LABORATORY 1: Classification of Fires

• fuel

• heat or ignition source

• oxygen (air)

In the clinical chemistry laboratory, all the elements essential for fire to begin are present:

reaction chain

However, recent research suggest that a 4th factor may be present, and this factor has been classified as a ____ in which burning continues and even accelerates, it is caused by the breakdown and recombination of the molecules from the material burning with the oxygen in the atmosphere.

CLASS A

Ordinary combustibles

CLASS B

Flammable Liquids and Gases

CLASS C

Fires involving Live Electrical Equipment

CLASS D

Combustible Metals or Combustible Metal Alloys

CLASS K

Fires in Cooking Appliances that involve Combustible Cooking Media

Water, Dry Powder, Halon

Type of Extinguisher in Class A fires:

Carbon Dioxide, Dry Powder Halon

Type of Extinguisher in Class B fires:

Carbon Dioxide, Dry Powder Halon

Type of Extinguisher in Class C fires:

Special Agents

Type of Extinguisher in Class D fires:

CLASS A

Identifiy the Class of Fire:

wood

CLASS A

Identifiy the Class of Fire:

paper

CLASS A

Identifiy the Class of Fire:

rubber

CLASS A

Identifiy the Class of Fire:

fabrics

CLASS A

Identifiy the Class of Fire:

many plastics

CLASS B

Identifiy the Class of Fire:

gasoline

CLASS B

Identifiy the Class of Fire:

oils

CLASS B

Identifiy the Class of Fire:

paint

CLASS B

Identifiy the Class of Fire:

lacquer

CLASS B

Identifiy the Class of Fire:

tar

CLASS K

Identifiy the Class of Fire:

Vegetable or Animal oils

CLASS K

Identifiy the Class of Fire:

Fats

CLASS A

Pressurized-water extinguishers as well as foam and multipurpose dry-chemical types are used for ____ fires.

CLASS B & C

Multipurposedry-chemical and carbon dioxide extinguishers are used for ____.

computer equipment

Halogenated hydrocarbon extinguishers are particularly recommended for use with ____.

CLASS D

Present special problems, and extinguishment is left to trained firefighters using special dry-chemical extinguishers.

CLASS D

Try and isolate the burning metal from combustible sources with sand or ceramic barrier material.

RACE:

1. Rescue

2. Alarm

3. Contain

4. Extinguish

4 ESSENTIAL STEPS TO TAKE IF YOU DISCOVER A FIRE:

PASS:

1. Pull

2. Aim

3. Squeeze

4. Sweep

HOW TO PROPERLY OPERATE A FIRE EXTINGUISHER:

Rescue, Alarm, Contain, Extinguish

RACE?

Pull, Aim, Squeeze, Sweep

PASS?