Which fire extinguisher class is for ordinary combustibles?

Which fire extinguisher class is for ordinary combustibles?

• A. Class B For Electrical
• B. Class A For Ordinary Combustibles
• C. Class C For Cooking Oils
• D. Class D For Metal Fires

Answer: (B)

Fires are categorized by the fuel involved, and ordinary combustibles such as wood, paper, and textiles fall into Class A. An extinguisher designed for Class A works by removing heat from the fuel, cooling it below its ignition temperature so the fire cannot continue. Water-based extinguishers (and some foam or dry-chemical counterparts labeled for Class A) are common choices because they effectively absorb a lot of heat. The other options target different fuels: electrical fires with nonconductive media, cooking-oil fires with specialized Class K agents, and metal fires with Class D agents. So for ordinary combustibles, the Class A extinguisher is the appropriate choice.

Fires are categorized by the fuel involved, and ordinary combustibles such as wood, paper, and textiles fall into Class A. An extinguisher designed for Class A works by removing heat from the fuel, cooling it below its ignition temperature so the fire cannot continue. Water-based extinguishers (and some foam or dry-chemical counterparts labeled for Class A) are common choices because they effectively absorb a lot of heat. The other options target different fuels: electrical fires with nonconductive media, cooking-oil fires with specialized Class K agents, and metal fires with Class D agents. So for ordinary combustibles, the Class A extinguisher is the appropriate choice.