The number of slip rings on a squirrel cage induction motor is usually____________?

A. initial cost is the main consideration
B. maintenance cost is to be kept low
C. higher starting torque is the main consideration
D. all above considerations are involved

A. stator slots are equal to rotor slots
B. stator slots are exact multiple of rotor slots
C. stator slots are not exact multiple of rotor slots
D. none of the above

A. magnetic field and rotor rotate in opposite direction
B. rotor speed is less than the synchronous speed of the field and are in the same direction
C. rotor speed is more than the synchronous speed of the field and are in the same direction
D. none of the above

A. efficiency
B. power factor
C. frequency
D. output

A. star connected only
B. delta connected only
C. A. and B. both
D. none of the above

A. improve starting torque
B. reduce copper losses
C. improve efficiency
D. improve power factor