What is a characteristic of Class D fires?

Class D fires are specifically associated with combustible metals, such as magnesium, titanium, and sodium. The most effective extinguishing agents for these types of fires are dry powder agents, which are specifically designed to smother and chemically inhibit the combustion of these metals. These dry powder agents are crucial for dealing with Class D fires because water, typical for Class A fires, can react violently with burning metal, potentially exacerbating the fire.

In the context of fire classifications, understanding the materials involved is essential. While other classes of fires such as A, B, and C have specific extinguishing methods, Class D uniquely requires this dry powder approach due to the dangerous reactions that can occur with water or other agents. This characteristic is why the use of dry powder agents is a defining and crucial aspect in managing Class D fires.