Class D extinguishers are designed for which type of fires?

Class D extinguishers are designed for which type of fires?

• A. Flammable liquids
• B. Ordinary combustibles
• C. Combustible metals
• D. Electrical fires

Answer: (C)

Fires involving combustible metals require a different approach than other fire types. Class D extinguishers are designed specifically for metal fires and use a dry powder extinguishing agent that coats the metal and isolates it from air while absorbing heat. This prevents re-ignition and avoids reactions that can occur with water or other common extinguishing agents. Metals such as magnesium, titanium, sodium, potassium, aluminum, and others fall into this category, so a dedicated Class D agent is used. Other fire types—like ordinary combustibles (wood, paper), flammable liquids, or electrical fires—need different extinguishing methods and agents, which is why those categories are not suitable for metal fires.

Fires involving combustible metals require a different approach than other fire types. Class D extinguishers are designed specifically for metal fires and use a dry powder extinguishing agent that coats the metal and isolates it from air while absorbing heat. This prevents re-ignition and avoids reactions that can occur with water or other common extinguishing agents. Metals such as magnesium, titanium, sodium, potassium, aluminum, and others fall into this category, so a dedicated Class D agent is used.

Other fire types—like ordinary combustibles (wood, paper), flammable liquids, or electrical fires—need different extinguishing methods and agents, which is why those categories are not suitable for metal fires.