Question

Railway tracks have gaps between them to deal with expansion in :

• A. hot days
• B. cold days
• C. snow fall
• D. none of these

Answer 1

The correct option is A hot days

Solids have the property of expansion or contraction with change in their temperature. However, this change in size of solids is small but it plays an important role. For example, during hot days, railways tracks expands and if there is no gap between railways lives then train can derail and endanger passengers.

Hence, the answer is hot days.