A Class D fire involves which of the following materials?

A Class D fire involves which of the following materials?

• A. Combustible metals
• B. Flammable liquids
• C. Electrical equipment
• D. Wood, paper, etc.

Answer: (A)

Class D fires involve combustible metals that burn at very high temperatures and can react violently with water or many common extinguishing agents. Metals like magnesium, titanium, sodium, and potassium fall into this category, so you need a special approach: dry powder extinguishing agents designed for metals or smothering with an inert material like sand to isolate the metal from air and absorb heat. Water or standard extinguishing methods used for other classes can worsen the fire or cause dangerous reactions. The other options describe different fire classes: ordinary combustibles such as wood and paper (Class A), flammable liquids (Class B), and electrical equipment (Class C). They do not involve burning metals, so they’re not Class D.

Class D fires involve combustible metals that burn at very high temperatures and can react violently with water or many common extinguishing agents. Metals like magnesium, titanium, sodium, and potassium fall into this category, so you need a special approach: dry powder extinguishing agents designed for metals or smothering with an inert material like sand to isolate the metal from air and absorb heat. Water or standard extinguishing methods used for other classes can worsen the fire or cause dangerous reactions.

The other options describe different fire classes: ordinary combustibles such as wood and paper (Class A), flammable liquids (Class B), and electrical equipment (Class C). They do not involve burning metals, so they’re not Class D.