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Electrical Machine Design - Interview Questions and Answers

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36. In direct cooled system using hydrogen both stator and rotor conductors are made
A. solid
B. hollow
C. perforated
D. any ofthe above
Explanation:
37. When the two coil sides forming a coil are spaced exactly one pole pitch apart they are said to be of
A. short pitch
B. full pitch
C. either of the above
D. none of the above
Explanation:
38. Which of the following methods does not take into account the maximum temperature rise under variable load conditions ?
A. Equivalent power method
B. Equivalent current method
C. Method of average losses
D. Equivalent torque method
Explanation:
39. Transformers with a capacity of upto _____ have a cooling radiator system with natural cooling
A. 2 MVA
B. 5 MVA
C. 7.5 MVA
D. 10 MVA
Explanation:
40. The forced oil and air circulation method is usual one for transformers of capacities
A. upto 5 MVA
B. upto 10 MVA
C. upto 20 MVA
D. 30 MVA upwards
Explanation:
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