# Electrical Engineering Questions And Answers :: Single Phase Induction Motors: part1

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Electrical Engineering : Single Phase Induction Motors QUESTIONS AND ANSWERS :: part1 : 21 to 25

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2021 and IES 2021 examinations :

 21.In a shaded pole motor, the shading coil usually consist of a single turn of heavy wire which is in parallel with running winding a single turn of heavy copper wire which is short-circuited and carries only induced current a multilayer fine gauge copper wire in parallel with running winding none of the above ANSWER : : a single turn of heavy copper wire which is short-circuited and carries only induced current Explanation :
 22.The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be at the end connections at the end terminals anywhere on the winding inside a slot at the slot edge where coil enters or comes out of the slot ANSWER : : at the slot edge where coil enters or comes out of the slot Explanation :
 23.A centrifugal switch is used to dis- connect 'starting winding when motor has run for about 1 minute run for about 5 minutes picked up about 50 to 70 per cent of rated speed picked up about 10 to 25 per cent of rated speed ANSWER : : picked up about 50 to 70 per cent of rated speed Explanation :
 24.In a capacitor start motor, the phase displacement between starting and running winding can be nearly 10� 30� 60� 90� ANSWER : : 90� Explanation :
 25.In a capacitor start single-phase motor, when capacitor is replaced by a resistance torque will increase the motor will consume less power motor will run in reverse direction motor will continue to run in same direction ANSWER : : motor will continue to run in same direction Explanation :

More Single Phase Induction Motors QUESTIONS AND ANSWERS available in next pages

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