Answer :
Final answer:
The Class B rating for portable fire extinguishers is based on the approximate square foot area of flammable liquid that a non-expert can extinguish. The number accompanying this classification indicates the estimated area of a fire that a nonprofessional can handle.
Explanation:
The portable fire extinguisher rating based on the approximate square foot (or square meter) area of flammable liquid a nonexpert operator can extinguish is the Class B rating. This rating is specific to fires caused by flammable or combustible liquids, such as gasoline, kerosene, or oil. The number associated with the Class B rating indicates the approximate area of a fire that a non-expert person can expect to extinguish.
For instance, a Class B2 extinguisher should be able to extinguish a fire of roughly 2 square feet. This measure is based on the ability of the extinguisher and operator to diminish a square area of burning flammable liquid spreading flat and wide in ideal conditions.
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