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Electric Traction - Interview Questions and Answers

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31. Which of the following braking systems is used on steam locomotives ?
A. Hydraulic system
B. Pneumatic system
C. Vacuum system
D. None of the above
Explanation:
32. Co-efficient of adhesion is
A. high in case of D.C. traction than in the case of AC. traction
B. low in case of D.C. traction than in the case of AC. traction
C. equal in both AC. and D.C. traction
D. any of the above
Explanation:
33. Which of the following is the disadvantage of electric traction over other systems of traction ?
A. Corrosion problems in the under-ground pipe work
B. Short time power failure interrupts traffic for hours
C. High capital outlay in fixed instal-lations beside route limitation
D. Interference with communication lines
Explanation:
34. Which of the following braking systems on the locomotives is costly ?
A. Regenerative braking on electric locomotives
B. Vacuum braking on diesel locomo-tives
C. Vacuum braking on steam locomo-tives
D. All braking systems are equally costly
Explanation:
35. The resistance encountered by a trainin motion is on account of
A. resistance offered by air
B. friction at the track
C. friction at various parts of the rolling stock
D. all of the above
Explanation:
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