Which statement about a Class A, B, C rating on an extinguisher is correct?

• A. It indicates the extinguisher is color-coded.
• B. It designates only Class C suitability.
• C. It indicates the extinguisher is refillable.
• D. ABC rating indicates suitability for Class A, B, and C fires.

Answer: (D)

The main idea here is what extinguisher ratings tell you about what fires it can handle. An ABC rating means the extinguisher is suitable for three fire classes: A for ordinary combustibles (like wood, paper), B for flammable liquids (like gasoline), and C for energized electrical equipment. So, when you see an ABC rating, it indicates you can use that extinguisher on all three types of fires.

This isn’t about color-coding or about whether the extinguisher can be refilled. Those factors are separate from the fire-class rating. The other statements don’t fit because they either describe color or refillability or limit the rating to a single class, which isn’t what ABC signifies.