Important Electrical Machine Design Multiple Choice Questions and Answers

11.  Which off the following bearings are plain bearings ?

   A. Pedestal bearings

   B. Shield bearings

   C. Ball bearings

   D. All of the above

12.  Which of the following bearings are classified as sleeve bearings?

   A. Pedestal bearings

   B. Shield bearings

   C. Ball and roller bearings

   D. both pedestal and shield bearings

13. ..............bearings are most commonly used in electrical machines up to rating of 500 kW

   A. Ball and roller

   B. Thrust

   C. Both A and B

   D. None of the above

14.  Which of following bearings is classified as anti-fiction bearings?

   A. Ball bearings

   B. Roller bearings

   C. Pedestal bearings

   D. Both ball and roller bearings

15.  Stiff shaft is necessary in case of induction motor is due to

   A. Small air gap

   B. Pulsating torque

   C. High operating speed

   D. All of the above

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