Which class of fire extinguisher is specifically designed for kitchen fires involving cooking oils?

Class K fire extinguishers are specifically designed for kitchen fires that involve cooking oils and fats. These extinguishers contain a special wet chemical agent that is effective in combating cooking oil fires, which can reach very high temperatures and can not only produce flames but also create a significant risk of re-ignition if not properly extinguished.

The unique formulation of Class K extinguishers works by chemically reacting with the burning oils to create a foam barrier, which helps to cool the fire and prevent the fire from reigniting. This is particularly important in professional kitchens where deep fryers or large quantities of cooking oil are used.

In contrast, Class A extinguishers are intended for ordinary combustibles like wood and paper, Class B extinguishers are for flammable liquids, and Class C extinguishers are meant for electrical fires. While these types cover a broad range of fire hazards, they are not suitable for the specific challenges posed by kitchen fires involving cooking oils, which is why Class K is the correct choice for this scenario.