Which class of fire extinguisher is appropriate for use on flammable liquids?

The appropriate class of fire extinguisher for use on flammable liquids is Class B. This classification is specifically designed to tackle fires that involve combustible liquids, such as gasoline, oil, and solvents. Class B extinguishers work by creating a barrier between the fuel and the oxygen in the environment, often using agents like foam, carbon dioxide, or dry chemical powders that effectively smother flames and prevent re-ignition.

In contrast, Class A extinguishers are intended for ordinary combustible materials such as wood, paper, and textiles, which are not applicable for flammable liquid fires. Class C extinguishers are suitable for electrical fires and involve non-conductive agents to safely extinguish flames without the risk of electrocution. Class D extinguishers are used for fires involving combustible metals, typically found in industrial settings, and are not suitable for dealing with flammable liquids. Understanding the distinct categories of fire extinguishers is essential for ensuring safety and effective fire response.