Which extinguisher is described as being commonly a dry chemical type?

• A. Class D extinguisher
• B. Class K extinguisher
• C. Multipurpose extinguisher
• D. Wet chemical extinguisher

Answer: (C)

Multipurpose extinguishers are typically filled with a dry chemical powder. This versatile agent is effective on several fire types—ordinary combustibles, flammable liquids, and energized electrical equipment—so it’s commonly used in portable extinguishers intended for multiple hazards. The dry chemical works by coating the fuel, interrupting the chemical reactions in the flame, and creating a barrier between fuel and air, which helps extinguish the fire and reduce the chance of reignition. That broad applicability is why the multipurpose extinguisher is described as commonly being a dry chemical type. The other options are more specialized: for metal fires, a Class D powder is used; for kitchen oils and fats, wet chemical (Class K) is used; and a wet chemical extinguisher is designed for specific fats/oils, not a dry chemical approach.