Question

class ______ fires involve combustible metals such as sodium, titanium, and magnesium.
○ a. a
○ b. b
○ c. c
○ d. d

Explanation:

Fire classification: Class D fires are defined as those involving combustible metals (like sodium, titanium, magnesium). Class A is ordinary combustibles, Class B is flammable liquids/gases, Class C is energized electrical equipment. So the correct class for combustible metals is D.

Answer:

d. D