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

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

• A. 40ft2
• B. 60ft2
• C. 120ft2
• D. 150ft2

Answer: (B)

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.