Which extinguisher is listed as suitable for Class A and B fires?

• A. Dry Powder Extinguishing Agent
• B. Ordinary Dry Chemical Extinguishing Agent
• C. Multipurpose dry chemical Agent
• D. Foam AFFF Extinguishing Agent

Answer: (B)

Understanding extinguishing agents and fire classes helps you pick the right tool for multiple fire types. For a fire involving ordinary combustibles (Class A) and flammable liquids (Class B), the agent needs to handle both kinds of fuel and suppress the flame quickly. Ordinary dry chemical extinguishing agents do this by releasing a fine powder that interrupts the chemical reactions happening in the flame and by leaving a crust on solid fuels that helps prevent reignition while also smothering flammable liquids. This dual-action makes it suitable for both A and B fires, which is why it’s identified as the best choice in this context. Foam can also work on A and B fires, but the listed option here is the ordinary dry chemical agent, chosen for its proven effectiveness across those two classes.