Electrical Machines
In a three phase star - delta transformer, what is the angle difference between primary and secondary phase voltages?

 Star side lags by -30°.
 Star side leads by 30°.
 Delta side leads by 30°.
  Delta side lags by -30°.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
For a single phase capacitor start induction motor which of the following is valid?

 Direction of rotation cannot be changed.
 Rotation can be changed by interchanging supply terminals.
 None of these.
  Rotation can be changed by reversing main winding terminals.

ANSWER DOWNLOAD EXAMIANS APP