Objective Questions on Construction of Alternator

  1. In a synchronous machine, the stator frame serves the purpose of
    1. in position and also in some cases for circulating cold water for cooling.

    Under construction.

  2. In an alternator, the stator frame is made of

    Under construction.

  3. The slip rings employed in a 3-phase synchronous machine are insulated for

    Under construction.

  4. Hydrogen is used in large alternators mainly to

    Under construction.

  5. The armature of an alternator

    Under construction.

  6. The stator core of a synchronous machine is built up of ___________________ lamination.

    Under construction.

  7. Which one of the following is the primary reason for placing field on rotor in an alternator ?

    Under construction.

  8. The electric current from the stator of an alternator is taken out to the external load circuit through

    Under construction.

  9. The stator core stampings also have openings which make __________________ ventilating ducts to provide efficient cooling.

    Under construction.

  10. In salient pole field structure, the pole shoes cover about ___________________ of pole pitch.

    Under construction.

  11. To obtain sinusoidal flux distribution, chamfering of poles is done in

    Under construction.

  12. In cylindrical rotor __________________ portion of rotor is wound.

    Under construction.

  13. Harmonics in the emf generated in an alternator can be reduced by

    Under construction.

  14. In a large synchronous generator, the damper winding is provided for

    Under construction.

  15. Squirrel-cage bars placed in the rotor pole faces of an alternator help reducing hunting

    Under construction.

  16. Which of following is not integral part of synchronous generator system ?

    Under construction.

  17. In a large generator, dampers

    Under construction.

  18. The choice of field construction, in an alternator, is basically determined by

    Under construction.

  19. An exciter for an alternator is a

    Under construction.

  20. The open slots are more commonly used in the stator of a synchronous machine as

    Under construction.