In a railway track, two rails are joined end to end with a gap tin between them because?
Correct answer: D. Accidents due to expansion in summer can be avoided
- A. Steel can be saved
- B. Accidents due to contraction in winter can be avoided
- C. Air gaps are necessary for bearing the weight of running train
- D. Accidents due to expansion in summer can be avoided
- E. All of these
Explanation
Steel rails expand when heated in summer. The gaps provide room for this expansion and prevent the rails from bending or buckling.
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