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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