Which class of fire extinguisher is suitable for flammable liquids?

The correct choice for extinguishing fires involving flammable liquids is Class B. This class of fire extinguishers is specifically designed to combat fires that involve liquids such as gasoline, oil, paint, and other organic solvents. The extinguishing agents used in Class B extinguishers, like foam, dry chemical, or carbon dioxide, work effectively to suppress flames by either cooling the burning liquid, smothering the fire, or preventing oxygen from reaching the flames.

Class A extinguishers are meant for ordinary combustibles like wood, paper, and textiles. These agents are not suitable for liquid fires due to the differing combustion characteristics of solids versus liquids.

Class C extinguishers are designed for electrical fires, which also cannot be suppressed with the same methods used for liquid fires.

Class K extinguishers are specifically for kitchen fires involving cooking oils and fats and are not suited for the broader category of flammable liquids outside of that context.

Understanding these classifications helps ensure that the appropriate extinguisher is used in case of a fire, improving safety and effectiveness during an emergency situation.