What class of fire extinguisher is most suitable for a liquid spill that has caught fire?

The most suitable class of fire extinguisher for a liquid spill that has caught fire is Class B. Class B fire extinguishers are specifically designed to combat fires involving flammable liquids, such as gasoline, oil, and solvents. These substances can ignite easily and burn intensely, requiring special extinguishing agents that can suppress their flames effectively.

Class B extinguishers commonly contain foam, carbon dioxide, or dry chemical agents that are effective in smothering combustion and cutting off the oxygen supply, which is essential for extinguishing these types of fires.

While Class A extinguishers are intended for ordinary combustibles like wood and paper, they are not effective on flammable liquids. Class C extinguishers are meant for electrical fires, and Class D extinguishers are used for fires involving combustible metals. Each of these classes has its own specific use, making it crucial to select the appropriate type based on the materials involved in the fire. Understanding the classification of fire extinguishers aids in responding effectively and safely to different fire scenarios.