Electrical Engineering Questions And Answers :: Polyphase Induction Motors: part1

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Electrical Engineering : Polyphase Induction Motors QUESTIONS AND ANSWERS :: part1 : 16 to 20

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

16.The shaft of an induction motor is made of

stiff
flexible
hollow
any of the above

17.The starting torque of a squirrel-cage induction motor is

low
negligible
same as full-load torque
slightly more than full-load torque

18.The good power factor of an induction motor can be achieved if the average flux density in the air gap is

absent
small
large
infinity

19.In medium sized induction motors, the slip is generally around

0.04%
0.4%
4%
14%

20.In Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be

Ns
s.N,
(l-s)Ns
(Ns-l)s

More Polyphase Induction Motors QUESTIONS AND ANSWERS available in next pages

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