Chapter 14 (Fire Streams)

Front 1

The visible form of steam is called

Back 1

Condensed steam

Front 2

The total pressure lost during the travel of water through a hoze to the nozzle is.

Back 2

Friction loss

Front 3

What kind of streams discharge more than 350 GPMs?

Back 3

A Master stream

Front 4

Which type of stream is fine and composed of tiny water droplets

Back 4

A fog stream

Front 5

What kind of stream is recommended for class C fires.

Back 5

Fog nozzles with at least 100 PSI

Front 6

What kind of foam is effective against hydrocarbon fuels and polar solvents?

Back 6

Class B foam

Front 7

What form is foam in before it is exposed to water and air?

Back 7

Foam Concentrate

Front 8

What is the common expansion rate for medium expansion foam

Back 8

20:1 to 200:1

Front 9

The __________ method of pumping foam proportions foam into the fire stream at the correct ratio.

Back 9

Injection

Front 10

Which nozzle works best at distributing low expansion foam?

Back 10

Air aspirating foam nozzle

Front 11

What method of foam application is defined as dropping foam directly on-top of a fire/fuel source?

Back 11

Rain down method

Front 12

Water absorbs heat by converting it to steam, this is called. PG 718

Back 12

Vaporization

Front 13

Water freezes at? PG 719

Back 13

32 degrees F

Front 14

water turns to steam at PG 719

Back 14

212 degrees F

Front 15

At 212 degrees water expands

Back 15

1,700 times

Front 16

When the nozzle is below the fire pump, the friction?

Back 16

Decreases

Front 17

When the flow of water through a hose-line is suddenly stopped it causes a?

Back 17

Water hammer

Front 18

A low volume stream provides ______ GPM PG724

Back 18

40

Front 19

A handline stream provides PG724

Back 19

40-350 GPM

Front 20

The average PSI used on a solid bore handline

Back 20

50PSI

Front 21

Before the tip is changed on a nozzle to adjust the flow rate, you must. PG 272

Back 21

turn off the flow.

Front 22

Which fog pattern is the easiest to control?

Back 22

Wide Angle fog pattern

Front 23

What kind of nozzle allows for adjustment of flow rate while pumping?

Back 23

Manual nozzles

Front 24

What factor effects the nozzle reaction during hose usage.

Back 24

The PSI that the water is being pumped at

Front 25

What kind of stream can disrupt thermal layering and push air into a fire?

Back 25

Fog Nozzle

Front 26

What kind of nozzle are used in cellars and confined spaces

Back 26

Broken Stream

Front 27

What is the difference between a strait stream and a solid stream?

Back 27

A solid stream is produced by a smoothbore nozzle, A strait stream is produced by a fog nozzle on the narrowest setting.

Front 28

What is the name of the lever used to open a hose line?

Back 28

Bale

Front 29

What position is a ball valve in, when the nozzle is closed?

Back 29

perpendicular

Front 30

True or False, One should never lubricate a nozzle PG 733

Back 30

False

Front 31

Fire fighting foam fights fire by completing 4 seperate tasks.

Back 31

Seperating, smothering, cooling and penetrating

Front 32

Polar solvents are? PG 735

Back 32

Flammable liquids that mix with water

Front 33

What is needed to produce fire fighting foam PG 735

Back 33

water, air, mechanical agitation

Front 34

True or False, when foam is no longer visible it needs to be re-applied?

Back 34

False even though foam disipates a residual layer is still there.

Front 35

Foam proportioner is?

Back 35

The device that introduces foam concentrate to water

Front 36

Foam solution is

Back 36

Water and foam before introduction to air

Front 37

Foam

Back 37

Foam introduced to air and ready for application

Front 38

Low expansion foam has a ratio of

Back 38

less than 20:1

Front 39

High expansion foam is a ratio of PG736

Back 39

200:1 to 1000:1

Front 40

Class A foam prevents what process when applied to a fuel? PG736

Back 40

Pyrolysis

Front 41

what thickness is a foam blanket most effective at? PG 737

Back 41

4 inches

Front 42

What percent water are most foams supposed to be mixed with PG738

Back 42

94-99 percent water

Front 43

Induction Mixing is performed by

Back 43

passing a stream of water through and eductor

Front 44

Injection System

Back 44

Uses and external pump to force foam into the fire stream

Front 45

Batch Mixing

Back 45

Mixing the foam at the apparatus or portable water tank

Front 46

Premixing is sometimes done by special tanks, after use these tanks must.

Back 46

Be completely flushed before put back into service

Front 47

What kind of nozzle adds air into the foam solution to produce finished foam?

Back 47

Foam generating system nozzle

Front 48

Roll on method of foam application

Back 48

Spraying the foam at ground level from the closest to the furthest point in the fuel, completely coating it.

Front 49

What method describes using a backdrop to cover a fuel from a central location onto the source?

Back 49

Bank Down method

Front 50

During large fires the most effective rain down tactic is to

Back 50

Keep the nozzle and foam in one area where it can pile and distribute.