Multipurpose dry chemical Agent is associated with which class?

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

Answer: (A)

Multipurpose dry chemical extinguishing agents are designed for multiple fire types. Specifically, the ABC dry chemical is effective on fires involving ordinary combustibles (Class A), flammable liquids (Class B), and energized electrical equipment (Class C). It works by interrupting the chemical reactions occurring in the flame and by coating surfaces to smother and cool, forming a barrier between fuel and oxygen. It is not suitable for metal fires (Class D), which require specialized metal-fire agents. So the correct concept is that this agent is associated with Class A, Class B, and Class C fire types, not just Class A alone.