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Single Phase Induction Motors - section-1
  1. In a split phase motor

    2. A.

     the starting winding is connected through a centrifugal switch
    B.

     the running winding is connected through a centrifugal switch
    C.

     both starting and running windings are connected through a centrifugal switch
    D.

     centrifugal switch is used to control supply voltage

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  2. In a ceilingfan employing capacitor run motor

    3. A.

     secondary winding surrounds the primary winding
    B.

     primary winding surrounds the secondary winding
    C.

     both are usual arrangements
    D.

     none of the above

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  3. Which type of load is offered by cranes and hoists ?

    4. A.

     Gradually varying load
    B.

     Non-reversing, no-load start
    C.

     Reversing, light start
    D.

     Reversing, heavy start

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  4. Which of the following motors is preferred for tape-recorders?

    5. A.

     Shaded pole motor
    B.

     Hysteresis motor
    C.

     Two value capacitor motor
    D.

     Universal motor

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  5. Which of the following motors is used in mixies ?

    6. A.

     Repulsion motor
    B.

     Reluctance motor
    C.

     Hysteresis motor
    D.

     Universal motor

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  6. A hysteresis motor works on the principle of

    7. A.

     hysteresis loss
    B.

     magnetisation of rotor
    C.

     eddy current loss
    D.

     electromagnetic induction

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  7. The value of starting capacitor of a fractional horse power motor will be

    8. A.

     100 uF
    B.

     200 uF
    C.

     300 uF
    D.

     400 uF

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  8. In a two value capacitor motor, the capacitor used for running purposes is

    9. A.

     air capacitor
    B.

     paper spaced oil filled type
    C.

     ceramic type
    D.

     a.c. electrolytic type

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  9. In capacitor start single-phase motors

    10. A.

     current in the starting winding leads the voltage
    B.

     current in the starting winding lags the voltage
    C.

     current in the starting winding is in phase with voltage in running winding
    D.

     none of the above

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  10. In a hysteresis motor, the rotor must have

    11. A.

     retentivity
    B.

     resistivity
    C.

     susceptibility
    D.

     none of the above

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