to calculate the quantity of water flowing through a hydrant discharge?

Answer 35

Residual

Question 36

The pressure remaining in a water distribution system when water is flowing is the ________ pressure.

Answer 36

residual

Question 37

What should be done to avoid water hammer?

Answer 37

Open and close all valves slowly

Question 38

What is the decrease in pressure that occurs as water moves through a hose?

Answer 38

Friction loss

Question 39

What is hard suction hose most commonly used for?

Answer 39

Drafting from a static water source

Question 40

Where is the main valve located in a dry-barrel hydrant?

Answer 40

Below the frost line

Question 41

Which is one of the four factors that determine friction loss?

Answer 41

Hose diameter

Question 42

The quantity of water that is being moved through a pipe or hose is termed the:

Answer 42

flow

Question 43

Which term means the properties of energy, pressure, and water flow as related to fire suppression?

Answer 43

Hydraulics

Question 44

Which term means the amount of energy in water?

Answer 44

Pressure

Question 45

On a wet-barrel hydrant, where is the valve located?

Answer 45

On each outlet

Question 46

Friction loss is __________ proportional to the length of a hose.

Answer 46

directly

Question 47

In areas of the western US where aircraft are used to fight wildland fires, which term is used for automotive water supply apparatus?

Answer 47

Tender

Question 48

A jet siphon is used for which application?

Answer 48

Transferring water between portable tanks

Question 49

Where is a dump valve located?

Answer 49

On a mobile water supply apparatus

Question 50

Which type of pressure is created by the difference in height between a water source and the point of discharge?

Answer 50

Elevation