The alphanumerical rating on extinguishers includes A and B; this indicates suitability for which classes of fire?

The alphanumerical rating on extinguishers includes A and B; this indicates suitability for which classes of fire?

• A. A
• B. A and B
• C. B
• D. A, B, and C

Answer: (B)

The alphanumeric rating on extinguishers shows what kinds of fires it can handle. The letter A means ordinary combustibles like wood, paper, and cloth; the letter B means flammable liquids like gasoline and oil. If a rating includes both A and B, the extinguisher is designed for fires involving both types of fuels. It wouldn’t automatically cover electrical fires unless a C rating is also present, and it won’t cover classes like metals or kitchen oils unless those classes are explicitly included. So, the best choice is the one that indicates the extinguisher is suitable for both ordinary combustibles and flammable liquids.

The alphanumeric rating on extinguishers shows what kinds of fires it can handle. The letter A means ordinary combustibles like wood, paper, and cloth; the letter B means flammable liquids like gasoline and oil. If a rating includes both A and B, the extinguisher is designed for fires involving both types of fuels. It wouldn’t automatically cover electrical fires unless a C rating is also present, and it won’t cover classes like metals or kitchen oils unless those classes are explicitly included. So, the best choice is the one that indicates the extinguisher is suitable for both ordinary combustibles and flammable liquids.