Category: Single Phase Induction Motors

A. magnetic relay
B. thermal relay
C. centrifugal switch
D. none of the above

A. the starting winding is connected through a centrifugal switch
B. the running winding is connected through a centrifugal switch
C. both starting and running windings are connected through a centrifugal switch
D. centrifugal switch is used to control supply voltage

A. reduce the effects of armature reaction
B. increase the torque
C. reduce sparking at the brushes
D. none of the above

A. interchanging the supply leads
B. position of shaded pole with respect to main pole
C. retentivity of the rotor material
D. none of these

A. become unstable
B. draw excessive armature current and may burn out
C. fall out of synchronism and come to stand still
D. run as induction motor

A. air capacitor
B. paper spaced oil filled type
C. ceramic type
D. a.c. electrolytic type

A. A.C. motor
B. D.C. shunt motor
C. D.C. series motor
D. none of the above

A. Electric shavers
B. Refrigerators
C. Signalling and timing devices
D. Lifts and hoists

A. improves the efficiency
B. helps the rotor teeth to remain under the stator teeth
C. helps in reducing the tendency of the rotor teeth to remain under the stator teeth
D. improves the power factor

A. Capacitor start motor
B. Capacitor run motor
C. Split phase motor
D. Shaded pole motor