Which fire classes correspond to ordinary combustibles, flammable liquids, and electrical equipment?

• A. Class B for ordinary combustibles, Class A for flammable liquids, Class C for electrical equipment
• B. Class C for ordinary combustibles, Class A for flammable liquids, Class B for electrical equipment
• C. Class A for ordinary combustibles, Class C for flammable liquids, Class B for electrical equipment
• D. Class A for ordinary combustibles, Class B for flammable liquids, and Class C for electrical equipment

Answer: (D)

Fires are classified by the fuel involved. Ordinary combustibles—things like wood, paper, and cloth—fall under Class A. Flammable liquids such as gasoline, oil, and solvents belong to Class B. Electrical equipment fires are Class C because the presence of live electricity makes using conductive extinguishing methods dangerous; non-conductive agents are used instead. So the correct mapping is: ordinary combustibles → Class A, flammable liquids → Class B, electrical equipment → Class C. The other options mix up these associations, which is why they’re not correct.