ELECTRICAL MACHINES QUIZ

  45°C.

 32°C.

 27°C.

 35°C.

 The torque required.

 The speed of motor.

 None of above.

 The voltage across the terminals.

 Eight times.

 Four times.

 Doubled.

 Remains same.

  3 - Φ AC supply.

  DC supply.

  external star-connected resistors.

  equalizing coils.

 constant torque drive above the base speed.

 constant hp drive below the base speed.

 constant power drive above base speed.

 constant torque drive below the base speed.

None of these

 Xd > Xq.

 Xd = Xq.

 Xd < Xq.

 start haunting.

 run at very low speed.

 run at very high speed.

 burn.

  consists of short-circuited copper bars embedded in the field pole faces.

  both (A) and (B).

  are provided on the stator for improving power factor.

  are provided in a synchronous motor to make it self starting.

  2 - 3 µF.

 5 - 10 F.

  1 - 2 µF.

 0.1 µF.

 Nr

 Zero

 S.Ns

 Ns