The shaft of an induction motor is made of_____________?
Correct answer: C. carbon steel
- A. high speed steel
- B. stainless steel
- C. carbon steel
- D. cast iron
Explanation
The shaft must withstand torsional stress, so carbon steel is commonly used because it is strong and tough. High-speed steel is a cutting-tool material, while cast iron is too brittle for a rotating shaft.
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