Important Electric Traction Multiple Choice Questions and Answers
26. Maintenance requirements are minimum in case of
A. Electric locomotives
B. Steam locomotives
C. Diesel electric locomotives
D. Diesel engines
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A. Electric locomotives
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27. Low-frequency operation of overhead line in traction system
A. Increases the spacing between substations
B. Reduces the spacing between substations
C. Spacing is independent of frequency of supply
D. All of the above
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28. In kando system of track electrification
A. Single phase AC is converted into DC
B. Single phase AC is converted into three phase AC
C. Three phase AC is converted into DC
D. Three phase AC is converted into single phase AC
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29. The speed time curve for urban service has to
A. Costing period
B. Free running period
C. Breaking period
D. Acceleration period
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30. The suburban services as compared to urban services
A. The costing period is longer
B. The costing period is smaller but free running period is a longer
C. The costing and free running periods are smaller
D. None of the above
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