Ch. 5: Selection of Fire Extinguishers Flashcards
What factors are taken into consideration when selecting fire extinguishers?
(1) Type of fire most likely to occur
(2) Size of fire most likely to occur
(3) Hazards in the area where the fire is most likely to occur
(4) Energized electrical equipment in the vicinity of the fire
(5) Ambient temperature conditions
What class of fire are fires in ordinary combustible materials, such as wood, cloth, paper, rubber, and many plastics?
Class A fires
What class of fire are fires in flammable liquids, combustible liquids, petroleum greases, tars, oils, oil-based paints, solvents, lacquers, alcohols, and flammable gases?
Class B fires
What class of fire are fires that involve energized electrical equipment?
Class C fires
What class of fire are fires in combustible metals, such as magnesium, titanium, zirconium, sodium, lithium, and potassium?
Class D fires
What class of fire are fires in cooking appliances
that involve combustible cooking media (vegetable or
animal oils and fats)?
Class K fires
What type of fire extinguishers shall be limited to applications where a clean agent is necessary to extinguish fire efficiently without damaging the equipment or area being protected or where the use of alternative agents has the potential to cause a hazard to personnel in the area?
Halon agent fire extinguishers
What type of fire extinguisher shall be considered for
hazard protection in areas in which a fire risk assessment has shown the following:
(1) High hazard areas are present.
(2) Limited available personnel are present, thereby requiring an extinguisher that has a(n):
(a) High agent flow rate
(b) Increased agent stream range
(c) Increased agent capacity?
Wheeled fire extinguishers
What type of occupancy is classified as a location where the quantity and combustibility of Class A combustibles and Class B flammables are low and fires
with relatively low rates of heat release are expected?
These occupancies consist of fire hazards having normally expected quantities of Class A combustible furnishings, and/or the total quantity of Class B flammables typically expected to be present is less than 1 gal (3.8 L) in any room or area.
Light hazard occupancy
What type of occupancy is classified as a location where the quantity and combustibility of Class A combustible materials and Class B flammables are
moderate and fires with moderate rates of heat release are expected?
These occupancies consist of fire hazards that only
occasionally contain Class A combustible materials beyond normal anticipated furnishings, and/or the total quantity of Class B flammables typically expected to be present is from 1 gal to 5 gal (3.8 L to 18.9 L) in any room or area.
Ordinary hazard occupancy
What type of occupancy is classified as a location where the quantity and combustibility of Class A combustible material are high or where high amounts
of Class B flammables are present and rapidly developing fires with high rates of heat release are expected?
These occupancies consist of fire hazards involved with the storage, packaging, handling, or manufacture of Class A combustibles, and/or the total quantity of Class B flammables expected to be present is more than 5 gal (18.9 L) in any room or area.
Extra hazard occupancy
What type of extinguisher shall be used for pressurized and 3D Class B fires?
A large capacity dry chem extinguisher of at least 10 pounds with a discharge rate of at least 1 lb/sec
What types of extinguishers shall be installed in areas where pool chemicals containing chlorine or bromine are stored?
Only water or foam extinguishers are allowed in these areas.
Multipurpose dry chem extinguishers shall not be used.
