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UPSC Civil Service Exam Questions

Q1:

Why is lime added to cement slurry for the topcoat of plastering ?

A To improve the strength of plaster

B To stiffen the plaster

C To smoothen the plaster for ease of spread

D To make the plaster non-shrinkable

ANS:A - To improve the strength of plaster

Lime impart plasticity and improve the workability of concrete.

So, option C is correct.



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