Single Phase Induction Motor MCQ

Solve Single Phase Induction Motor MCQ ,here given lots of unique mcq for you.It can be very help full for your electrical engineering exam or competitive exams

Single Phase Induction Motor MCQ


1. In a split-phase motor, running winding have___

A. high resistance & low inductance

B. low resistance & high inductance

C. high resistance & high inductance

D. low resistance & low inductance


2. If capacitor of single-phase motor is short-circuited___

A. the motor will not start

B. the motor will run

C. the motor will run in a reverse direction

D. the motor will run in same direction at reduced r.p.m.


3. In capacitor start single-phase motors

A. current in starting winding leads the voltage

B. current in starting winding lags the voltage

C. current in starting winding is in phase with voltage in running winding

D. none of the above


4. In capacitor start and run motors, function of running capacitor in series with auxiliary winding is to___

A. improve power factor

B. increase overload capacity

C. reduce fluctuations in torque

D. to improve torque


5. In a capacitor start the motor, the phase displacement between starting and running winding can be nearly

A. 10°

B. 30°

C. 60°

D. 90°


6. In a split-phase motor

A. the starting winding is connected through centrifugal switch

B. the running winding is connected through centrifugal switch

C. starting and running windings are connected to centrifugal switch

D. centrifugal switch is to control supply voltage


7. The rotor developed by single-phase motor at starting is

A. more than the rated torque

B. rated torque

C. less than the rated torque

D. zero


8. Which motor gives relatively high starting torque?

A. Capacitor start motor

B. Capacitor run motor

C. Split phase motor

D. Shaded pole motor


9. Which of the following motor will have a relatively higher power factor?

A. Capacitor run motor

B. Shaded pole motor

C. Capacitor start motor

D. Split phase motor


10. In shaded pole motor, shading coil usually consist of____

A. single turn in heavy wire which is parallel with running winding

B. single turn of heavy copper wire which is short-circuited and carries

only induced current

C. multilayer fine gauge copper wire in parallel with running winding

D. none of the above

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