Each class A extinguisher has an A rating. Each unit of A rating provides protection for how many square feet?

Each class A extinguisher has an A rating. Each unit of A rating provides protection for how many square feet?

• A. 3000
• B. 1000
• C. 2000
• D. 4000

Answer: (A)

The main idea is that the Class A rating reflects how much area an extinguisher can protect against ordinary combustibles. In this rating system, each unit of A corresponds to 3,000 square feet of coverage under standard test conditions. So an extinguisher rated 1A would be expected to handle about 3,000 square feet, a 2A unit about 6,000 square feet, and so on. That’s why the amount of area associated with one A rating is 3,000 square feet. The other numbers don’t fit this course’s way of expressing A ratings.

The main idea is that the Class A rating reflects how much area an extinguisher can protect against ordinary combustibles. In this rating system, each unit of A corresponds to 3,000 square feet of coverage under standard test conditions. So an extinguisher rated 1A would be expected to handle about 3,000 square feet, a 2A unit about 6,000 square feet, and so on. That’s why the amount of area associated with one A rating is 3,000 square feet. The other numbers don’t fit this course’s way of expressing A ratings.