Electrical Machines
Dissolve gas analysis of transformer oil is carried out to determine

 condition of bushing stud.
 condition of transformer oil.
  condition of transformer.
 condition of bushings.

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Electrical Machines
Flashing the field of DC generator means

  making the magnetic losses forces parallel.
  creating residual magnetism by a DC source.
  neutralising residual magnetism.
 increasing flux density by adding extra turns of winding.

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