Extinguishers suitable for Class B fires are identified by a symbol containing the letter B.

Extinguishers suitable for Class B fires are identified by a symbol containing the letter B.

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

Answer: (C)

Extinguishers are labeled with symbols that show which fire types they can fight. For Class B fires, which involve flammable liquids, the standard symbol is a red square with the letter B inside. That makes it clear this extinguisher is rated for Class B fires. The other symbols (blue circle, green triangle, yellow star) are used for different classes or don’t include the B designation, so they don’t indicate Class B suitability. So the red square with the B is the symbol that identifies extinguishers appropriate for Class B fires.

Extinguishers are labeled with symbols that show which fire types they can fight. For Class B fires, which involve flammable liquids, the standard symbol is a red square with the letter B inside. That makes it clear this extinguisher is rated for Class B fires. The other symbols (blue circle, green triangle, yellow star) are used for different classes or don’t include the B designation, so they don’t indicate Class B suitability. So the red square with the B is the symbol that identifies extinguishers appropriate for Class B fires.