Which scenario involves a Class D fire?

Which scenario involves a Class D fire?

• A. Involving cooking media
• B. Involving combustible metals
• C. Involving live electrical equipment
• D. Involving wood and paper

Answer: (B)

The scenario involves a fire with combustible metals. Class D fires are specifically for metals that burn, such as magnesium, titanium, sodium, or potassium. These metals react with water and some common extinguishing agents, so they require specialized dry powder extinguishing agents formulated for metals to smother the fire and interrupt the oxidation process. Other types are different: fires from cooking oils or fats are typically Class K (in commercial kitchens) or Class B for flammable liquids; fires from live electrical equipment are Class C (energized electrical); and ordinary combustibles like wood and paper are Class A.

The scenario involves a fire with combustible metals. Class D fires are specifically for metals that burn, such as magnesium, titanium, sodium, or potassium. These metals react with water and some common extinguishing agents, so they require specialized dry powder extinguishing agents formulated for metals to smother the fire and interrupt the oxidation process.

Other types are different: fires from cooking oils or fats are typically Class K (in commercial kitchens) or Class B for flammable liquids; fires from live electrical equipment are Class C (energized electrical); and ordinary combustibles like wood and paper are Class A.