Class A fires are primarily composed of which type of materials?

Class A fires involve ordinary combustible materials that are easily ignited and produce ash upon burning. This includes common items such as paper, wood, cloth, and many types of plastics. These materials are typically found in everyday environments like homes and offices, making Class A fires the most common type encountered.

Understanding the classification helps in choosing the appropriate fire extinguishing method. For instance, water is effective in extinguishing Class A fires because it cools the material and removes heat from the fire. The other materials listed—for example, flammable liquids, electrical components, and metals—are classified as Class B, Class C, and Class D fires, respectively, requiring different handling and extinguishing techniques. This classification is crucial for safety protocols and effective emergency response in case of a fire emergency.