Which class is used for combustible metals?

• A. Class A
• B. Class B
• C. Class C
• D. Class D

Answer: (D)

Fires involving combustible metals require a metal-specific extinguishing approach. These metals—such as magnesium, sodium, potassium, titanium, and aluminum—burn at very high temperatures and can react violently with water or with standard extinguishing agents. Using water or typical fire extinguishers can worsen the situation or fail to stop the flame. The appropriate method uses a dry powder extinguisher formulated for metal fires. This powder blankets the metal, cools and isolates it from air, and helps absorb heat so the metal can no longer sustain the burn. This specialized agent is designed specifically for metal fires, unlike extinguishers for ordinary combustibles or flammable liquids.