Which class of fire includes trash, wood, and paper?

The classification of fires is based on the materials that are burning, which determines the appropriate extinguishing method. Class A fires specifically involve ordinary combustibles such as trash, wood, paper, and cloth. These materials are common in many environments, and the combustion typically produces significant ash, which is a key characteristic of Class A fires.

For effective extinguishing, water is often the most effective agent for Class A fires because it cools the burning material and reduces the temperature below the ignition point. Other agents may also be used, but water remains the most accessible and efficient for these types of fires.

In contrast, other classes of fire are defined by different types of materials. Class C fires involve energized electrical equipment, Class D fires involve combustible metals, and Class B fires are associated with flammable liquids and gases. Therefore, identifying Class A as the category for materials like trash, wood, and paper is essential for understanding fire safety and response strategies.