What shape is used in the traditional Class C extinguisher symbol?

What shape is used in the traditional Class C extinguisher symbol?

• A. Triangle
• B. Square
• C. Star
• D. Circle

Answer: (D)

In traditional extinguisher symbols, simple geometric shapes are used to identify which class of fire an extinguisher is suitable for, so you can recognize the right tool at a glance. The symbol for Class C, which covers energized electrical fires, is a circle. This circle is paired with the class concept because it’s distinct from the other shapes used for different classes, helping you differentiate quickly in an emergency. The other shapes map to different classes: a triangle is associated with ordinary combustibles (Class A), a square with flammable liquids (Class B), and a star with metal fires (Class D). While modern signs may vary, the circle remains the traditional, recognizable indicator for electrical fires.