Firefighter 2 Ch. 14 Fire Streams - Foam

Front 1

4 Ways foam extinguishes fire?

Back 1

Seperating

Cooling

Smothering

Penetrating

Front 2

Class A foams are intended to be used on what?

Back 2

Flammable solids

Front 3

Class B foams are intended to be used on what?

Back 3

Flammable liquids

Front 4

Two types of flammable liquids that class B foam is used on?

Back 4

Hydrocarbons (does NOT mix with water)

Polar solvents (mixes with water)

Front 5

Hydrocarbon Fuel examples?

Back 5

Crude oil, fuel oil, gasoline, benzene, naphtha, jet fuel, kerosene, are petroleum based combustible or flammable liquids that float on water.

Front 6

Polar Solvents examples?

Back 6

Alcohols, acetone, lacquer thinner, ketones, esters, and acids, are flammable liquids that mix readily with water.

Front 7

Foam Concentration

Back 7

Raw Foam liquid before the introduction of water and air.

Front 8

Foam Proportioner

Back 8

Device that introduces foam concentrate into the water stream to make foam solution.

Front 9

Foam Solution

Back 9

Mixture of foam concentrate and water before the introduction of air

Front 10

Foam (finished foam)

Back 10

Completed product after air is introduced into the foam solution.

Front 11

4 Stages of Foam creation?

Back 11

Foam Concentration
Foam Proportioner
Foam Solution
Foam

Front 12

Foams today are of the MECHANICAL type and must be _____ and ______ before use?

Back 12

proportioned and aerated

Front 13

Depending on its purpose, foam can be described by three types:

Back 13

Low-expansion

Medium-expansion

High-expansion

Front 14

What NFPA standard is used for foam expansion?

Back 14

NFPA 11

Front 15

What is the Air/Solution ratio for low-expansion foam?

Back 15

20:1

*20 parts finished foam for
every part of foam solution.

Front 16

What is the Air/Solution ration for medium-expansion foam?

Back 16

20:1 to 200:1

*through hydraulically operated nozzle types.

Front 17

What is the Air/Solution ration for high-expansion foam?

Back 17

200:1 to 1,000:1

Front 18

Which class of foam is being used more increasingly on wildland and structural fires?

Back 18

Class A

Front 19

Which Class of foam can be used with Fog Nozzles, Aspirating Foam Nozzles, medium and high expansion devices and compressed air foam systems (CAFS)?

Back 19

Class A

Front 20

Which foam is mildly corrosive, needing equipment to be flushed thouroly afterwards?

Back 20

Class A

Front 21

Which Class of foam is manufactured from either a synthetic or protein based substance?

Back 21

Class B

Front 22

How thick should a blanket of foam be to be most effective?

Back 22

4 Inches

Front 23

Most fire fighting concentrates are intended to be mixed at which percentage of water?

Back 23

94 to 99.9 percent

Front 24

Which Class of Foam is an exception to changing the percentage of water to control fire?

Back 24

Class A

Front 25

Class B Foams are mixed in proportions from what percentage range?

Back 25

1% to 6%

Front 26

What percentages are used on Class B foams that can be used on both Hydrocarbons and Polar Solvents?

Back 26

3% for Hydrocarbons

6% for Polar Solvents

Front 27

4 Methods by which foam may be proportioned?

Back 27

Induction

Injection

Batch-mixing

Premixing

Front 28

Two types of Foam proportioners for Induction?

Back 28

In-line eductors

Foam nozzle eductors

Front 29

Type of Foam system commonly employed in apparatus-mounted or fixed fire protection system applications?

Back 29

Injection

Front 30

Simplest and most accurate method of mixing foam concentrate?

Back 30

Batch Mixing

Front 31

Type of foam creation that isnt effective on large inncidents?

Back 31

Batch Mixing

Front 32

One of the more commonly used methods of proportioning?

Back 32

Premixing

Front 33

Premix method is used with what 4 applications?

Back 33

Portable extinguishers

Wheeled extinguishers

Skid-mounted twin agents units

vehicle-mounted tank systems

Front 34

Premix systems can be used how many times?

Back 34

one time

Front 35

What is the most common foam proportioners in used today?

Back 35

In-line Foam Eductors

Front 36

What are two types of portable proportioners?

Back 36

In-line foam eductors

Foam Nozzle Eductors

Front 37

Which type of nozzle is used with compressed air foam systems (CAFS)?

Back 37

Solid-bore nozzles

Front 38

Fog Nozzles are used best with what type of foam and which class?

Back 38

AFFF Foam
&
Class A

Front 39

Air-aspirating foam must be used with which type of foam?

Back 39

Protien and fluoroprotein concentrates

*Probide maximum expansion of the agent.

Front 40

Two types of medium and high expansion foam nozzles?

Back 40

Water-aspirating Nozzle

Mechanical Blower

Front 41

Three ways to apply foam to a liquid fire or spill?

Back 41

Roll on method

Bank-down Method

Rain Down method