IFSTA CHAPTER 14 FIRE STREAMS Flashcards Preview

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Flashcards in IFSTA CHAPTER 14 FIRE STREAMS Deck (21)
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1
Q

How many times does water expand when converted to steam?

A

1700 times

2
Q

What three sizes are fire streams classified into?

A

Low-volume, handline and master streams

3
Q

What size hose and GPM classify a handline?

A

1 ½” - 3” hose and 40 – 350 GPM

4
Q

What are the three types of fire streams?

A

Solid, fog and broken

5
Q

Which type of nozzle allows the operator to vary the GPM while maintaining a constant nozzle pressure?

A

Automatic Nozzle

6
Q

What is another name for a fog Nozzle?

A

Combination nozzle

7
Q

What is the designed operating pressure for most combination nozzles?

A

100 psi

8
Q

What class of fire is a broken stream nozzle least effective?

A

Class C electrical

9
Q

Where is the most effective place to use a broken stream nozzle?

A

Confined space

10
Q

What is the most common type of nozzle control valve?

A

Ball valve

11
Q

What 4 ways can firefighting Foam aide in firefighting?

A

Separating, cooling, smothering, penetrating (class A)

12
Q

What is the ratio of expansion commonly accepted for medium-expansion foam?

A

20:1 – 200:1

13
Q

How thick should the foam blanket be on unignited class B spills?

A

4”

14
Q

What percent water is most firefighting foams intended to be mixed?

A

94% - 99.9% water

15
Q

Which is the easiest method of foam proportioning?

A

Batch mixing

16
Q

Which type of foam proportioning is commonly used with portable and wheeled fire extinguishers.?

A

Premixing

17
Q

Which is the most common type of foam proportioner?

A

In-line foam educator

18
Q

What type of nozzle is most effective at creating low expansion foam?

A

Air-aspirating foam nozzle

19
Q

What type of nozzle can be use to create a short lasting low expansion foam when used with AFFF and class a foams?

A

Fog Nozzle

20
Q

What type of nozzle is typically used to deliver medium-expansion firefighting foam?

A

Water-aspirating nozzle

21
Q

What type of foam is a mechanical blower used produce?

A

High-expansion foam