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Which of the following pairs is matched properly?

a) Class A – Concrete work
b) Class B – Mortar
c) Class C – Masonry work
d) Class D – White washing

Answer: b
Explanation: Based on percentage of CaCO3 in limestone, lime is classified into 3 – Class A, B & C.Class A is used for masonry work, Class C is used for white washing and there is no class D.

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