IFSTA CHAPTER 14 FIRE STREAMS

Question 1

How many times does water expand when converted to steam?

Answer 1

1700 times

Question 2

What three sizes are fire streams classified into?

Answer 2

Low-volume, handline and master streams

Question 3

What size hose and GPM classify a handline?

Answer 3

1 ½” - 3” hose and 40 – 350 GPM

Question 4

What are the three types of fire streams?

Answer 4

Solid, fog and broken

Question 5

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

Answer 5

Automatic Nozzle

Question 6

What is another name for a fog Nozzle?

Answer 6

Combination nozzle

Question 7

What is the designed operating pressure for most combination nozzles?

Answer 7

100 psi

Question 8

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

Answer 8

Class C electrical

Question 9

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

Answer 9

Confined space

Question 10

What is the most common type of nozzle control valve?

Answer 10

Ball valve

Question 11

What 4 ways can firefighting Foam aide in firefighting?

Answer 11

Separating, cooling, smothering, penetrating (class A)

Question 12

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

Answer 12

20:1 – 200:1

Question 13

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

Answer 13

4”

Question 14

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

Answer 14

94% - 99.9% water

Question 15

Which is the easiest method of foam proportioning?

Answer 15

Batch mixing

Question 16

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

Answer 16

Premixing

Question 17

Which is the most common type of foam proportioner?

Answer 17

In-line foam educator

Question 18

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

Answer 18

Air-aspirating foam nozzle

Question 19

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

Answer 19

Fog Nozzle

Question 20

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

Answer 20

Water-aspirating nozzle

Question 21

What type of foam is a mechanical blower used produce?

Answer 21

High-expansion foam