Which class of fire involves combustible liquids?

The classification of fires is based on the materials that are burning, and this categorization is crucial for determining the appropriate suppression methods. Class B fires specifically involve combustible liquids and gases, including substances like gasoline, grease, alcohol, and oil. These materials are flammable and can present unique challenges in firefighting, as they can spread rapidly and produce explosive vapors.

Firefighting techniques for Class B fires often include the use of foam or dry chemical extinguishing agents that can effectively smother the flames by interrupting the chemical reaction and reducing the supply of oxygen. Understanding that Class B is dedicated to liquid fires allows firefighters to select the right equipment and tactics tailored to the nature of the material burning.

By knowing that Class A refers primarily to ordinary combustibles like wood and paper, Class C relates to electrical fires, and Class D pertains to flammable metals, one can appreciate the specificity of Class B for liquid fuels and the importance of this classification in devising a safe and effective firefighting strategy.