Which fire extinguisher rating and quantity are listed as the recommended equipment?

Which fire extinguisher rating and quantity are listed as the recommended equipment?

• A. One 4A 40-B
• B. Two 4A 20-BC
• C. Three 5A 20-C
• D. Two 2A 10-B

Answer: (B)

The key idea is understanding what extinguisher ratings mean and why multiple units with broad coverage are preferred. An extinguisher that includes an A rating shows it can handle ordinary combustibles like wood and paper, while the BC portion indicates it can deal with flammable liquids and electrical fires. Having two extinguishers that offer both A and BC coverage gives versatile protection for a space where you might encounter a range of fire types—wood/paper, solvents or gasoline, and energized equipment. The two units also provide redundancy and better access: if one is farther away or used up, you’ve still got another ready to go. Other options fall short because they either omit the BC (so they’re not suitable for liquid or electrical fires) or they reserve strength only for A-type fires, or they don’t provide enough extinguishing capacity in total. In a mixed-fire environment, two units with combined A and BC capability give the most practical, safer coverage.

The key idea is understanding what extinguisher ratings mean and why multiple units with broad coverage are preferred. An extinguisher that includes an A rating shows it can handle ordinary combustibles like wood and paper, while the BC portion indicates it can deal with flammable liquids and electrical fires. Having two extinguishers that offer both A and BC coverage gives versatile protection for a space where you might encounter a range of fire types—wood/paper, solvents or gasoline, and energized equipment. The two units also provide redundancy and better access: if one is farther away or used up, you’ve still got another ready to go.

Other options fall short because they either omit the BC (so they’re not suitable for liquid or electrical fires) or they reserve strength only for A-type fires, or they don’t provide enough extinguishing capacity in total. In a mixed-fire environment, two units with combined A and BC capability give the most practical, safer coverage.