What is the traditional symbol for a Class B fire extinguisher?

• A. Red Square
• B. Green Triangle
• C. Blue Circle
• D. Yellow Star

Answer: (A)

Geometric shapes and colors on extinguisher labels help identify which fires they are designed to combat. For Class B fires, which involve flammable liquids, the symbol is a red square. The red square stands out and is distinct from the symbols for other classes, so you can quickly recognize the right extinguisher in an emergency. This quick recognition is crucial because using the wrong type can be ineffective or risky. Other classes use different shapes and colors: a green triangle for ordinary combustibles, a blue circle for electrical fires, and a yellow star for metal fires. The system is designed to make the correct choice fast and reduce mistakes when time is critical.