Final answer:
Fires involving combustible materials such as paper and wood are classified as Class A. This classification is important for determining the appropriate fire-fighting methods. Option A is correct.
Step-by-step explanation:
The class of fire involving materials such as paper, cardboard, wood, and similar combustibles is known as Class A. Fires of this type can occur from various sources, including fuel combustion in vehicles, industrial processing, unplanned waste combustion, and residential wood burning.
Recognizing the classification of fires is crucial for effective fire prevention and safety, as it determines the best methods for extinguishing the fire. For example, Class A fires can be put out with water or monoammonium phosphate, whereas other types of fires might require different extinguishing agents.
Fires involving paper, cardboard, wood, etc., are graded as Class A. Class A fires involve common combustible materials like wood, paper, cloth, and rubber. They are fueled by ordinary combustible materials and can be extinguished with water or a Class A fire extinguisher.