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A magnesium wheel assembly is burning after a brake fire. Which extinguishing method is correct, and why is water the wrong choice?
A
Use a halogenated (Halon) agent; interrupting the chemical chain reaction is most effective on Class D fires
B
Discharge CO2 onto the metal; oxygen displacement is the only mechanism that works on a Class D fire
C
Blanket the burning metal with a dry powder agent; water can be broken down by the hot metal and cause an explosive reaction that scatters molten material
D
Flood the fire with water; the cooling effect smothers a burning metal fire