Stepless speed control of induction motor is possible by which of the following methods ?

Related Mcqs:

Star-delta starting of motors is not possible in case of____________?

A. single phase motors B. variable speed motors C. low horse power motors D. high speed motors...

It is advisable to avoid line-starting of induction motor and use starter because__________?

A. motor takes five to seven times its full load current B. it will pick-up very high speed and may go out of step C. it will run in reverse direction D. starting torque is very high...

The ‘cogging’ of an induction motor can be avoided by____________?

A. proper ventilation B. using DOL starter C. auto-transformer starter D. having number of rotor slots more or less than the number of stator slots (not equal)...

In case of 3-phase induction motors, plugging means__________?

A. pulling the motor directly on line without a starter B. locking of rotor due to harmonics C. starting the motor on load which is more than the rated load D. interchanging two supply phases for quick stopping...

In induction motor, percentage slip depends on__________?

A. supply frequency B. supply voltage C. copper losses in motor D. none of the above...