OFM Fire Life Safety Educator Practice Exam

A multipurpose dry chemical extinguisher will extinguish which fires?

A fires B fires C fires A, B, and C fires

Correct Answer:

A, B, and C fires

Explanation:

A multipurpose dry chemical extinguisher is rated for Class A, B, and C fires, so it can handle ordinary combustibles, flammable liquids, and energized electrical fires. The powder blankets the flame and cools the fuel to below ignition for A fires, forms a barrier and interferes with the chemical reactions in B fires, and is non-conductive to allow use on live electrical equipment for C fires. Because it covers all three fire types, it extinguishes A, B, and C fires.

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