ELECTRICAL MACHINES QUIZ

 its power factor will reduce

 its efficiency will improve

 its speed will reduce

 its speed will increase

  synchronous motor.

  transformer with short-circuited secondary.

  repulsion motor type starting.

  capacitor run IM.

  500 to 720.

  720 to 920.

  375 to 500.

  1440 to 2880.

 Where often load fluctuation is occurred.

  Where a constant voltage is required over a narrow load range.

 Where voltage variation is needed over a wide load range.

 Where the load is very high.

  P = 20, s = 3.33 %.

  P = 50, s = 4.43 %.

  P = 40, s = 5.79 %.

  P = 60, s = 0.96 %.

 Output power at the shaft.

 Power drawn in KW.

 Power drawn in KVA.

 Gross power.

  Differential compound motor.

  Cumulative compound motor.

  Series motor.

  Shunt motor.

None of these

 armature emf.

  reactance voltage induced in the coil.

  coil resistance.

 None of above.

 Back emf is equal.

 back emf is equal to applied voltage.

  Back emf is equal to half of applied voltage.

 0 < S < 1

 -2 < S < 2

 0 < S < 2

 -1 < S < 1