Which of the following motors are best for the rolling mills ?
Correct answer: D. D.C. motors
- A. Single phase motors
- B. Squirrel cage induction motors
- C. Slip ring induction motors
- D. D.C. motors
Explanation
DC motors are traditionally preferred for rolling mills because they provide high starting torque, smooth wide-range speed control, and easy reversal. These features suit the heavy, rapidly varying loads of rolling processes.
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