ELECTRICAL MACHINES QUIZ

 increase the maintenance and repair

 increase the iron loss

All of these

 increases the design cost

 constant speed operation.

  high starting torque operation.

 none of these.

 low starting torque operation.

 armature reaction.

 presence of commutator.

 high resistance of carbon brushes.

  reactance voltage.

 4.76%.

 2.56 %.

 2.57 %.

 3.76%.

 A is bigger than B for the same current rating

 B is bigger than A for the same current rating

 A is bigger than B for the same voltage rating

 both are of the same size for the same current rating

  any one of the connection.

  no resistance is connected.

  parallel.

  series.

 can never be equal to pole pitch.

 none of above.

 must be exactly equal to people pitch.

  may or may not be exactly equal to people pitch.

 hysteresis loss

 eddy current loss

 copper loss

 both 1and 2

 4 X 1012 Ω - cm at 27°C and 0.4 X 1012

 3 X 1012 Ω - cm at 27°C and 0.3 X 1012

 2 X 1012 Ω - cm at 27°C and 0.2 X 1012

  1 X 1012 Ω - cm at 27°C and 0.1 X 1012

 increase.

None of these

 remains constant.

 decrease.