The blue-labelled extinguisher is effective against which combination?

• A. Cooking oils/Fats
• B. Wood fires
• C. Wood/Textiles/Papers, Flammable liquids, Electrical fires
• D. Electrical fires

Answer: (C)

The blue-labelled extinguisher represents a versatile dry chemical powder extinguisher designed for multiple fire classes. It works by interrupting the chemical reactions occurring in the flame and by coating the fuel to prevent reignition, making it effective on a range of fires. Specifically, it covers ordinary combustibles like wood, textiles, and papers; flammable liquids; and electrical fires. That combination corresponds to fires involving common solid fuels, liquids like fuels and solvents, and energized electrical equipment, so this extinguisher is well-suited for those situations. Note that fires caused by cooking oils/fats (often class F) require a different, kitchen-specific extinguisher, while a single-class extinguisher would not handle all three categories as effectively.