in your own words explain with a diagram how the plroblem of expantion is overcome in railway lines
Answers
Answer:
Railroads deal with thermal expansion by heating the rail prior to installation. Therefore, the rail is heated to its rail neutral temperature, being heated, then cooled as the rail is laid.
Explanation:
The stressing process involves either heating the rails, causing them to expand, or stretching the rails with hydraulic equipment. They are then fastened (clipped) to the sleepers in their expanded form. This process ensures that the rail will not expand much further in subsequent hot weather.The gap is left between the rails to provide a space for the iron metal to expand and contract during the summer and winter season due to the change in the temperatures. If the gap is not left in between then the rails will bend more and cause derailing of the trains.