Fires in ordinary combustible materials such as wood and cloth are classified as which class?

Fires in ordinary combustible materials such as wood and cloth are classified as which class?

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

Answer: (B)

Fires are categorized by the fuel involved. Ordinary combustibles such as wood and cloth belong to Class A. This class is defined by fuels that burn and leave ash, and they are best controlled by cooling with water, which absorbs heat and stops the chemical reaction at the fuel surface, preventing ignition from rekindling. The other classes cover different fuels: flammable liquids (Class B), energized electrical equipment (Class C), and combustible metals (Class D). So for wood and cloth, Class A is the correct classification.

Fires are categorized by the fuel involved. Ordinary combustibles such as wood and cloth belong to Class A. This class is defined by fuels that burn and leave ash, and they are best controlled by cooling with water, which absorbs heat and stops the chemical reaction at the fuel surface, preventing ignition from rekindling. The other classes cover different fuels: flammable liquids (Class B), energized electrical equipment (Class C), and combustible metals (Class D). So for wood and cloth, Class A is the correct classification.