Which of the following agents is primarily a dry powder used specifically for class D fires?

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Multiple Choice

Which of the following agents is primarily a dry powder used specifically for class D fires?

Class D metal fires require a dry powder that is specifically formulated for metals. These powders coat the burning metal, isolate it from air, and absorb heat, forming a crust that helps prevent oxidation and reignition. Potassium chloride fits this role well, providing effective heat absorption and a protective layer that works on common metal fuels like magnesium and aluminum. The other options are not designed for metal fires: Halon is a clean agent used mainly for electrical and enclosed-space fires, while sodium bicarbonate and ABC dry chemical are multipurpose powders best suited for ordinary combustibles and some other types of fires, not for metal fires, and can be less effective or even unsafe for metals.

Class D metal fires require a dry powder that is specifically formulated for metals. These powders coat the burning metal, isolate it from air, and absorb heat, forming a crust that helps prevent oxidation and reignition. Potassium chloride fits this role well, providing effective heat absorption and a protective layer that works on common metal fuels like magnesium and aluminum. The other options are not designed for metal fires: Halon is a clean agent used mainly for electrical and enclosed-space fires, while sodium bicarbonate and ABC dry chemical are multipurpose powders best suited for ordinary combustibles and some other types of fires, not for metal fires, and can be less effective or even unsafe for metals.

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