A Class K fire extinguisher is used for which setting?

A Class K fire extinguisher is used for which setting?

• A. Residential electrical fires
• B. Fire extinguisher used in industrial kitchen
• C. Aqueous film forming foam on aircraft
• D. Class A ordinary combustibles in offices

Answer: (B)

Fires involving cooking fats and oils in commercial kitchens require a specialized extinguisher. Class K extinguishers use a wet chemical agent (typically potassium acetate) that saponifies fats into a soapy layer, which cools the oil and creates a soapy barrier that smothers the flame and helps prevent reignition. This design specifically targets high-temperature oil fires found in industrial kitchens, making that setting the best fit. Residential electrical fires are handled with media appropriate for energized equipment, not cooking fats. Foam or other agents used for aircraft fuel fires aren’t intended for kitchen oil fires, and ordinary combustibles like wood and paper are addressed with extinguishers designed for those materials. So, the industrial kitchen is the correct setting for a Class K extinguisher.

Fires involving cooking fats and oils in commercial kitchens require a specialized extinguisher. Class K extinguishers use a wet chemical agent (typically potassium acetate) that saponifies fats into a soapy layer, which cools the oil and creates a soapy barrier that smothers the flame and helps prevent reignition. This design specifically targets high-temperature oil fires found in industrial kitchens, making that setting the best fit.

Residential electrical fires are handled with media appropriate for energized equipment, not cooking fats. Foam or other agents used for aircraft fuel fires aren’t intended for kitchen oil fires, and ordinary combustibles like wood and paper are addressed with extinguishers designed for those materials. So, the industrial kitchen is the correct setting for a Class K extinguisher.