Category: Single Phase Induction Motors

A. Capacitor run motor
B. Shaded pole motor
C. Hysteresis motor
D. Schrage motor

A. current in the starting winding leads the voltage
B. current in the starting winding lags the voltage
C. current in the starting winding is in phase with voltage in running winding
D. none of the above

A. slip rings
B. commutator
C. both A. and (b)
D. none of the above

A. hysteresis loss
B. magnetisation of rotor
C. eddy current loss
D. electromagnetic induction

A. 200 to 250 W
B. 250 to 500 W
C. 50 to 150 W
D. 10 to 20 W

A. at the end connections
B. at the end terminals
C. anywhere on the winding inside a slot
D. at the slot edge where coil enters or comes out of the slot

A. provide mechanical balance
B. improve power factor and provide better speed regulation
C. prevent hunting in the motor
D. eliminate armature reaction

A. a single turn of heavy wire which is in parallel with running winding
B. a single turn of heavy copper wire which is short-circuited and carries only induced current
C. a multilayer fine gauge copper wire in parallel with running winding
D. none of the above

A. is self-starting
B. is constant speed motor
C. needs no D.C. excitation
D. all of the above

A. friction
B. varying the resistance
C. tapping the field
D. centrifugal mechanism