What type of fire can a Class D extinguisher be used for?

A Class D extinguisher is specifically designed to combat fires that involve combustible metals, such as magnesium, titanium, sodium, and potassium. Combustible metals burn at extremely high temperatures and may react violently with water or other common extinguishing agents. Therefore, Class D extinguishers contain specialized agents that work by smothering or cooling the burning metals without causing additional reactions, making them essential for handling such hazardous conditions safely.

In contrast, the other types of fires represented in the options require different classes of extinguishers. Ordinary combustibles, like wood or paper, are addressed with Class A extinguishers. Electrical fires are managed with Class C extinguishers, which do not conduct electricity and are safe for use on live electrical equipment. Flammable liquids, such as gasoline or oil, necessitate Class B extinguishers that are formulated to engulf burning liquids safely. Understanding the specific applications of each type of extinguisher is crucial for effective fire safety and response.