1. The complete circle diagram of induction motor can be drawn with the help of data found from ? no-load test blocked rotor test stator resistance test all of the above Answer: all of the above Explanation: View Answer Discuss in Forum Report Question

 2. The circle diagram for an induction motor cannot be used to determine ? efficiency power factor frequency output Answer: efficiency Explanation: View Answer Discuss in Forum Report Question

 3. Temperature of the stator winding of a three-phase induction motor is obtained by ? resistance rise method thermometer method embedded temperature method all above methods Answer: all above methods Explanation: View Answer Discuss in Forum Report Question

 4. The torque of an induction motor is ? directly proportional to slip inversely proportional to slip proportional to the square of the slip none of the above Answer: directly proportional to slip Explanation: View Answer Discuss in Forum Report Question

 5. If there is an open circuit in the rotor of a squirrel cage induction motor ? rotor will overheat line fuses will blow motor will be noisy motor will not start Answer: motor will not start Explanation: View Answer Discuss in Forum Report Question

 6. The pull-out torque for a normal squirrel cage induction motor usually occurs at a percentage slip of about ? 10 to 16 per cent 20 to 25 per cent 35 to 46 per cent 50 to 60 per cent Answer: 20 to 25 per cent Explanation: View Answer Discuss in Forum Report Question

 7. ln case of a 3-phase wound rotor induction motor an increase in rotor resistance affects the motor performance in the following way ? the motor efficiency decreases the motor efficiency increases starting current decreases starting current increases Answer: starting current decreases Explanation: View Answer Discuss in Forum Report Question

 8. The difference between the synchronous speed and the actual speed of an induction motor is known as ? lag regulation slip back lash Answer: slip Explanation: View Answer Discuss in Forum Report Question

 9. A wound rotor induction motor can be distinguished from squirrel cage induction motor by ? diameter of shaft size of frame presence of slip ring direction or rotation Answer: presence of slip ring Explanation: View Answer Discuss in Forum Report Question

 10. Which of the following type of bearing is generally used to support the rotor of an induction motor ? Ball bearing Needle bearing Plummer block Bush bearing Answer: Ball bearing Explanation: View Answer Discuss in Forum Report Question