Question

One side of the iron girdles of bridge are placed on rollers ❓​

Answer 1

Answer:

Iron is a good conductor of heat and expansion takes place when temperature is increased and contracts when temperature is reduced. There must be provision to take care of this expansion and contraction and the same is obtained by having rollers.

Explanation:

Answer 2

Answer:

Iron is a good conductor of heat and expansion takes place when temperature is increased and contracts when temperature is reduced..

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