Which of the following is an example of a Class B fire?

A Class B fire is defined as a fire that involves flammable liquids and gases. This classification includes materials such as gasoline, oil, paint, and solvents. These substances can ignite and produce flames that spread quickly, making it crucial to use the correct type of extinguishing agent to effectively combat them.

In the context of the other choices, fires involving metal (option A) typically fall under Class D fires, which require specialized extinguishing methods. Fires involving wood (option C) are considered Class A fires, which generally consist of ordinary combustibles. Finally, fires involving cooking oil (option D) fall under Class K fires, which specifically pertain to kitchen-related fires involving deep fat or cooking oils. Understanding the different classifications is essential for effective fire prevention and response strategies.