A dry chemical extinguisher rated 60-B is capable of extinguishing a flammable liquid fire up to how many square feet?

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Prepare for the Ben Hirst Firefighter 1 Exam with multiple choice questions, detailed explanations, and essential tips for success. Get the knowledge you need to become a certified firefighter.

Multiple Choice

A dry chemical extinguisher rated 60-B is capable of extinguishing a flammable liquid fire up to how many square feet?

Explanation:
Understanding Class B ratings: the number before B indicates the approximate area, in square feet, that the extinguisher is expected to handle for a flammable liquid fire. A 60-B extinguisher therefore indicates about 60 square feet. This rating comes from standardized tests and assumes proper technique and a fully charged extinguisher. So the extinguisher is suitable for a fire affecting around 60 square feet of flammable liquid. The other numbers correspond to different area ratings and don’t match the 60-B specification.

Understanding Class B ratings: the number before B indicates the approximate area, in square feet, that the extinguisher is expected to handle for a flammable liquid fire. A 60-B extinguisher therefore indicates about 60 square feet. This rating comes from standardized tests and assumes proper technique and a fully charged extinguisher. So the extinguisher is suitable for a fire affecting around 60 square feet of flammable liquid. The other numbers correspond to different area ratings and don’t match the 60-B specification.

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