Chapter 7 Portable Fire Extinguishers

Front 1

Portable fire fighting device designed to combat incipient fires

Back 1

Fire Extinguisher

Front 2

Extinguishing system that uses dry chemical as the primary extinguishing agent; often used to protect areas containing volatile flammable liquids

Back 2

Dry Chemical

Front 3

Extinguishing agent suitable for use on combustible metal fires

Back 3

Dry Powder

Front 4

Extinguishing system that uses a wet chemical solution as the primary extinguishing agent; usually installed in range hoods and associated ducting where grease may accumulate

Back 4

Wet Chemical System

Front 5

Any substance used for the purpose of controlling or extinguishing a fire

Back 5

Extinguishing Agent

Front 6

A phenomenon that occurs when mixtures of alkaline based chemicals and certain cooking oils come into contact resulting in the information of a soapy film

Back 6

Saponification

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In the fire service, associated with a fire extinguisher capable of atomizing water through a special applicator. Fire extinguishers use distilled water, while backpack pump type use ordinary water

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Water Mist

Front 8

Foam nozzle especially designed to provide the aeration required to make the highest quality foam possible; most effective appliance for the generation of low expansion foam

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Air Aspirating Foam Nozzle

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Chemical compounds that contain carbon plus one or more elements from the halogen series. Most commonly used as extinguishing agents for Class B and Class C fires

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Halogenated Extinguishing Agents

AKA Halogenated Hydrocarbons

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Capable of causing corrosion by gradually eroding, rusting, or destroying a material

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Corrosive

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Must be readily accessible

In working order

Suitable for the hazard

Large enough to control the size fire

User must know how to operate the extinguisher

Back 11

Things needed for an extinguisher to be effective

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Fires involving ordinary combustibles
Water or Dry Chemical

Back 12

Class A

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Fires involving flammable and combustible liquids

Dry chemical agents, halogenated agents, or foams

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Class B

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Fires involving energized electrical equipment

Nonconductive agents such as carbon dioxide, halon, and dry chemical or turning off power source

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Class C

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Fires involving combustible metals

No one extinguishing agent works on all of this type of fire

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Class D

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Fires that involve oils that are used in commercial cooking applications

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Class K

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Smothering- oxygen exclusion

Cooling- reducing the burning material temperature

Chain breaking- interrupting the chemical chain reaction

Saponification- forming an oxygen excluding soapy foam

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Extiguishing Methods

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Water

Back 18

A

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Foam

Back 19

AB

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Wet Chem

Back 20

AK

Front 21

Mist

Back 21

AC

Front 22

Ordinary Dry Chem

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BC

Front 23

Multi Purpose Dry Chem

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ABC

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Carbon Dioxide

Back 24

BC

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Dry Powder

Back 25

D

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Clean Agent

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BC or ABC

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Stored pressure

Cartridge

Pump

Invert

Back 27

Ways that extinguishing agents are expelled