Important Industrial Drive Multiple Choice Questions and Answers
31. The cost of an induction motor will increase as
A. Horse power rating increases but rpm decreases
B. Horse power rating decreases but rpm increases
C. Horse power rating and operating speed increases
D. Horse power rating and operating speed decreases
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A. Horse power rating increases but rpm decreases
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32. Which of the following motors has series characteristics?
A. Shaded Pole motor
B. Repulsion motor
C. Capacitor start motor
D. None of the above
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33. Which of the following motors is preferred for boom host of a travelling crane?
A. Single phase motor
B. Synchronous motor
C. AC slip ring motor
D. Ward Leonard controlled DC shunt motor
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34. For crane travel which off the following motors is normally used?
A. Synchronous motor
B. DC differential compound motor
C. Ward Leonard controlled DC shunt motor
D. AC slip ring motor
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35. Which of the following happens when start Delta starter is used ?
A. Starting voltage is reduced
B. Starting current is reduced
C. None of the above
D. Both A and B
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