What is a characteristic of Class D fires?

Class D fires are specifically characterized by the involvement of combustible metals, such as magnesium, titanium, aluminum, and potassium. These types of fires are distinct from other classes of fires due to the unique behavior of metals when they burn. For instance, burning metals can react violently with water, producing flammable hydrogen gas and posing significant dangers. The extinguishing agents for Class D fires typically include special dry powder agents that can smother the fire without reacting with the burning metals.

In contrast, Class A fires involve ordinary combustibles like wood, paper, and cloth; Class B fires involve flammable liquids such as gasoline or oils; and Class C fires involve electrical equipment. Each class has specific characteristics and corresponding firefighting techniques, making a clear understanding of these classifications vital for effective fire safety and response.