Which statement about Class A fires is true?

Which statement about Class A fires is true?

• A. They involve flammable liquids
• B. They involve electrical fires
• C. They involve combustible materials such as wood and paper
• D. They involve combustible metals

Answer: (C)

The key idea is how fires are categorized by the type of fuel. Class A fires involve ordinary combustibles—materials that burn and typically leave ash. That includes wood, paper, cloth, and cardboard. So the statement that they involve combustible materials such as wood and paper is the correct one because it directly identifies the common fuels in this class. Flammable liquids are associated with Class B fires, electrical fires with Class C, and certain metals with Class D. The reasoning is that each class is defined by the fuel source and its burning characteristics, which guides how the fire should be extinguished. For Class A, cooling with water is effective to reduce the temperature of the solid fuel and stop the flame.

The key idea is how fires are categorized by the type of fuel. Class A fires involve ordinary combustibles—materials that burn and typically leave ash. That includes wood, paper, cloth, and cardboard. So the statement that they involve combustible materials such as wood and paper is the correct one because it directly identifies the common fuels in this class.

Flammable liquids are associated with Class B fires, electrical fires with Class C, and certain metals with Class D. The reasoning is that each class is defined by the fuel source and its burning characteristics, which guides how the fire should be extinguished. For Class A, cooling with water is effective to reduce the temperature of the solid fuel and stop the flame.