ELECTRICAL MACHINES QUIZ

 all bright lamp method.

  all of these.

 one dark two bright.

 all dark lamp method.

 Separately Excited DC Motor

 Compound Wound DC Motor

 DC Series Motor

 DC Shunt Motor

 Field flux.

 Armature current Ia.

 All of these.

 Applied voltage.

 non-ferrous material.

 conducting material.

 silicon steel.

 insulating material.

  rotate in direction opposite to that before maintenance.

  get heated and damaged.

  not start at all.

  rotate in the same direction as before maintenance.

 lie under south pole.

 lie under north pole.

 there is no hard and fast rule for this.

 lie in the inter polar gaps.

 sin (α/2)

 Cos α

 Cos α²

 Cos (α/2)

 greater than that of turbo alternator.

 equal to that of the effective length of the line.

  none of these.

 greater than that of hydro generator.

 percentage impedance of all transformers must be same.

 voltage ratio of all transformers must be same.

  polarities of all transformers must be same.

 MVA rating of all transformer inversely proportional to impedance.

 generation of voltage.

 electromechanical energy conversion.

 development of torque.

 commutation.