Class D fires involve which materials?

Class D fires involve which materials?

• A. Water and steam
• B. Combustible metals: magnesium, titanium, potassium, sodium
• C. Plastic and rubber
• D. Wood and paper

Answer: (B)

Class D fires involve combustible metals. Metals like magnesium, titanium, potassium, and sodium burn at very high temperatures and can react violently with water or many common extinguishing agents, so they require specialized methods rather than standard water or foam. The best approach uses dry powder extinguishing agents or inert smothering media to isolate the metal from oxygen and to prevent a violent reaction. So the option that lists combustible metals such as magnesium, titanium, potassium, and sodium is the correct one. The other options describe materials that belong to other fire classes or are not metals (water/steam isn’t a fire-class material, plastics/rubber and wood/paper align with different classes).

Class D fires involve combustible metals. Metals like magnesium, titanium, potassium, and sodium burn at very high temperatures and can react violently with water or many common extinguishing agents, so they require specialized methods rather than standard water or foam. The best approach uses dry powder extinguishing agents or inert smothering media to isolate the metal from oxygen and to prevent a violent reaction. So the option that lists combustible metals such as magnesium, titanium, potassium, and sodium is the correct one. The other options describe materials that belong to other fire classes or are not metals (water/steam isn’t a fire-class material, plastics/rubber and wood/paper align with different classes).