Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CFD Pump Operator > Hose Nozzles And Flow Rates > Flashcards

Hose Nozzles And Flow Rates Flashcards

1
Q

What are the main types of fire streams available?

A

Solid stream
Fog stream
Broken stream

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

When would special purpose nozzles be used?

A

To operate effectively in unusual locations, or on specific fuels.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Why is it important to take into account nozzles pressure and reaction?

A

Excessive nozzles pressure may produce a reaction that may seriously injure firefighters and hamper fire suppression efforts.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Which type of nozzle produces a tight stream with little spray or shower effect?

A

Solid stream nozzle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The flow and reach of a solid stream nozzle is determined by the size of the discharge orifice and the…

A

nozzle pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Solid stream nozzles on handlines should generally be operated at a maximum pressure of…

A

350 kpa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

At what maximum pressure should solid stream master stream appliances be operated?

A

550 kpa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Periphery deflected streams are produced by deflecting water around…

A

an inside circular stem in the nozzle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What type of fog stream breaks water into fine, evenly divided particles by driving several jets of water together at an angle?

A

Impinging stream
(also a fog nozzle)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Impinging stream nozzles most often provide a…

A

wide angle fog pattern

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The reach of a fog stream is directly related to…

A

the wind

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The type of nozzle that is designed to flow a specific volume of water on all stream patterns at a specific nozzle discharge pressure is called…

A

Constant flow fog nozzle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The type of nozzle that allows the firefighter operating the handline to select the flow rate to suit fire and operating conditions is called the…

A

selectable gallonage nozzle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

When properly supplied, both a selectable gallonage nozzle and a _______ will discharge predetermined gallonage.

A

constant flow nozzle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

A type of variable nozzle with the ability to change patterns while maintaining the same nozzle pressure is called the…

A

automatic fog nozzle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

If the gallonage supplied to an automatic fog nozzle changes, the automatic nozzle….

A

adjusts to maintain virtually the same pressure

17
Q

Which type of nozzle produces a stream with significant forward velocity and relatively low volume of water delivery?

A

High pressure fog nozzles

18
Q

Which of the following would high pressure fog nozzles be BEST suited for?
Vehicle fire
Wildland fire
Multiple occupancy fire
Industrial occupancy fire

A

Wildland fires

19
Q

Why is 1400 lpm generally the maximum flow for a handline?

A

Greater flows will produce a nozzle reaction that is difficult or dangerous for firefighters to handle.

20
Q

What can be said about master stream nozzles…

A

They generate considerable nozzle reaction due to their high flow rate.

21
Q

An incident where master streams are most likely to be used is…

A

when personnel are limited

22
Q

What is an advantage of master streams?

A

They offer the ability to operate at a greater distance from the fire

23
Q

Each type of master stream monitor has the ability to change the stream direction or angle…

A

while water is being discharged

24
Q

Which type of master stream appliance has flow limitations when removed from the apparatus and placed on the ground?

A

Combination monitor

25
Q

Elevated master streams that have pre-piped waterways generally feature a master stream that may be controlled remotely from the apparatus turntable and is generally able to…

A

move both up and down and side to side

26
Q

Special purpose nozzles that may be referred to as distributors are called…

A

cellar nozzles

27
Q

Special purpose nozzles that are often lowered through holes or other openings to the cellar of an occupancy are called…

A

cellar nozzles

28
Q

Special purpose nozzles that are commonly used in aircraft firefighting, car fires, or to apply water to voids, attics, or other areas inaccessible to standard fire streams are called…

A

piercing nozzles

29
Q

Special purpose nozzles that have a hardened steel point capable go being driven through a variety of material such as concrete blocks are called…

A

piercing nozzles

30
Q

Special purpose nozzles that consist of a solid piece of brass or steel with many small impinging holes that produce a very fine mist are called…

A

chimney nozzles

CFD Pump Operator (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions