Electrical Engineering : Polyphase Induction Motors QUESTIONS AND ANSWERS :: part4 : 1 to 5
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
1.The purpose of using short-circuit gear is |
| to short circuit the rotor at slip rings |
| to short circuit the starting resis�tances in the starter |
| to short circuit the stator phase of motor to form star |
| none of the above |
2.Insertion of resistance in the rotcir of an induction motor to develop a given torque |
| decreases the rotor current |
| increases the rotor current |
| rotor current becomes zero |
| rotor current rernains same |
3.Insertion of resistance in the stator of an induction motor |
| increases the load torque |
| decreases the starting torque |
| increases the starting torque |
| none of the above |
4.The rotor of an induction motor runs at |
| synchronous speed |
| below synchronous speed |
| above synchronous speed |
| any of the above |
5.The low power factor of induction motor is due to |
| rotor leakage reactance |
| stator reactance |
| the reactive lagging magnetizing current necessary to generate the magnetic flux |
| all of the above |
More Polyphase Induction Motors QUESTIONS AND ANSWERS available in next pages
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