Chapter 14 - Foam Equipment and Systems Flashcards Preview

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

Flashcards in Chapter 14 - Foam Equipment and Systems Deck (128)
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1

____________ foams are the most common foams in use. These products must be ___________ (mixed with water) and _______ (mixed with air) before use.

Mechanical / proportioned / aerated

p 480

2

- Foam produced by a physical agitation of a mixture of foam concentrates, water, and air.

Mechanical Foam

p 480

3

- Mixing of water with an appropriate amount of foam concentrate in order to form a foam solution.

Proportioning

p 480

4

- Introduction of air into a foam solution to create bubbles that result in finished foam.

Aeration

p 480

5

To produce fire fighting foam, foam concentrate, water, and air must be _________ or injected in the correct ratios.

educted

p 480

6

- Process used to mix foam concentrate with water in a nozzle or proportioner; concentrate is drawn into the water stream by the Venturi method.

Eduction

p 480

7

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

Foam concentrate

p 480

8

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

Foam proportioner

p 480

9

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

Foam solution

p 480

10

- Completed product after air is introduced into the foam solution.

Foam

Also known as finished foam

p 480

11

Class B fuels are divided into two categories; _______________ and ________ __________.

hydrocarbons and polar solvents

p 480

12

Fuels such as crude oil, fuel oil, gasoline, benzene, and kerosene are what type of class B fuels?

Hydrocarbons

p 480

13

Hydrocarbon fuels such as crude oil, fuel oil, gasoline, benzene, and kerosene, are _____________ based and have a specific gravity ?

petroleum based

less than one (water being considered equal to one) and will float on water

p 480

14

Class B foam is effective in extinguishing hydrocarbon fuel fires and suppressing vapors because it ?

floats on the surface of hydrocarbon fuels

p 480

15

Fuels such as alcohol, acetone, ketones, and esters are what type of class B fuels ?

Polar solvents

p 480

16

Polar solvent fuels, such as alcohol, acetone, ketones, and esters, are know as _________ liquids because they mix with water.

miscible

p 480

17

Many modern fuels, including gasoline, are blended with up to 15 percent ________ additives. Treat these products as ________ _________ during emergency operations.

solvent / polar solvents

p 480

18

What 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

p 481

19

- A petroleum based organic compound that contains only hydrogen and carbon.

Hydrocarbon Fuel

p 481

20

- Liquid having a molecule where the positive and negative charges are permanently separated, resulting in their ability to ionize in solution and create electrical conductivity. Water, alcohol and sulfuric acid are examples.

Polar Solvents

p 481

21

- Materials that are capable of being mixed in all proportions.

Miscible

p 481

22

How foam works:
Foam extinguishes and/or suppresses vapors by the following methods
* ____________ - Creates a barrier between the fuel and the fire
* _________ - Lowers the temperature of the fuel and adjacent surfaces
* ____________ or ___________ - Prevents the release of flammable vapors, reducing the possibility of ignition or reignition.

* Separating
* Cooling
* Suppressing or smothering

p 481

23

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

Proportioning

p 482

24

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

94 to 99.9

p 482

25

Class A foams are formulated to be proportioned within certain limits established by the manufacturer to achieve specific objectives. These percentages may range from as little as ____ percent to ___ percent.

0.1 to 1 percent

p 482

26

Foam is proportioned using one of four basic methods:
* __________
* _________
* _______ ________
* ___________

* Induction
* Injection
* Batch Mixing
* Premixing

p 482-483

27

The ___________ method of proportioning foam uses the pressure of a water stream to induct (draft) foam concentrate into the fire stream.

induction method

p 483

28

Induction

This is achieved by passing the stream of water through a Venturi device called an __________.

eductor

p 483

29

Induction

A _________ ______ connected to the eductor is inserted into the foam concentrate container.

pickup tube

p 483

30

- Portable proportioning device that injects a liquid, such as foam concentrate, into the water flowing through a hoseline or pipe. (2) Venturi device that uses water pressure to draw foam concentrate into a water stream for mixing; also enables a pump to draw water from an auxiliary source.

Eductor

p 483