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

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

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If the applied voltage of a certain transformer is increased by 50% and the frequency is reduced by 50%, the maximum flux density will (assuming that the magnetic circuit remains unsaturated)

 changes to 1.5 times the original value
 changes to three times the original value
 remain the same as the original
 changes to 0.5 times the original value

ANSWER DOWNLOAD EXAMIANS APP