Blaze Through the Certified Fire Protection Specialist (CFPS) Exam 2025 – Ignite Your Career Now!

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What types of fires can Class K extinguishers specifically put out?

Flammable liquids

Cooking oils and fats

Class K extinguishers are specifically designed for use on fires that involve cooking oils and fats, particularly those commonly found in commercial kitchens and food preparation areas. These types of fires can ignite due to high temperatures in cooking appliances like deep fryers. Class K extinguishers contain agents like potassium acetate, which effectively saponifies the fats and oils, turning them into a non-flammable soap-like substance, thereby suppressing the fire.

While other types of extinguishers are appropriate for flammable liquids, electrical fires, and general combustibles, they are not tailored to address the unique challenges posed by fires fueled by cooking oils and fats. This specificity is crucial, as using the wrong type of extinguisher on a Class K fire could lead to worsening the situation or even causing re-ignition.

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Electrical fires

General combustibles

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