Previous Year Very Short Questions of EM (DIPLOMA electronics and communication engineering 3rd)

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Electrical machines

Previous year question paper with solutions for Electrical machines

Our website provides solved previous year question paper for Electrical machines . Doing preparation from the previous year question paper helps you to get good marks in exams. From our EM question paper bank, students can download solved previous year question paper. The solutions to these previous year question paper are very easy to understand.

These Questions are downloaded from www.brpaper.com You can also download previous years question papers of 10th and 12th (PSEB & CBSE), B-Tech, Diploma, BBA, BCA, MBA, MCA, M-Tech, PGDCA, B-Com, BSc-IT, MSC-IT.

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  1. In three phase delta connected system Iph = ………………….IL
  2. In two wattmeter method when the power factor of the load is zero leading or lagging, the two wattmeter will give ……………………reading.
  3. Direction of torque depends upon the ……………………….of the torque angle.
  4. D.C. motor starter is used to ………………….. the starting current.
  5. A slip of an induction motor at synchronous speed will be ……………….
  6. If Ns f and P are the synchronous speed, frequency and number of poles then Ns = ________
  7. When load on a synchronous motor increase its speed ……………..
  8. To operate compressor of a refrigerator usually ………………………motor is employed.
  9. Transformer core is laminated to reduce ………………..
  10. DC ………………………………motor are best suited for electric traction service.
  11. In a three phase system, the phase difference between two adjacent emf’s___________.
  12. For transmission of electric power______ system is used.
  13. Transformer core is made of silicon steel to reduce__________.
  14. The most common method of cooling employed in power transformer is_______.
  15. In motoring action, armature rotates in the same direction as that of___________ torque.
  16. Induction motor cannot run at___________ speed.
  17. The brushes of commutator are made of_________.
  18. A 4-pole dc lap winding will have ____________parallel paths.
  19. The function of starter in motor is __________.
  20. Rotor resistance control can be used only for_______.