Green triangle symbol on an extinguisher indicates it is rated for use on which class of fire?

• A. Class A
• B. Class B
• C. Class C
• D. Class D

Answer: (A)

The green triangle marks a fire extinguisher’s rating for ordinary combustibles—Class A. This includes common materials like wood, paper, and fabrics. The shapes and colors on extinguisher labels are a quick way to identify what fires the extinguisher can safely fight. So, a green triangle specifically means it’s suitable for Class A fires. Other classes use different symbols and colors (for example, Class B for flammable liquids, Class C for energized electrical fires, Class D for metal fires), and some extinguishers are multipurpose and show multiple symbols.