Home / EEE / Single Phase Motor :: Single Phase Motor

EEE :: Single Phase Motor

  1. When a universal motor is operated on no load, its speed is limited by
  2. A.
    armature reaction
    B.
    armature weight
    C.
    windage and friction
    D.
    supply voltage frequency

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. As compared to other single phase ac motors a universal motor has
  4. 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

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. When a motor speed of 5000 rpm is required, which motor will you select ?
  6. A.
    Capacitor start motor
    B.
    Shaded pole motor
    C.
    Hysteresis motor
    D.
    Universal motor

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. The motor used for driving the record player deck is
  8. A.
    dc series motor
    B.
    synchronous motor
    C.
    hysteresis motor
    D.
    dc shunt motor

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. Which capacitor is preferred in case of single phase motor
  10. A.
    Paper capacitor
    B.
    Ceramic capacitor
    C.
    Mica capacitor
    D.
    Electrolytic capacitor

    View Answer

    Workspace

    Discuss Discuss in Forum


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

    View Answer

    Workspace

    Discuss Discuss in Forum


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

    View Answer

    Workspace

    Discuss Discuss in Forum


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

    View Answer

    Workspace

    Discuss Discuss in Forum


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

    View Answer

    Workspace

    Discuss Discuss in Forum


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

    View Answer

    Workspace

    Discuss Discuss in Forum