Which symbol or color combination would uniquely identify Class C extinguishers?

Which symbol or color combination would uniquely identify Class C extinguishers?

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

Answer: (A)

The key idea is how extinguisher labels indicate which class of fire they’re for. For Class C, which covers energized electrical fires, the label uses a blue circle as the identifying symbol. This blue circle signals that the extinguisher is suitable for use on live electrical equipment because the agent is nonconductive and safe around energized circuits. The other shapes and colors listed aren’t the standardized mark for Class C, so they wouldn’t uniquely identify this class.

The key idea is how extinguisher labels indicate which class of fire they’re for. For Class C, which covers energized electrical fires, the label uses a blue circle as the identifying symbol. This blue circle signals that the extinguisher is suitable for use on live electrical equipment because the agent is nonconductive and safe around energized circuits. The other shapes and colors listed aren’t the standardized mark for Class C, so they wouldn’t uniquely identify this class.