Class D fires refer to which of the following?

Class D fires specifically refer to fires that involve combustible metals, such as magnesium, titanium, and sodium. These metals can ignite at high temperatures and burn very fiercely, requiring special fire suppression methods. They are unique compared to other classes of fires due to the specific chemical properties of the metals involved, which can react with water or produce highly flammable gases when heated.

Each class of fire is categorized based on the type of fuel that is burning, which helps firefighters determine the appropriate extinguishing methods and materials. In contrast, ordinary combustibles would fall under Class A, flammable liquids under Class B, and electrical fires under Class C. Understanding the distinct characteristics and dangers of Class D fires is crucial for effective firefighting and safety in environments where these metals are present.