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EEE :: Industrial Drives

  1. The .......motors, because of their inherent characteristics, are best suited for the rolling mills
  2. A.
    dc motors
    B.
    slip ring induction motors
    C.
    squirrel cage induction motors
    D.
    single phase motors

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  3. Motors preferred for rolling mill drive is
  4. A.
    dc motors
    B.
    ac slip ring motors with speed control
    C.
    any of the above
    D.
    none of the above

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  5. The range of horse power of electric motor drives for rolling mills is of the order of
  6. A.
    1 to 10 HP
    B.
    15 to 25 HP
    C.
    50 to 100 HP
    D.
    100 to 500 HP

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  7. For handing fragile articles in a crane
  8. A.
    low speed is preferred
    B.
    medium speed is preferred
    C.
    high speed is preferred

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  9. A pole changing type squirrel cage motor used in derricks has four, eight and twenty four poles. In this the lowest speed is used for
  10. A.
    lifting
    B.
    hoisting
    C.
    lowering
    D.
    landing the load

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  11. A pole changing type squirrel cage motor used in derricks has four, eight and twenty four poles. In this the medium speed is used for
  12. A.
    lifting
    B.
    hoisting
    C.
    lowering
    D.
    landing the load

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  13. The number of sets used in pole changing type squirrel cage motors for derricks and winches, is
  14. A.
    2
    B.
    3
    C.
    4
    D.
    6

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  15. Which of the following drive can be used for derricks and winches ?
  16. A.
    DC motors with Ward Leonard control
    B.
    AC slip-ring motors with variable resistance
    C.
    Pole changing squirrel cage motors
    D.
    Any of the above

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  17. 1/2 hour rated motors are used for
  18. A.
    light duty cranes
    B.
    medium duty cranes
    C.
    heavy duty cranes
    D.
    none of the above

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  19. Heavy duty cranes are used in
  20. A.
    Heavy engineering workshops
    B.
    Steel plants
    C.
    Ore handling plants
    D.
    All of the above

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