Chapter 14 - Foam Equipment and Systems Flashcards Preview

IFSTA Pumping and Aerial Apparatus Driver/Operator Handbook - 3rd Edition > Chapter 14 - Foam Equipment and Systems > Flashcards

Flashcards in Chapter 14 - Foam Equipment and Systems Deck (61)
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1

Some of the major reasons for the increase in use of foam products include: (4)

> Magnitude and frequency of hazardous materials incidents that require foam operations for mitigation.
> Newer foam concentrates are more easily used by structural and wildland firefighters.
> Improvements in the design of foam proportioning equipment and systems have made their inclusion in apparatus more feasible.
> Use of foam may help reduce water usage; a significant factor where supply is limited.

2

_________ ____ are the most common foams in use.

Mechanical Foams

3

These products must be ____________ (mixed with water) and ________ (mixed with air) before use

Proportioned
Aerated

4

To produce fire fighting foam, ____ _______, _____, and ___ must be ________ or injected in the correct ratios.

Foam Concentrate
Water
Air
Educted

5

Raw foam liquid in its storage container before being combined with water and air.

Foam Concentrate

6

Device that injects the correct amount of foam concentrate into the water stream to make the doam solution.

Foam Proportioner

7

Mixture of foam concentrate and water before the introduction of air.

Foam Solution

8

Completed product after air is introduced into the foam solution. (Also known as Finish Foam)

Foam

9

Class B fuels are divided into two categories:

Hydrocarbons and Polar Solvents

10

__________ ____, such as crude oil, fuel oil, gasoline, benzene, and kerosene, are petroleum based and have a specific gravity of less than one and will float on water.

Hydrocarbon Fuels

11

______ _______ _____, such as alcohol, acetone, ketones, and esters, are known as miscible liquids because they mix with water.

Polar Solvent Fuels

12

_______ foams are designed solely for use on hydrocarbon fuels and are not effective on polar solvent products regardless of the concentration that is applied.

Class B Foams

13

Foam extinguishes and/or suppresses vapors by the following methods:

> Separating - Creates a barrier between the fuel and the fire.
> Cooling - Lowers the temperature of the fuel and adjacent surfaces.
> Suppressing or smothering - Prevents the release of flammable vapors, reducing the possibility of ignition or reignition.

14

____________ is the act of mixing of water with foam concentrate to form a foam solution.

Proportioning

15

Most fire fighting foam concentrates are formulated to mix with a___ to _____ percent water.

94 to 99.9%

16

Class A foam percentages may range from as little as ____ percent to __ percent.

0.1 to 1 %

17

Foam is proportioned by using one of four basic methods:

> Induction
> Injection
> Batch Mixing
> Premixing

18

Four common methods of foam storage for most fire service applications are:

> Pails
> Barrels
> Totes
> Apparatus Tanks

19

Five-gallon plastic _____ are commonly used containers in many municipal fire departments.

Pails

20

Foam concentrate is also available in 55- gallon plastic or plastic-lined _______.

Barrels

21

When bulk storage of foam concentrates is required, some fire departments or industrial facilities may specify 275-gallon containers, called _______.

Totes

22

Foam concentrate tanks on municipal fire apparatus generally range from ___ to ____ gallons while foam pumpers or tenders may carry _____ gallons or more of concentrate.

20 to 200
8,000

23

The majority of foam concentrates are divided for use on either ______ __ (ordinary combustibles) or _____ __ (Flammable liquids) fuels.

Class A or Class B

24

_______ ___ foam may be used with fog nozzles, aerating foam nozzles, and medium and high expansion devices; and compressed air foam systems using most nozzles, including solid stream nozzles.

Class A foam

25

______ __ foam concentrates my be mixed with percentages as little as ___ to ____ percent.

0.1 to 1.0 %

26

The following guidelines are commonly used for proportioning Class A Foam:

> Fire attack and overhaul with standard fog nozzles - 0.2 to 0.5%
> Exposure protection with standard fog nozzles - 0.5 to 1.0%
> Any application with air aspirating foam nozzles - 0.3 - 0.7%
> Any application with CAFS - 0.2 to 0.5%

27

The __________ ____ refers to the minimum amount of foam solution that must be applied to a fire, per minute, per square foot of fire.

Application Rate

28

These foam concentrates (______ __) consist of a sythetic or protein base. While synthetic foam is made from a mixture of flourosurfactants, protein based foam is derived from animal protein

Class B

29

Class B foams are mixed in proportions from ____ to ____ percent

1 to 6%

30

The method used to aerate foam solution will create a varying degree of expansion based on the following:

> Type of foam concentrate used
> Accurate proportioning of the foam concentrate in the solution
> Quality of the foam concentrate
> Method of Aeration