Class D fires are typically extinguished using which type of agent?

Class D fires involve combustible metals, such as magnesium, titanium, and sodium, which require specialized extinguishing agents due to their unique burning characteristics. Dry powder agents are specifically designed to combat these types of fires effectively. They work by smothering the fire and interrupting the chemical reaction that sustains it, which is crucial when dealing with metals that can react violently with water or other agents.

Using water or foam on Class D fires can exacerbate the situation, as these agents might cause a violent reaction with the burning metals. Carbon dioxide, while effective on other types of fires, is also not suitable for Class D fires because it does not address the reactivity of the burning metals. Thus, dry powder is the correct choice for extinguishing Class D fires, ensuring safety and effectiveness.