What are the four classes of fire extinguishers?

The four classes of fire extinguishers are essential for appropriately responding to different types of fires. Class A extinguishers are used for ordinary combustibles such as wood, paper, and cloth. Class B extinguishers are designed for flammable liquids like gasoline, oil, and grease. Class C extinguishers are meant for electrical fires, and Class D extinguishers are specifically for combustible metals.

Understanding these classes is crucial for ensuring the right type of extinguisher is accessible during emergencies. Each class represents different materials that could catch fire, and using the wrong type of extinguisher can exacerbate the situation or fail to extinguish the fire effectively. This classification system is widely recognized and used across various industries and settings, helping individuals respond appropriately in fire emergencies. The other options do not represent the correct classifications for fire extinguishers, focusing instead on arbitrary naming conventions that do not correlate with recognized fire safety standards.