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Q.

A steel bridge expands in summer. What precautions are taken to ensure this expansion does not damage the bridge?

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a

Two ends are fixed

b

One of its ends is fixed, and the other end is free

c

Two ends are made to rest

d

None of these

answer is C.

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Detailed Solution

To ensure the expansion does not damage the bridge one end of the bridge is kept fixed and other end is free.
A steel bridge expands in the summer due to thermal expansion. So the joints between two bridge slabs are provided with expansion gaps. Also, one end of the bridge is kept fixed while the other is kept on rollers for the bridge's movement. This mechanism makes the thermal expansion of the bridge easy.

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A steel bridge expands in summer. What precautions are taken to ensure this expansion does not damage the bridge?