Which of the following is a characteristic of Class B fires?

Class B fires are specifically characterized by their involvement with flammable liquids and gases. These fires can be ignited by substances such as gasoline, oil, alcohol, and various solvents. Because these materials can produce flammable vapors, they pose a unique risk that requires specific extinguishing methods, typically involving foam, dry chemical, or carbon dioxide extinguishers.

Understanding this classification is crucial for effective fire response and prevention strategies, as the methods to combat a Class B fire differ significantly from those used for other classes of fires. For instance, using water on a Class B fire can aggravate the situation, as it may cause the burning liquid to spread.

In contrast, the other types highlighted in the choices represent different classes of fires. For example, fires fueled by metals (like magnesium or sodium) fall under Class D fires, and ordinary combustibles like wood or paper are Class A fires. Electrical fires are categorized as Class C fires. Recognizing these distinctions is essential for anyone involved in fire protection and emergency response.