The colored background for a Class K extinguisher is a black hexagon.

The colored background for a Class K extinguisher is a black hexagon.

• A. Blue hexagon
• B. Black hexagon
• C. Red square
• D. Yellow circle

Answer: (B)

Labels use a color and a geometric shape to identify which class of fire an extinguisher is intended to combat. For Class K, which covers cooking oils and fats, the standardized pictogram background is black and the shape is a hexagon. This combination is designed to be quickly recognized in busy, heat-filled kitchen environments, so you can grab the right extinguisher fast. The other options don’t fit because they pair different colors or shapes that correspond to other classes, not Class K. So the black hexagon is the correct signal for Class K.

Labels use a color and a geometric shape to identify which class of fire an extinguisher is intended to combat. For Class K, which covers cooking oils and fats, the standardized pictogram background is black and the shape is a hexagon. This combination is designed to be quickly recognized in busy, heat-filled kitchen environments, so you can grab the right extinguisher fast. The other options don’t fit because they pair different colors or shapes that correspond to other classes, not Class K. So the black hexagon is the correct signal for Class K.