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EEE :: Single Phase Motor

  1. A motor suitable for signaling device is
  2. A.
    induction motor
    B.
    dc shunt motor
    C.
    dc series motor
    D.
    reluctance motors

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  3. Which of the following single phase motors will operate at high power factor ?
  4. A.
    shaded pole motor
    B.
    capacitor run motor
    C.
    split phase motor
    D.
    capacitor start motor

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  5. A universal motor operates on
  6. A.
    constant speed and varying load
    B.
    constant load and varying speed
    C.
    approximately constant speed and load
    D.
    synchronous speed with varying load

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  7. The direction of rotation of universal motor can be reversed by
  8. A.
    reversing the supply terminals
    B.
    switching over from ac to dc
    C.
    interchanging the brush leads
    D.
    any of the above

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  9. Single phase motors are commercially manufactured up to
  10. A.
    1H.P.
    B.
    2 H.P.
    C.
    5 H.P.
    D.
    10 H.P.

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  11. The capacitance of a small single phase motor will be of the order of
  12. A.
    Kilo farads
    B.
    Few hundred farads
    C.
    Farads
    D.
    Micro or pico farads

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  13. In case of split phase motors the phase shift is usually limited to
  14. A.
    3 degrees
    B.
    60 degrees
    C.
    90 degrees
    D.
    150 degrees

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  15. For ceiling fans generally the single phase motor used is
  16. A.
    split phase type
    B.
    capacitor start type
    C.
    capacitor start and run type
    D.
    permanent capacitor type

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  17. In portable tools the speed of the driven shaft is reduced by
  18. A.
    Gearing
    B.
    Belt drive
    C.
    Chain drive
    D.
    Fluid coupling

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  19. Which of the following applications make use of a universal motor ?
  20. A.
    Floor polishing machine
    B.
    Oil expeller
    C.
    Portable tools
    D.
    Lathe machines

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