In which of the following applications the load on motor changes in cyclic order ?
Correct answer: D. All of the above
- A. Electric shovels
- B. Cranes
- C. Rolling mills
- D. All of the above
Explanation
Electric shovels, cranes, and rolling mills all have repeated accelerating, loading, unloading, and braking periods. Therefore, the motor load changes cyclically in each application.
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