Which symbol identifies Class D extinguishers (color and shape)?

• A. Green triangle A
• B. Blue circle C
• C. Red square B
• D. Yellow star D

Answer: (D)

Fires involving combustible metals (Class D) are identified by a distinctive yellow star on the extinguisher label. The bright yellow color and the star shape are standardized to stand out and signal that this extinguisher is specifically for metal fires, which require a different extinguishing approach than ordinary combustibles or liquids. Using the correct symbol helps responders quickly grab the right extinguisher and avoid using the wrong type, which can be ineffective or even dangerous for metal fires. The other shapes and colors (like green, blue, or red) correspond to different fire classes, so they don’t indicate Class D.