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Electrical Engineering : Electrical Machine Design QUESTIONS AND ANSWERS :: part2 : 1 to 5
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
1.The resistivity of water should not be less than |
10 Q m |
100 Q m |
1000 Q m |
2000 Q m |
2.Which of the following methods is most accurate ? |
Equivalent current method |
Equivalent power method |
Equivalent torque method |
Method of average losses |
3.The slot leakage can be calculated by making which of the following assumptions ? |
The current in the slot conductors is uniformly distributed over their cross-section |
The leakage path is straight across the slot and around the iron at the bottom |
The permanence of air paths is only considered. The reluctance of iron paths is assumed as zero |
All of the above |
4.The noise produced by a ______ cooled machine is less as the rotor moves in a medium of smaller density. |
air |
hydrogen |
either (a) or (b) |
none of the above |
5.In self cooled motors the cooling time constant is about ______ than the heating time constant because cooling conditions are worse at standstill. |
2 to 3 times greater |
3 to 4 times greater |
4 to 5 times greater |
none of the above |
More Electrical Machine Design QUESTIONS AND ANSWERS available in next pages
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