Chapter 8: Portable Fire Extinguishers

Front 1

Fire extinguishers are used successfully to put out __________of fires every day,

Back 1

Hundreds

Front 2

Portable fire extinguishers have two primary uses: to extinguish incipient-stage fires and to control fires where traditional methods of fire suppression are not recommended.

Back 2

Extinguish incipient-stage

Where traditional methods not recommended

Front 3

The classification system for fire extinguishers uses both letters and numbers. The letters indicate the _________ of fire for which the extinguisher can be used, and the numbers indicate its ________________

Back 3

classes

effectiveness

Front 4

The pictograph system uses _______ rather than letters on the labels

Back 4

Symbols

Front 5

NFPA _______ lists the requirements for placing and mounting portable fire extinguishers as well as the appropriate mounting heights:

Back 5

10

Front 6

Portable fire extinguishers use seven basic types of extinguishing agents

Back 6

Water - Class A

Dry Chem - Class B & C

Carbon Dioxide - Class B & C

Foam - Class A & B

Halogenated - Class b and C

Dry Powders - Class D

When Chemical - Class K

Front 7

Most hand-held portable fire extinguishers have six basic parts:

Back 7

Cylinder or container

carrying handle

Nozzle or horn

Trigger and Discharge

Locking Mechanism

Pressure indicator or gauge

Front 8

here are six basic steps in extinguishing a fire with a portable fire extinguisher:

Back 8

Locate extinguisher

Proper Classification

Transport

Activate extinguisher

Apply Agent

Personal Safety

Front 9

The PASS acronym is a helpful way to remember these steps:

Back 9

Pull the pin

Aim the nozzle

Squeeze trigger

Sweep Nozzel

Front 10

A fire extinguisher must be ________after each and every use,

Back 10

recharged

Front 11

What is the material called that is used inside a fire extinguisher to stop the combustion process?

Back 11

Extinguishing agent

Front 12

: What would be an example of an incipient fire?

Back 12

A fire in a wastebasket

Front 13

What danger is there in using water on a fire involving energized electrical equipment?

Back 13

Many metals explode when energized and contacted by water.

Front 14

How many classes of fire are there? and List?

Back 14

Five Class A B C D K

Front 15

How does water work to put out a fire?

Back 15

It cools the fuel below its kindling temperature.

Front 16

What is the primary disadvantage of fire extinguishers over hoselines?

Back 16

One Shot Devices

Front 17

What happens if water is used on a grease fire and it is allowed to penetrate into the burning grease?

Back 17

It causes a volcanic eruption of the grease.

Front 18

How much heat, if any, can electricity generate?

Back 18

A tremendous amount of heat

Front 19

What may happen if water is applied to a burning combustible metal?

Back 19

A violent reaction may occur.

Front 20

How large can portable fire extinguishers be?

Back 20

Up to several hundred pounds

Front 21

_________ fires involve ordinary combustibles such as wood, paper, cloth, rubber, household rubbish, and some plastics.

Back 21

Class A

Front 22

_________ involve flammable or combustible liquids, such as gasoline, oil, grease, tar, lacquer, oil-based paints, and some plastics.

Back 22

Class B

Front 23

_________ involve energized electrical equipment, which includes any device that uses, produces, or delivers electrical energy.

Back 23

Class C

Front 24

_________ involve combustible metals such as magnesium, titanium, zirconium, sodium, lithium, and potassium. Special techniques and extinguishing agents are required to fight combustible metals fires.

Back 24

Class D

Front 25

: _________ involve combustible cooking oils and fats. This is a relatively new classification; cooking oil fires were previously classified as Class B fires.

Back 25

Class K

Front 26

The quantity of combustible materials present is sometimes called a building’s _________ and is measured as the average weight of combustible materials per square foot (or per square meter) of floor area.

Back 26

Fire Load

Front 27

_________ extinguishers are used to protect Class K (kitchen) installations, which are equipped with deep-fat fryers, cooking oils, and grills.

Back 27

Wet Chemical

Front 28

Which NFPA Standard addresses hydrostatic testing of fire extinguishers?

Back 28

10

Front 29

_______ is the process of converting the fatty acids in cooking oils or fats to soap or foam, the action caused by a Class K fire extinguisher.

Back 29

Saponification

Front 30

_______ contains more Class A combustibles and/or Class B flammables than do ordinary hazard locations.

Back 30

Extra (high) hazard