Which extinguisher is used for kitchen fires with cooking oils?

• A. Class D extinguisher
• B. Class K extinguisher
• C. Multipurpose extinguisher
• D. Wet chemical extinguisher

Answer: (B)

Cooking oil fires involve burning fats, which behave very differently from other fuels. You don’t want to use water or a generic extinguisher on hot oil, because water can cause the油 to splatter and spread the flames. Class K extinguishers are specifically designed for kitchens and fats/oils. They deliver a wet chemical agent that saponifies fats into a soapy layer, which cools the oil, forms a barrier between the fuel and air, and helps prevent reignition. That targeted action makes Class K the most effective and safest choice for fires involving cooking oils. While a wet chemical extinguisher is a type of Class K, the exam categorizes it as Class K, which is why this option is the best fit.