AC 3 Phase Induction motor MCQ with Answers

AC 3 Phase Induction motor MCQ with Answers

31) Which speed control method of 3 f motor is used only induction motor supplied by generator?

Answer is:

By changing the number of stator poles

32) Which method of speed control is only applicable for 3 phase slipring induction motor?

Answer is:

Rotor rheostat speed control

33) Which method of speed control of 3 phase induction motor above and below normal speed can be obtained?

Answer is:

By changing applied voltage

34) Which method of speed control of 3 phase induction motor only two speeds can be obtained?

Answer is:

By changing the number of stator poles

35) Which method of speed control can be obtained from rotor side of 3 phase induction motor?

Answer is:

Cascade operation