Synchronous Motors MCQ - Electrician (Set-1) with Answers

Synchronous Motors MCQ - Electrician (Set-1) with Answers

6) The maximum valve of torque angle in a synchronous motor is _____ degrees electrical

Answer is:

90

7) The direction of rotation of a synchronous motor can be reversed by reversing

Answer is:

supply phase sequence

8) A synchronous machine is called a doubly excited machine, because

Answer is:

both its rotor and stator are excited

9) In a synchronous motor, damper winding is provided in order to

Answer is:

both 1) suppress rotor oscillations and 2) develop necessary starting torque

10) While running a synchronous motor is compelled to run at synchronous speed because of

Answer is:

magnetic locking between stator and rotor poles