Q
In a railway track, two rails are joined end to end with a gap tin between them because?
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A
A. Steel can be saved
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B
B. Accidents due to contraction in winter can be avoided
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C
C. Air gaps are necessary for bearing the weight of running train
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D
D. Accidents due to expansion in summer can be avoided
Correct Answer:
D. D. Accidents due to expansion in summer can be avoided
