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EEE :: Single Phase Induction Motors

  1. The wattage of motor for driving domestic sewing machine will be around

  2. A.

     100 to 150 W

    B.

     40 to 75 W

    C.

     10 to 30 W

    D.

     5 to 10 W


  3. Short-circuiter is used in

  4. A.

     Repulsion induction motor

    B.

     Repulsion motor

    C.

     Repulsion start induction run motor

    D.

     None of the above


  5. The capacitors used in single-phase capacitor motors have no

  6. A.

     voltage rating

    B.

     dielectric medium

    C.

     polarity marking

    D.

     definite value


  7. Two-value capacitor motor finds increased application as compressor motor in small home air-conditioners because

  8. A.

     it is comparatively cheaper

    B.

     it has almost non-destructible capacitor

    C.

     it has low starting as well as running currents at relatively high power factor

    D.

     it is quiet in operation


  9. Which of the following motors is used in tape-recorders ?

  10. A.

     Hysteresis motor

    B.

     Reluctance motor

    C.

     Capacitor-run motor

    D.

     Universal motor


  11. Which of the following motors is used in a situation where load increases with speed ?

  12. A.

     Induction motor

    B.

     Three-phase series motor

    C.

     Schrage motor

    D.

     Hysteresis motor


  13. Which of the following single-phase motors is suitable for timing and control purposes ?

  14. A.

     Reluctance motor

    B.

     Series motor

    C.

     Repulsion motor

    D.

     Universal motor


  15. Which of the following motors has two separate windings on the motor ?

  16. A.

     Repulsion motor

    B.

     Repulsion induction motor

    C.

     Repulsion start induction run motor

    D.

     None of the above


  17. In a single phase motor the centrifugal switch

  18. A.

     disconnects auxiliary winding of the motor

    B.

     disconnects main winding of the motor

    C.

     reconnects the main winding the motor

    D.

     reconnects the auxiliary winding of the motor


  19. A single-phase induction motor is

  20. A.

     inherently self-starting with high torque

    B.

     inherently self-starting with low torque

    C.

     inherently non-self-starting with low torque

    D.

     inherently non-self-starting with high torque