The ‘crawling” in an induction motor is caused by___________?

Related Mcqs:

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 speed of a squirrel-cage induction motor can be controlled by all of the following except_____________?

A. changing supply frequency B. changing number of poles C. changing winding resistance D. reducing supply voltage...

In a three-phase induction motor_______________?

A. iron losses in stator will be negligible as compared to that in rotor B. iron losses in motor will be neg¬ligible as compared to that in rotor C. iron losses in stator will be less than that in rotor D. iron losses in stator will be more than that in rotor...

The complete circle diagram of induetion motor can be drawn with the help of data found from__________?

A. noload test B. blocked rotor test C. stator resistance test D. all of the above...

The purpose of using short-circuit gear is___________?

A. to short circuit the rotor at slip rings B. to short circuit the starting resistances in the starter C. to short circuit the stator phase of motor to form star D. none of the above...