What does the numeric rating on a Class A fire extinguisher denote?

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Multiple Choice

What does the numeric rating on a Class A fire extinguisher denote?

The numeric rating on a Class A extinguisher indicates how large a fire of ordinary combustibles it can extinguish, based on a standardized test. Each rating unit corresponds to roughly the extinguishing power of one gallon of water. So a higher number means greater extinguishing capacity—it can handle a larger fire before the extinguisher runs out. This rating reflects performance, not the physical size of the canister and not activity beyond ordinary combustibles.

The numeric rating on a Class A extinguisher indicates how large a fire of ordinary combustibles it can extinguish, based on a standardized test. Each rating unit corresponds to roughly the extinguishing power of one gallon of water. So a higher number means greater extinguishing capacity—it can handle a larger fire before the extinguisher runs out. This rating reflects performance, not the physical size of the canister and not activity beyond ordinary combustibles.

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