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Electrical Machine Design - Interview Questions and Answers

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31. Direct water cooling of rotor winding presents
A. no mechanical difficulties
B. lesser mechanical difficulties
C. greater mechanical difficulties
D. none of the above
Explanation:
32. Machines cooled by direct cooling method may be called
A. "supercharged"
B. "inner cooled"
C. "conductor cooled"
D. any of the above
Explanation:
33. The thermal conductivity of hydrogen is ______ times that of air
A. 2
B. 3
C. 5
D. 7
Explanation:
34. The action of electromagnetic machines can be related to which ofthe following basic principles ?
A. Induction
B. Interaction
C. Alignment
D. All of the above
Explanation:
35. Which of the following is the commonly used type of electromagnets ?
A. Flat-faced armature type
B. Horse shoe type
C. Flat-faced plunger type
D. All of the above
Explanation:
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