ELECTRICAL MACHINES QUIZ

 lags behind applied voltage by exactly 90Â&am

 leads the applied voltage somewhat less than 90Ã&

 leads the applied voltage by exactly 90Â&

 lags behind applied voltage somewhat less than 90Ã

  armature resistance, leakage reactance, armature reaction and earth connection.

  armature resistance, leakage reactance and armature reaction.

  armature resistance only.

  armature resistance and leakage reactance.

 1, 2 and 3 are correct

 1 and 3 are correct

 2 and 4 are correct

 1, 2 and 4 are correct

 using the magnetic core of low reluctance.

 increasing the number of turns.

 using soft material for winding.

 using transformer oil of better quality.

  none of above.

  air friction will prevent it.

  rotor torque will not be produced.

  induction motor will become synchronous motor.

 Any of the above.

 Open slot type machines.

 Semi closed slot type machine.

 Closed slot type machines.

  open circuit.

  decrease in speed.

  increase in speed.

  short circuit.

  all of below.

  less maintenance.

  simple in construction.

  less cost.

 voltage ratio of all transformers must be same.

 MVA rating of all transformer inversely proportional to impedance.

  polarities of all transformers must be same.

 percentage impedance of all transformers must be same.

  2 KW.

 0.

 10 KW.

 8 KW.