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    Objective Questions

    Objective Questions on Single Phase Motors | Part 2

    • Categories Objective Questions
    MCQ

     

    Part 1Part 2Part 3Part 4Part 5

    16. Single phase motors are commercially manufactured up to

      A   1 H.P.
      B   2 H.P.
      C   5 H.P.
      D   10 H.P.



    17. The direction of rotation of universal motor can be reversed by

      A   reversing the supply terminals
      B   switching over from ac to dc
      C   interchanging the brush leads
      D   any of the above.

               

    18. A universal motor operates on


      A   constant speed and varying load
      B   constant load and varying speed
      C   approximately constant speed and load
      D   synchronous speed with varying load.


               


    19. Which of the following single phase motors will operate at high power factor ?


      A   shaded pole motor
      B   capacitor run motor
      C   split phase motor
      D   capacitor start motor.


               

    20. A motor suitable for signaling device is

      A   induction motor
      B   dc shunt motor
      C   dc series motor
      D   reluctance motors.



               

    21. Which capacitor is preferred in case of single phase motor

      A   Paper capacitor
      B   Ceramic capacitor
      C   Mica capacitor
      D   Electrolytic capacitor.


               

    22. The motor used for driving the record player deck is

      A   dc series motor
      B   synchronous motor
      C   hysteresis motor
      D   dc shunt motor.


               

    23. When a motor speed of 5000 rpm is required, which motor will you select ?

      A   Capacitor start motor
      B   Shaded pole motor
      C   Hysteresis motor
      D   Universal motor.


               

    24. As compared to other single phase ac motors a universal motor has

      A   speed ratio of 2   1 on ac/dc
      B   highest efficiency on 50 Hz supply
      C   high horse power/kg ratio
      D   all of the above.


               

    25. When a universal motor is operated on no load, its speed is limited by

      A   armature reaction
      B   armature weight
      C   windage and friction
      D   supply voltage frequency.


               

    26. Which of the following applications make use of a universal motor ?

      A   Floor polishing machine
      B   Oil expeller
      C   Portable tools
      D   Lathe machines.


               

    27. In portable tools the speed of the driven shaft is reduced by

      A   Gearing
      B   Belt drive
      C   Chain drive
      D   Fluid coupling.


               

    28. For ceiling fans generally the single phase motor used is

      A   split phase type
      B   capacitor start type
      C   capacitor start and run type
      D   permanent capacitor type.


               

    29. In case of split phase motors the phase shift is usually limited to

      A   3 degrees
      B   60 degrees
      C   90 degrees
      D   150 degrees.

    MCQ




    30. The capacitance of a small single phase motor will be of the order of

      A   Kilo farads
      B   Few hundred farads
      C   Farads
      D   Micro or pico farads.

    Part 1Part 2Part 3Part 4Part 5

     

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    Speed Control of DC Motor (Shunt, Series and Compound)
    December 6, 2013

    Next post

    Objective Questions on Single Phase Motors | Part 3
    December 10, 2013

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