Question

Statement given below is incorrect. Write the correct statement

To avoid derailment of the train, the rails are fixed tightly, leaving no space for expansion or contraction.

Answer 1

1. The rails are made up of steel which expands on heating and contract on cooling.
2. The gaps should be left in rails for expansion and contraction in summer, otherwise, rails will bend outward, which will result in derailment of trains.
3. Hence the correct statement is: To avoid derailment of trains, small gaps should be left in between the rails.