Key Terms

Automatic fire detection device: A device designed to automatically detect the presence of fire by heat, flame, light, smoke, or other products of combustion.

Buddy-breathing device: An accessory to self-contained breathing apparatus which permits a second person to share the same air supply as that of the wearer of the apparatus.

Dry chemical: An extinguishing agent composed of very small particles of chemicals.

Exit: The portion of an exit route that is generally separated from other areas to provide a protected way of travel to the exit discharge.

Exit route: A continuous and unobstructed path of exit travel from any point within a workplace to a place of safety.

Extinguisher classification: The letter classification given to an extinguisher to designate the class or classes of fire on which an extinguisher will be effective.

Fire: A very rapid chemical reaction between oxygen and a combustible material, which results in the release of heat, light, flames, and smoke.

Halon: A colorless, electrically nonconductive liquefied gas which is a medium for extinguishing fire by inhibiting the chemical chain reaction of fuel and oxygen.

High hazard area: An area inside a workplace in which operations include high hazard materials, processes, or contents.

Incipient stage fire: A fire that is in the initial or beginning stage and can be controlled or extinguished by portable fire extinguishers, a Class II standpipe, or small hose systems without the need for protective clothing or a breathing apparatus.

Inspection: A visual check of fire protection systems and equipment to ensure that they are in place, charged, and ready for use in the event of a fire.

Occupant load: The total number of persons that may occupy a workplace or portion of a workplace at any one time.

Quick disconnect valve: A device which starts the flow of air by inserting the hose into the regulator of a self-contained breathing apparatus, and stops the flow of air by disconnecting the hose from the regulator.

Travel distance: The measure of one's distance from a portable fire extinguisher at any given time.

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