Which Class of fire extinguisher is used for flammable liquids such as gasoline and solvents, often with foam or dry chemical or CO2?

• A. Class C
• B. Class A
• C. Class D
• D. Class B

Answer: (D)

Fires involving flammable liquids require extinguishing methods that blanket the fuel and reduce the chance of vapor ignition. Extinguishers designed for liquids use foam, dry chemical, or CO2 to coat the surface, cool the liquid, or displace the air, which is why they’re used for gasoline and solvents. Other extinguisher types target different hazards: those for ordinary combustibles deal with solid fuels like wood and paper, those for electrical fires use non-conductive agents, and those for metal fires require specialized powders. For liquid fires, the extinguisher designed for liquids is the best fit, often featuring foam or dry chemical or CO2.