A multipurpose dry chemical extinguisher will extinguish _________ fires.

A multipurpose dry chemical extinguisher is specifically designed to extinguish fires of multiple classifications, which include Class A, B, and C fires.

Class A fires involve ordinary combustibles such as wood, paper, and cloth. Class B fires are related to flammable liquids like gasoline, oil, and greases. Class C fires encompass electrical equipment and wiring.

The effectiveness of multipurpose dry chemical agents is due to their ability to interrupt the chemical reaction of fire, as well as to cool burning materials in the case of Class A fires. For Class B fires, they create a barrier between the fuel and the oxygen, while for Class C fires, they can safely extinguish electrical flames as they do not conduct electricity.

This versatility makes the multipurpose dry chemical extinguisher a valuable tool in fire safety, allowing it to be used in various environments where different types of fires might occur. Hence, it is capable of tackling all three classes of fires—A, B, and C.