What color is the shape associated with a Class D fire on a fire extinguisher?

A Class D fire involves combustible metals such as magnesium, sodium, and potassium. Because of the unique behavior of these metals when they come into contact with water or other common extinguishing agents, specialized extinguishers are used.

The yellow decagon shape on a fire extinguisher clearly identifies it as appropriate for Class D fires. This distinctive shape helps firefighters and personnel quickly recognize the type of extinguisher they have in case of an emergency involving combustible metals. Recognizing the color and shape allows for a rapid response, which is critical when dealing with these potentially dangerous fires.

Other colors and shapes indicated in the other options do not correspond to Class D fires. Each class of fire has its designated color and shape to aid in quick identification, emphasizing the importance of proper training and awareness in fire safety practices.