Where D.C. motor of H.P. 12 or more requires frequent starting, stopping, reversing and speed control______________?
Correct answer: A. drum type controller is used
- A. drum type controller is used
- B. three point starter is used
- C. four point starter is used
- D. all above can be used
Explanation
A drum controller is designed for frequent starting, stopping, reversing and speed control of comparatively large motors. Three-point and four-point starters mainly provide starting and limited speed-control functions, not convenient reversing.
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