The colored background for a _____ extinguisher is a green triangle.

The colored background for a _____ extinguisher is a green triangle.

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

Answer: (C)

Understanding how extinguisher labels communicate what fires they can fight is the key idea. The symbols and colors on the label quickly tell you which fire classes the unit is rated for. A green triangle background is used to indicate a multipurpose extinguisher that covers all three common fire types—A, B, and C. That’s why this option fits best: it designates an extinguisher capable of handling ordinary combustibles, flammable liquids, and electrical fires. Extinguishers meant for just one class would not use this green-triangle symbol; they’d use a different, single-class indicator.

Understanding how extinguisher labels communicate what fires they can fight is the key idea. The symbols and colors on the label quickly tell you which fire classes the unit is rated for. A green triangle background is used to indicate a multipurpose extinguisher that covers all three common fire types—A, B, and C. That’s why this option fits best: it designates an extinguisher capable of handling ordinary combustibles, flammable liquids, and electrical fires. Extinguishers meant for just one class would not use this green-triangle symbol; they’d use a different, single-class indicator.