Final answer:
Class A fire involves ordinary combustibles such as textiles, paper, plastics, rubber, and wood.
Step-by-step explanation:
The class of fire that involves ordinary combustibles such as textiles, paper, plastics, rubber, and wood is Class A fire.
Class A fires involve common materials that are easily ignited and sustain combustion. These fires typically leave behind ash and char after burning.
For example, if a fire breaks out in a room with wooden furniture and paper documents, it would be classified as a Class A fire.
Class A fires involve ordinary combustible materials, such as cloth, wood, paper, rubber, and many plastics. Extinguishers with an A rating are designed to extinguish fires involving these ordinary combustible materials.
Class A—fires involving ordinary combustibles, such as paper, trash, some plastics, wood and cloth. A rule of thumb is if it leaves an ash behind, it is a Class A fire. Class B—fires involving flammable gases or liquids, such as propane, oil. and gasoline. Class C—fires involving energized electrical components.