Wet chemical extinguishers are associated with which fire class?

• A. Class B
• B. Class A
• C. Class D
• D. Class K

Answer: (D)

Wet chemical extinguishers are designed for fires involving cooking fats and oils. In fire classifications, those fires are categorized as Class K. The wet chemical agent (typically potassium acetate) works by saponifying fats to form a soapy layer, which cools the oil and creates a barrier that helps prevent re-ignition. This specialized action makes them ideal for commercial kitchens and not suitable for ordinary combustibles (like wood or paper), flammable liquids, or metal fires, which require different extinguishing methods. So, their use is associated with Class K.