OSHA 30 Hour Construction Program Practice Test

Which type of fire is classified as Class K?

1. Combustible metals

2. Kitchen fires

3. Electrical fires

4. Ordinary combustibles

The correct answer is: Kitchen fires

Class K fires are specifically associated with cooking oils and fats, which are commonly found in commercial kitchens and are a significant concern in food service environments. These types of fires can be particularly dangerous because they often require special extinguishing agents that are designed for such materials. Class K fire extinguishers contain a wet chemical agent that can effectively cool and smother the fire, preventing it from reigniting. Understanding this classification is crucial for anyone involved in construction or maintenance within kitchens, as it informs the type of fire prevention and safety equipment that should be used in these settings. The other options refer to different classes of fire; combustible metals are categorized as Class D, electrical fires fall under Class C, and ordinary combustibles such as paper, wood, and textiles are classified as Class A. Each class of fire requires a different approach for extinguishing, underscoring the importance of recognizing the specific nature of Class K fires.