Which of the following describes Class B combustibles?

Class B combustibles refer specifically to flammable and combustible liquids. These include substances such as gasoline, oil, and solvents that can ignite easily and burn at high temperatures. Understanding that Class B fires are primarily fueled by liquids is critical for firefighters, as it affects the training and techniques they use to manage such fires.

In addition to the nature of the fuels, Class B fires require specific types of extinguishing agents, such as foam or dry chemicals, which are effective in smothering flames and preventing re-ignition. This knowledge helps in making informed decisions during firefighting operations.

Other classes mentioned do not relate to Class B combustibles. For instance, ordinary combustibles like wood fall under Class A, while electrical hazards are classified as Class C. Combustion of metals typically refers to Class D fires, which involve burning metals such as magnesium or sodium. Each class of combustibles has its own properties and extinguishing methods, making it essential for firefighters to identify and understand these distinctions.