ch 7 Flashcards
An extinguishing agent used in dry-chemical fire extinguishers that can be used on Class A, B, and C fires.
Ammonium phosphate
A solution based on fluorinated surfactants plus foam stabilizers to produce a fluid aqueous film for suppressing liquid fuel vapors. (NFPA 10)
Aqueous file-forming foam
A colorless, odorless, electrically nonconductive inert gas that is a suitable medium for extinguishing Class B and Class C fires. (NFPA 10)
Carbon dioxide
A device that uses carbon dioxide gas as the extinguishing agent. It is rated for use on Class B and C fires.
Carbon dioxide fire extinguisher
A fire in ordinary combustible materials, such as wood, cloth, paper, rubber, and many plastics. (NFPA 1, 10)
Class A fire
A fire in flammable liquids, combustible liquids, petroleum greases, tars, oils, oil-based paints, solvents, lacquers, alcohols, and flammable gases. (NFPA 1, 10)
Class B fire
A fire that involves energized electrical equipment. (NFPA 10)
Class C fire
A fire in combustible metals, such as magnesium, titanium, zirconium, sodium, lithium, and potassium. (NFPA 1, 10)
Class D fire
A fire in a cooking appliance that involves combustible cooking media (vegetable or animal oils and fats). (NFPA 1, 10)
Class K fire
A fire extinguisher in which the expellant gas is in a separate container from the agent storage container. (NFPA 10)
Cartridge/cylinder-operated fire extinguisher
Electrically nonconducting, volatile, or gaseous fire extinguishant that does not leave a residue upon evaporation. (NFPA 10)
Clean agent
The body of the fire extinguisher where the extinguishing agent is stored.
Cylinder
A powder composed of very small particles, usually sodium bicarbonate, potassium bicarbonate, or ammonium phosphate based with added particulate material supplemented by special treatment to provide resistance to packing, resistance to moisture absorption (caking), and the proper flow capabilities. (NFPA 10)
Dry chemical
A fire extinguisher that uses a powder composed of very small particles, usually sodium bicarbonate, potassium bicarbonate, or ammonium phosphate based with added particulate material supplemented by special treatment to provide resistance to packing, resistance to moisture absorption (caking), and the proper flow capabilities. These fire extinguishers are rated for use on Class B and C fires, although some are also rated for Class A fires.
Dry-chemical fire extinguisher
Solid materials in powder or granular form designed to extinguish Class D combustible metal fires by crusting, smothering, or heat-transferring means. (NFPA 10)
Dry powder
A fire extinguisher that uses solid materials in powder or granular form to extinguish Class D combustible metal fires by crusting, smothering, or heat-transferring means.
Dry-powder fire extinguisher
A material used to stop the combustion process. These may include liquids, gases, dry-chemical compounds, and dry-powder compounds.
Extinguishing agent
Occupancies where the total amounts of Class A combustibles and Class B flammables are greater than expected in occupancies classed as ordinary (moderate) hazards. The combustibility and heat release rate of the materials are high.
Extra hazard locations
A protein-foam solution that uses fluorinated surfactants to produce a fluid aqueous film for suppressing liquid fuel vapors. (NFPA 10)
Film-forming fluoroprotein foam
The total energy content of combustible materials in a building, space, or area including furnishing and contents and combustible building elements expressed in MJ. (NFPA 557)
Fire load
Agents such as hydrochlorofluorocarbon (HCFC), hydrofluorocarbon (HFC), perfluorocarbon (PFC), fluoroiodocarbon (FIC) types of agents, and others that are found acceptable under the Environmental Protection Agency Significant New Alternatives Policy program. (NFPA 10)
Halocarbon
A fire extinguisher that uses a halogenated extinguishing agent; also called a clean agent fire extinguisher.
Halogenated-agent fire extinguisher
These agents include bromochlorodifluoromethane, bromotrifluoromethane, and mixtures thereof. (NFPA 10)
Halons
A hologenated agent whose chemical name is bromochlorodifluoromethane (CBrClF ⊽2) and that is a multipurpose, Class ABC-rated agent effective against flammable liquid fires. (NFPA 408)
**note that the cards do not show super/sub scripts.
⊽ = subscript number.
Meters Squared = m⊽ 2
Square Feet - m⊽ 2
Halon 1211
The grip used for holding and carrying a portable fire extinguisher.
Handle
The tapered discharge nozzle of a carbon dioxide fire extinguisher.
Horn
Pressure testing of a fire extinguisher to verify its strength against unwanted rupture. (NFPA 10)
Hydrostatic testing
Occupancies where the quantity, combustibility, and heat release of the materials are low, and the majority of materials are arranged so that a fire is not likely to spread.
Light hazard locations
A water-based fire extinguisher that uses an alkali metal salt as a freezing-point depressant.
Loaded-stream fire extinguisher
A device that locks a fire extinguisher’s trigger to prevent its accidental discharge.
Locking mechanism
A fire extinguisher that uses an ammonium phosphate-based extinguishing agent that is effective on fires involving ordinary combustibles, such as wood or paper, and fires involving flammable liquids. It is rated to fight Class A, B, and C fires.
Multipurpose dry-chemical fire extinguisher
A device for use in applications requiring special water discharge patterns, directional spray, or other unusual discharge characteristics. (NFPA 13)
Nozzle
Occupancies that contain more Class A and Class B materials than are found in light hazard locations. The combustibility and heat release rate of the materials is moderate.
Ordinary hazard locations
Acronym for the steps involved in operating a portable fire extinguisher: Pull pin, Aim nozzle, Squeeze trigger, Sweep across burning fuel.
PASS
A water-soluble flammable liquid such as alcohol, acetone, ester, and ketone.
Polar solvent
A gauge on a pressurized portable fire extinguisher and indicates the internal pressure of the expellant.
Pressure indicator
A nonpressurized, manually operated water-type fire extinguisher that is rated for use on Class A fires. Discharge pressure is provided by a hand-operated, double-acting piston pump.
Pump tank fire extinguisher
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.
Saponification
An agent that has sufficient vapor pressure at normal operating temperatures to expel itself from a fire extinguisher.
Self-expelling agent
A fire extinguisher in which both the extinguishing agent and expellant gas are kept in a single container and the includes a pressure indicator or gauge. (NFPA 10)
Stored-pressure fire extinguisher
A fire extinguisher in which water or a water-based extinguishing agent is stored under pressure.
Stored-pressure water-type fire extinguisher
A retaining device that breaks when the locking mechanism is released.
Tamper seal
The button or lever used to discharge the agent from a portable fire extinguisher.
Trigger
The U.S. organization that tests and certifies that fire extinguishers (among many other products) meet established standards.
Underwriters Laboratories
A fire extinguisher containing distilled or de-ionized water and employing a nozzle that discharges the agent in a fine spray. (NFPA 10)
Water mist fire extinguisher
Normally an aqueous solution of organic or inorganic salts or a combination thereof that forms an extinguishing agent. (NFPA 10)
Wet-chemical extinguishing agent
A fire extinguisher containing a wet-chemical extinguishing agent for use on Class K fires.
Wet-chemical fire extinguisher
A fire extinguisher that expels water combined with a concentrate to reduce the surface tension and increase its ability to penetrate and spread.
Wetting-agent fire extinguisher
