Chapter 6 THREE PHASE AC MOTORS MCQs

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1. . Current is induced in the rotor of three-phase induction motor by _______





2. . The ________ supply is used in induction motor.





3. . The two prominent parts of induction motor are ________ and ________





4. . Frame of induction motor is made of _________





5. . Supply is provided to ________ in order to start an induction motor.





6. . There are generally ________ slip rings on squirrel cage induction motor.





7. . _________ is placed at rotor of wound rotor induction motor.





8. . The three-phase wound rotor induction motor has ________ slip rings.





9. . The direction of rotation of three-phase motor can be reversed by ________





10. . If the two phases are interchanged of a three-phase motor then the motor ________





11. . At starting the motor draws ________ times current of its full load.





12. . If line voltage is 400 V then the phase voltage will be _________





13. . In ________ method, the motor draws more current.





14. . The speed will ________ by reducing the supply frequency.





15. . By increasing the stator poles of induction motor, the speed is ________





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