What type of fire does a Class B extinguisher specifically target?

A Class B fire extinguisher is specifically designed to combat fires that involve flammable liquids. This category of fires includes substances such as gasoline, oils, solvents, and paint, which can ignite and spread rapidly if not extinguished promptly. The agent within a Class B extinguisher, typically either foam, carbon dioxide, or dry chemical, works by cutting off the oxygen supply and preventing the flames from spreading, effectively cooling the burning liquid while also preventing re-ignition.

While fires involving grease and certain electrical fires are important factors for safety and response, they fall under different classifications. Grease fires (which can be flammable liquid fires) can be treated with Class B extinguishers, but it is essential to note that specific types of grease fires may require careful handling to avoid worsening the situation. Electrical fires, on the other hand, require extinguishing agents that are non-conductive, making Class C extinguishers more appropriate for those situations. Understanding the classification of fire types is critical for effective and safe firefighting tactics.