An extinguisher suitable for Class D fires can be identified by what feature?

An extinguisher suitable for Class D fires is identified by a yellow star containing the letter D. Class D fires involve combustible metals, such as magnesium, titanium, and sodium, which require specific extinguishing agents that are effective for these types of materials. The yellow star with the letter D clearly indicates to firefighters and other users that the extinguisher is designed for use on metal fires. This labeling is crucial for ensuring that the appropriate extinguishing method is used, as using water or standard extinguishers can be dangerous and ineffective with metal fires. Recognizing the correct labeling directly supports safety and efficiency in fire-fighting efforts.