Polyphase Induction Motors QUESTIONS AND ANSWERS

Electrical Engineering : Polyphase Induction Motors QUESTIONS AND ANSWERS :: part2 : 21 to 25

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

21.Slip of an induction motor is negative when

magnetic field and rotor rotate in opposite direction

rotor speed is less than the syn-chronous speed of the field and are in the same direction

rotor speed is more than the syn-chronous speed of the field and are in the same direction

none of the above

22.In three-phase squirrel-cage induction motors

rotor conductor ends are short-circuited through slip rings

rotor conductors are short-circuited through end rings

rotor conductors are kept open

rotor conductors are connected to insulation

23.If any two phases for an induction motor are interchanged

the motor will run in reverse direction

the motor will run at reduced speed

the motor will not run

the motor will burn

24.DOL starting of induction motors is usually restricted to

low horsepower motors

variable speed motors

high horsepower motors

high speed motors

More Polyphase Induction Motors QUESTIONS AND ANSWERS available in next pages

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Electrical Engineering Questions And Answers :: Polyphase Induction Motors: part2

Polyphase Induction Motors QUESTIONS AND ANSWERS

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