FF1&2 Chapter 16

As water is vaporized into stream, it expands approximately _______ its original volume.

1,700 times

Which statement about water streams is MOST accurate?

A steam broken into small droplets has a greater surface area.

Which of the following statements about cellar nozzles is MOST accurate?

Cellar nozzles are lowered into confined spaces through a hole.

Which type of nozzle can be adjusted, resulting in different patterns?

Fog

Which of the following Statements about fog-streams is Most accurate?

Fog- streams may be used to cool the hot fire gas layer.

Which of the following fire streams is supplied by 1 1/2 to 3 inch hose, and discharged from 40 to 350 gpm

Handline stream

Which of the following statements about water pressure is MOST accurate?

If the nozzle is above the fire pump, nozzle pressure is decreased.

Which of the following BEST describes the rate of discharge of a low-volume stream?

Less than 40 gpm

Which of the following fire stream patterns has the ability to reach areas other streams might not reach?

Solid stream

Which fire stream pattern is produced by a fixed oriface, smooth bore nozzle?

Solid-stream

Which of the following statements about friction loss is MOST accurate?

The longer the hose lay, the greater the friction loss.

Rotary valves control both the water flow and the discharge pattern of a fire stream.

True

which of the following is a factor that may affect a fire stream?

Wind direction and velocity

Characteristics of water that make it valuable for fire extinguishment include:

a greater heat-absorbing capacity than other agents.

The primary way water extinguishes fire by:

absorbing heat

To prevent water hammer:

closed control valve slowly.

A fire stream is a stream of water or extinguishing agent after it:

leaves the fire hose nozzle until it reaches the desired target.

Which type of nozzle can be used to effectively control fires in concealed spaces?

piercing

The type of nozzle control valve that seats a moveable cylinder against a shaped cone to turn off the flow of water is the:

slide valve

The energy required to raise the temperature of a substance by one degree is called:

specific heat

Which of the following fire stream patterns is usually produced by a fog nozzle?

straight stream

When operating a handling, a firefighter should open the control valve slowly:

to better control the nozzle reaction

Fire stream pattern types are defined by the specific pattern or shape of the water after it leaves the nozzle and the size of the:

volume of water flowing from the nozzle per minute (GPM)