Lubricant used for ball bearing is usually___________?

Related Mcqs:

DOL starting of induction motors is usually restricted to_____________?

A. low horsepower motors B. variable speed motors C. high horsepower motors D. high speed motors...

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...

Short-circuit test on an induction motor cannot be used to determine___________?

A. windage losses B. copper losses C. transformation ratio D. power scale of circle diagram...

Which is of the following data is required to draw the circle diagram for an induction motor ?

A. Block rotor test only B. No load test only C. Block rotor test and no-load test D. Block rotor test, no-load test and stator resistance test...

In an induction motor if air-gap is increased__________?

A. the power factor will be low B. windage losses will be more C. bearing friction will reduce D. copper loss will reduce In an induction motor...