Single Phase Induction Motors Mcqs
Q.1: Which of the following motor will give relatively high starting torque ___________?S
A. Capacitor start motor
B. Capacitor run motor
C. Split phase motor
D. Shaded pole motor
Q.2: In a capacitor start motor, the phase displacement between starting and running winding can be nearly__________?p
A. 10
B. 30
C. 60
D. 90
Q.3: In capacitor start single-phase motors____________?3
A. current in the starting winding leads the voltage1
B. current in the starting winding lags the voltage0
C. current in the starting winding is in phase with voltage in running windingK
D. none of the above
Q.4: In a split phase motor, the running winding should have?8
A. high resistance and low inductance"
B. low resistance and high inductance"
C. high resistance as well as high inductance*
D. low resistance as well as low inductiance)
Q.5: In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to_______________?
A. improve power factor
B. increase overload capacity
C. reduce fluctuations in torque
D. to improve torque
Q.6: If the capacitor of a single-phase motor is short-circuited_________?E
A. the motor will not start
B. the motor will run
C. the motor will run in reverse direction'
D. the motor will run in the same direction at reduced r.p.m9
Q.7: In a split phase motor____________?#
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 switchM
D. centrifugal switch is used to control supply voltage4
Q.8: The rotor developed by a single-phase motor at starting is___________?F
A. more than i.he rated torque
B. rated torque
C. less than the rated torque
D. zero
Q.9: In a shaded pole motor, the shading coil usually consist of___________?G
A. a single turn of heavy wire which is in parallel with running windingE
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 windingD
D. none of the above
Q.10: Which of the following motor will have relatively higher power factor ?G
A. Capacitor run motor
B. Shaded pole motor
C. Capacitor start motor
D. Split phase motor

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