Electrical Machines
Which type of motors are used for lathes?

 Synchronous motor.
 Either A or B.
 DC shunt motors.
 Cage induction motor.

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The introduction of interpoles in between the main poles improves the performance of a dc machine, because

 a counter-emf is induced in the coil undergoing commutation
 the flux waveform is improved with reduction in harmonics
 the interpoles produce additional flux to augment the developed torque
 the inequality of air-gap flux on the top and bottom halves of the armature is removed

ANSWER DOWNLOAD EXAMIANS APP