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Electrical Machine Design - Interview Questions and Answers

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6. The design of mechanical parts is particularly important in case of _____ speed machines.
A. low
B. medium
C. high
D. any of the above
Explanation:
7. If an insulating material is operated beyond the maximum allowable temperature, its life is
A. drastically increased
B. drastically reduced
C. unaffected
D. none of the above
Explanation:
8. The efficiency of a 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
Explanation:
9. The mcrease in heat dissipation by air blasts is due to increase in
A. conduction
B. convection
C. radiation
D. any ofthe above
Explanation:
10. ________ has a lowrelative permeability and is used principally in field frames when cost is of primary importance and extra weight is not objectionable.
A. Cast steel
B. Aluminium
C. Soft steel
D. Cast iron
Explanation:
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