Answer :
Final answer:
Dry chemical extinguishers are mainly used to extinguish fires in Classes A and B, which include ordinary combustibles and flammable liquids. They are particularly versatile and can also be effective against Class C fires involving electrical equipment. However, the primary classes for dry chemical extinguishers are A and B.
Explanation:
Dry Chemical Extinguishers and Fire Classes
Dry chemical extinguishers are primarily designed to combat specific classes of fires, making them versatile tools in fire safety. The classes of fire include:
- Class A: Fires involving ordinary combustibles such as wood, paper, and cloth.
- Class B: Fires involving flammable liquids like gasoline, oils, and paints.
- Class C: Fires involving energized electrical equipment.
- Class D: Fires involving combustible metals.
- Class K: Fires in cooking appliances involving oils and fats.
Dry chemical extinguishers, particularly those using ABC powder, are effective against fires in Classes A, B, and C. Therefore, the correct answer to your question—regarding the classes of fire that dry chemical extinguishers are mainly used to extinguish—is Class A and B.
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