Question

Bridges are kept on rollers to allow for contraction in summer and expansion in winter. (True or false )​

Answer 1

Answer:

True

Explanation:

Bridges are made up of metals and metals have property of expanding in winters and contracting in summer

Answer 2

Answer:

bridges are made up of metals. and metals have property to expand in summers and contract in winters. so their expansion and contraction can cause cracks and ultimately breakage in the bridges so to overcome the loss, rollers are used that give strength to the bridge during their expansion and contraction