Water extinguishers are used for Class A fires.

Water extinguishers are used for Class A fires.

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

Answer: (A)

Water extinguishers are designed to cool the fuel, which stops the burning process for solid, ordinary combustibles like wood, paper, and textiles. That cooling action makes them effective for fires involving these materials, which are categorized as Class A. They’re not suitable for fires involving flammable liquids because water can spread the liquid and keep the fire going, or make the vapors more dangerous. For energized electrical equipment, water conducts electricity and can cause shocks or short circuits. For metal fires, many metals react with water, sometimes violently, so a different extinguishing agent is required. So the best use of a water extinguisher is for Class A fires only.

Water extinguishers are designed to cool the fuel, which stops the burning process for solid, ordinary combustibles like wood, paper, and textiles. That cooling action makes them effective for fires involving these materials, which are categorized as Class A. They’re not suitable for fires involving flammable liquids because water can spread the liquid and keep the fire going, or make the vapors more dangerous. For energized electrical equipment, water conducts electricity and can cause shocks or short circuits. For metal fires, many metals react with water, sometimes violently, so a different extinguishing agent is required. So the best use of a water extinguisher is for Class A fires only.