Slip ring motor is recommended where____________?

Related Mcqs:

Which of the following methods is easily applicable to control the speed of the squirrel-cage induction motor _____________?

A. By changing the number of stator poles B. Rotor rheostat control C. By operating two motors in cascade D. By injecting e.m.f. in the rotor circuit...

In three-phase squirrel-cage induction motors____________?

A. rotor conductor ends are short-circuited through slip rings B. rotor conductors are short-circuited through end rings C. rotor conductors are kept open D. rotor conductors are connected to insulation...

If a 3-phase supply is given to the stator and rotor is short circuited rotor will move___________?

A. in the opposite direction as the direction of the rotating field B. in the same direction as the direction of the field C. in any direction depending upon phase squence of supply...

A change of 4% of supply voltage to an induction motor will produce a change of approximately ________?

A. 4% in the rotor torque B. 8% in the rotor torque C. 12% in the rotor torque D. 16% in the rotor torque...

An induction motor can run at synchronous speed when____________?

A. it is run on load B. it is run in reverse direction C. it is run on voltage higher than the rated voltage D. e.m.f. is injected in the rotor circuit...