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Single Phase Induction Motors - Interview Questions and Answers

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51. For which of the applications a reluctance motor is preferred ?
A. Electric shavers
B. Refrigerators
C. Signalling and timing devices
D. Lifts and hoists
Explanation:
52. Torque developed by a single phase induction motor at starting is
A. pulsating
B. uniform
C. none of the above
D. nil
Explanation:
53. As hysteresis motors are free from mechanical and magnetic vibrations therefore these are considered as suitable for
A. fans
B. blowers
C. sound equipment
D. mixer grinders
Explanation:
54. In which single-phase motor, the rotor has no teeth or winding ?
A. Split phase motor
B. Reluctance motor
C. Hysteresis motor
D. Universal motor
Explanation:
55. The rotor of a hysteresis motor is made of
A. aluminium
B. cast iron
C. chrome steel
D. copper
Explanation:
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