Important Electrical Machine Design Multiple Choice Questions and Answers
16. The efficiency of the machine should be as............. as possible to reduce the operating cost
A.High
B. Low
C. Either of the above
D. None of the above
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A. High
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17. Hot rolled sheets have........value of permeability.
A. Zero
B. Low
C.High
D. None of the above
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18. If an insulating material is operated beyond the maximum operated temperature it's life is
A. Drastically increased
B. Drastically reduced
C. Unaffected
D. None of the above
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19. The heat dissipated by ........from a surface depends upon its temperature and its characteristics like colour,roughness etc.
A. Conduction
B. Convection
C. Radiation
D. Any of the above
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20. CROS cannot be used in ........rotating machines
A. Small
B. Medium
C. Large
D. Any
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