Class K fires primarily involve which fuel type?

Class K fires primarily involve which fuel type?

• A. Electrical fires
• B. Gasoline fires
• C. Cooking fats and oils
• D. Wood and paper

Answer: (C)

Fires are categorized by the fuel that feeds them. Class K specifically covers fires from cooking fats and oils, which are common in commercial kitchens. These fats ignite and burn at high temperatures and can splatter, so they require a specialized extinguisher that uses wet chemical agents to saponify the fats, forming a soapy layer that cools and blankets the oil to prevent re-ignition. That makes cooking fats and oils the correct choice. The other options involve different fuels: electrical fires involve energized equipment, gasoline fires are flammable-liquid fires, and wood/paper fires are ordinary combustibles.

Fires are categorized by the fuel that feeds them. Class K specifically covers fires from cooking fats and oils, which are common in commercial kitchens. These fats ignite and burn at high temperatures and can splatter, so they require a specialized extinguisher that uses wet chemical agents to saponify the fats, forming a soapy layer that cools and blankets the oil to prevent re-ignition. That makes cooking fats and oils the correct choice. The other options involve different fuels: electrical fires involve energized equipment, gasoline fires are flammable-liquid fires, and wood/paper fires are ordinary combustibles.