Which of the following motors are pre-ferred for overhead travelling cranes ?
Correct answer: C. Short time rated motors
- A. Slow speed motors
- B. Continuous duty motors
- C. Short time rated motors
- D. None of the above
Explanation
Overhead travelling cranes operate intermittently with frequent starting, stopping and reversing, so their motors are designed for short-time or intermittent duty. Continuous-duty motors would be unnecessarily large and are not the usual choice.
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