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Electrical Machine Design - Interview Questions and Answers

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41. D.C. servomotors are used in
A. purely D.C. control systems
B. purely AC. control systems
C. both D.C. and AC. control systems
D. none of the above
Explanation:
42. For 275 kV transformers, using cold rolled grain oriented steel, which of the following values of flux density may be used?
A. 1.0 Wb/m2
B. 1.1 Wb/m2
C. 1.3 Wb/m2
D. 1.6 Wb/m2
Explanation:
43. D.C. windings are
A. sometimes 2-layer type
B. never 2-layer type
C. always 2-layer type
D. none of the above
Explanation:
44. Cylindrical windings using circular conductors, employed in transformers, are
A. single layered
B. double layered
C. multi-layered
D. none of the above
Explanation:
45. Aluminium when adopted as a conductor material in ______ transformers, decreases the overall cost of the transformer
A. small size
B. medium size
C. large size
D. any of the above size
Explanation: