Three Phase Induction motor MCQ

Solve Three 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.

Three Phase Induction motor MCQ


1. Which component will be created out of silicon steel?

A. Bearings

B. Shaft

C. Stator core

D. None of the above


2. The frame of induction motor is usually made of___

A. silicon steel

B. cast iron

C. aluminum

D. bronze


3. The shaft of induction motor is made of___

A. stiff

B. flexible

C. hollow

D. any of the above


4. The shaft of induction motor is made of___

A. high-speed steel

B. stainless steel

C. carbon steel

D. cast iron


5. In induction motor, no-load the slip is generally___

A. less than 1%

B. 1.5%

C. 2%

D. 4%


6. In medium-sized induction motors, slip is around

A. 0.04%

B. 0.4%

C. 4%

D. 14%


7. In squirrel cage induction motors, rotor slots are usually given slight skew to___

A. reduce windage losses

B. reduce eddy currents

C. reduce the accumulation of dirt and dust

D. reduce magnetic hum


8. In case air gap in induction motor is increased___

A. Magnetizing current of the rotor will decrease

B. Power factor will decrease

C. Speed of the motor will increase

D. Windage losses will increase


9. Slip rings are usually made of

A. copper

B. carbon

C. phosphor bronze

D. aluminum


10. A Three-phase 440 V, 50 Hz induction motor has a 4% slip. rotor e.m.f. frequenct will be___

A. 200 Hz

B. 50 Hz

C. 2 Hz

D. 0.2 Hz

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