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Industrial Drives - Interview Questions and Answers

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6. Belted slip ring induction motor is almost invariably used for
A. water pumps
B. jaw crushers
C. centrifugal blowers
D. none of the above
Explanation:
7. Which feature, while selecting a.motor for centrifugal pump, will be of least significance ?
A. Starting characteristics
B. Operating speed
C. Horse power
D. Speed control
Explanation:
8. The starting torque of a D.C. motor is independent of which of the following?
A. Flux
B. Armature current
C. Flux and armature current
D. Speed
Explanation:
9. Which of the following motors are pre-ferred for overhead travelling cranes ?
A. Slow speed motors
B. Continuous duty motors
C. Short time rated motors
D. None of the above
Explanation:
10. Rotor of a motor is usually supported on _______ bearings.
A. ball or roller
B. needle
C. bush
D. thrust
Explanation:
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