What type of fire should a Class A extinguisher be used for?

• A. Electrical fires
• B. Flammable liquids
• C. Ordinary combustibles
• D. Cooking oils

Answer: (C)

A Class A fire extinguisher is specifically designed for fires involving ordinary combustibles. These include common materials such as wood, paper, cloth, and many types of plastics, which can ignite and produce flames. The extinguishing agents found in Class A extinguishers, such as water or foam, effectively cool these materials and remove heat from the fire, allowing it to be safely extinguished.

In comparison, the other options present different types of fire that require different extinguishing methods or agents. Electrical fires typically require a Class C extinguisher, which is designed to avoid conducting electricity. Flammable liquids need a Class B extinguisher, which utilizes agents that do not cause the flammable liquid to spread or re-ignite. Similarly, fires involving cooking oils, like those from deep fryers, should be addressed with a Class K extinguisher, which is specifically formulated for high-temperature cooking oils. Thus, understanding the appropriate use of fire extinguishers is critical for effective fire safety and response.