Which extinguisher is designed for metal fires like magnesium?

• A. Class D extinguisher
• B. Class K extinguisher
• C. Multipurpose extinguisher
• D. Wet chemical extinguisher

Answer: (A)

Fires involving burning metals require a specialized extinguishing agent that won’t react dangerously with the metal. Magnesium and other reactive metals burn at very high temperatures and can react with water or some foams, making the situation worse. A Class D extinguisher provides a dry powder designed specifically for metal fires. This powder blankets the metal, cooling it and cutting off the fuel from the air, which helps halt the burn without triggering a hazardous reaction. Because of this targeted action, it’s the most effective choice for metals like magnesium. Other extinguishers are intended for different fuels (such as cooking oils or ordinary combustibles) and aren’t suited to metal fires, and using them can be ineffective or unsafe.