Which class of fire involves ordinary combustibles?

• A. Class A
• B. Class B
• C. Class C
• D. Class D

Answer: (A)

Fires involving ordinary combustibles are classified as Class A. This group includes common materials like wood, paper, cloth, and cardboard that burn with an open flame and leave ash. The correct match is Class A because those everyday items are textbook examples of ordinary combustibles. The other classes correspond to different fuels: Class B is flammable liquids, Class C is energized electrical equipment, and Class D is combustible metals, so they do not describe ordinary combustibles.