Answer :
Final answer:
A water fire extinguisher is used to put out Class A fires, which involve ordinary combustible materials. Other fire classes (B, C, and D) involve different materials and require other types of fire extinguishers.
Explanation:
A water fire extinguisher is designed to put out Class A fires. Class A fires are fires involving ordinary combustible materials such as wood, paper, cloth, trash, and plastics. The water in these extinguishers cools the material below its ignition temperature and soaks the material to prevent re-ignition.
Understanding the classes of fires
Class B fires involve flammable liquids such as gasoline, oil, and paint. Class C fires are electrical fires, and Class D fires involve combustible metals. It's vital to use the correct type of fire extinguisher for each class of fire; using the wrong one could spread the fire or even cause a dangerous reaction.
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