Which class of fire involves flammable or combustible liquids?

Flammable or combustible liquids are classified under Class B fires. This classification specifically pertains to fires that involve liquids such as gasoline, oils, solvents, or any other substances that can ignite and burn rapidly.

Class B fires are significant because they require special methods of extinguishment that differ from other classes of fires. For instance, water is not effective for extinguishing Class B fires, as it can spread the flammable liquid and make the situation worse. Instead, extinguishing agents for Class B fires typically include foam, dry chemical extinguishers, or carbon dioxide, which can either smother the fire or inhibit the chemical reaction necessary for combustion.

Understanding the classification of fires is crucial for any fire safety training, particularly in environments like construction sites, where the presence of flammable liquids is common.