Question

Small gaps are left between railway lines because:

• A. rails of very long lengths are not available.
• B. expansion of rails during summer
• C. contraction of rails during summer
• D. both (b) and (c)

Answer 1

The correct option is B

expansion of rails during summer

1. Rails are made up of steel and they will undergo thermal expansion in the summer season.
2. If there is no space between railway lines for accommodating this expansion, then the railway lines will bend outwards and it will lead to the derailment of trains.
3. To avoid derailment of trains due to the thermal expansion of rails, small gaps are left between the railway lines.

Hence option (b) is the correct option.