Ch. 7: Fire Hose Nozzles and Flow Rates Flashcards Preview

Pumping Apparatus D/O Handbook 2e > Ch. 7: Fire Hose Nozzles and Flow Rates > Flashcards

Flashcards in Ch. 7: Fire Hose Nozzles and Flow Rates Deck (62)
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1

What can be defined as a stream of water or other extinguishing agent after it leaves a nozzle until it reaches the desired point?

a fire stream

2

What three basic types of fire streams does the fire service utilize?

solid, fog, broken

3

What is a fire stream produced from a fixed orifice, smoothbore nozzle?

a solid stream

4

What is designed so that the shape of the water in the nozzle is gradually reduced until it reaches a point a short distance from the outlet?

solid stream nozzles

5

What may be produced by deflection at the periphery or by impinging jets of water or by a combination of these?

a fog stream

6

What is directly dependent on the width of the stream, the size of the water droplets, wind, and the amount of water flowing?

the reach of the fog stream

7

What are designed to flow a specific amount of water at a specific nozzle discharge pressure on all stream patterns?

constant flow nozzles

8

What are designed to be placed on attack lines that can be easily maneuvered by firefighters?

handline nozzles

9

What is the maximum amount of water that can safely flow through a handline nozzle?

350 gpm

10

What is applied to any fire stream that is too large to be controlled without mechanical aid?

master stream

11

What doesn't just deliver large volumes of water but also have a greater reach than handheld streams?

master streams

12

What are the three basic types of monitors?

fixed, portable, and combination

13

What allows the stream direction and angle to be changed while water is being discharged?

a monitor

14

What is mounted on a fire apparatus deck and is connected directly to the pump by permanent piping?

a turret pipe

15

What consists of a short length of large diameter hose with a large nozzle or large playpipe supported at the discharge end by a tripod?

deluge set

16

What are those large-capacity nozzles that are designed to be placed on the end of an aerial device?

elevated master stream

17

What is a master stream device used in conjunction with aerial ladders?

a ladder pipe

18

What is known as the counterforce as water is discharged from a nozzle at a given pressure, a force pushes back on the firefighters handling the hoseline?

nozzle reaction

19

The fire stream produced from a fixed orifice, smoothbore nozzle is known as a -

Solid stream

20

What determines the flow from a solid stream nozzle?

- Nozzle pressure
- Size of the discharge opening

21

When solid streams are used as handlines they should be operated at which a the following nozzle pressures?

50 psi.

22

When solid streams are used as master streams they should be operated at which a the following nozzle pressures?

80 psi.

23

To strike or dash about or against, clashing with the sharp collision, or to come together with force; best describes which of the following?

Impinge.

24

The line bounding a rounded surface or the outward boundary of an object distinguish from its internal regions best describes which a the following?

Periphery.

25

A turning or state of being turned, a turning from a straight line or given course, or a bending or a deviation best describes which of the following?

Deflection.

26

A fog stream nozzle that drives several jets of water together at a set angle to break the water up into finely divided particles is called a -

Impinging stream.

27

__ are produced by deflecting water from the periphery to an inside circular stem in a periphery-deflected fog nozzle.

Periphery-deflected streams

28

The reach of any fog stream is directly dependent on which of the following?

- The width of the stream.
- The size of the water droplets and the wind.
- The volume of water flowing.

29

Nozzles that are designed to flow a specific amount of water at a specific nozzle discharge pressure on all stream patterns are called -

Constant flow nozzles.

30

Most constant flow nozzles are intended to be operated at a nozzle pressure of -

100 psi.