Water Extinguishing Agent is associated with which classes?

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

Answer: (B)

Water extinguishing agents work by absorbing heat and cooling the fuel, which makes them most effective for fires involving ordinary combustibles like wood, paper, and textiles (Class A). They are not suitable for fires involving flammable liquids (Class B) because water can spread the liquid and worsen the fire; they’re not used on energized electrical equipment (Class C) since water conducts electricity; and they’re not used on metal fires (Class D) because many reactive metals react violently with water. So, the association is with Class A fires. If you encounter blends or specialized agents like foam, those can extend applicability to Class B, but plain water itself is primarily tied to Class A.