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EEE :: Electrical Machine Design

  1. Dummy coil should not be used in

  2. A.

     small machines

    B.

     large machines

    C.

     either (A) or (B)

    D.

     none of the above


  3. Which of the following essential features is possessed by an indicating instrument ?

  4. A.

     Deflecting device

    B.

     Controlling device

    C.

     Damping device

    D.

     All of the above


  5. Multilayer helical windings are commonly used in the transformers as high voltage windings

  6. A.

     upto 20 kV

    B.

     upto 50 kV

    C.

     upto 80 kV

    D.

     for 110 kV and above


  7. Impose limitation on design.

  8. A.

     Saturation

    B.

     Temperature rise

    C.

     Efficiency

    D.

     Power factor

    E.

     All above


  9. The surge phenomenon is particularly important in case of

  10. A.

     low voltage transformers

    B.

     medium voltage transformers

    C.

     high voltage transformers

    D.

     any of the above


  11. Cylindrical windings using circular conductors, employed in transformers, are

  12. A.

     single layered

    B.

     double layered

    C.

     multi-layered

    D.

     none of the above


  13. The ratio of maximum displacement deviation to full scale deviation of the instrument is called

  14. A.

     static sensitivity

    B.

     dynamic deviation

    C.

     linearity

    D.

     precision or accuracy


  15. The pointer of an indicating instrument should be

  16. A.

     very light

    B.

     very heavy

    C.

     either (A) or (B)

    D.

     neither (A) nor (B)


  17. Electrical machines having a power output up to about 750 W may be called_______machines.

  18. A.

     small size

    B.

     medium size

    C.

     large size

    D.

     any of the above


  19. The heat dissipated by from a surface depends upon its temperature and its characteristics like colour, roughness etc.

  20. A.

     conduction

    B.

     convection

    C.

     radiation

    D.

     any of the above