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When should a Class K extinguisher be used?

A. For electrical fires
B. For oil and grease fires
C. For wood and paper fires
D. For metal fires

Answer :

Final answer:

A Class K extinguisher should be used for oil and grease fires, especially those occurring in commercial kitchens, not for electrical, wood, paper, or metal fires.

Explanation:

You should use a Class K extinguisher for oil and grease fires, typically found in commercial kitchens. Class K extinguishers are designed to deal with high-temperature cooking oil and grease fires, which cannot be extinguished effectively by water or ordinary extinguishers. They work by releasing a fine mist that cools the fire and reacts with the grease or oil to form a soap-like substance, effectively suppressing the fire.

Class K is not suitable for electrical fires, which require Class C extinguishers. Wood and paper fires are classified as Class A and should be addressed with extinguishers designated for that class. Finally, metal fires are a specialized type of fire requiring Class D extinguishers.

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