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In order to reduce temperature stress ______________ joints are provided.

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in Environmental Engineering by (81.4k points)
In order to reduce temperature stress ______________ joints are provided.

(a) Contraction

(b) Expansion

(c) Bell and spigot

(d) Collar

I have been asked this question in an internship interview.

This is a very interesting question from Forces and Loads on Sewer topic in chapter Construction of Sewers, Sewer Appurtenances and Sewage Pumping of Environmental Engineering

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Correct choice is (b) Expansion

The best I can explain: In order to reduce temperature stress, expansion joints are provided at intervals of 20m to 30m.

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