Building Construction
Pick up the correct statements from the following:

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In brick work, the efflorescence is removed by applying a solution of zinc sulphate and water
Cracks appear on the plastered surface in the form of hair cracks
Excessive thermal variations in the backing or plaster causes the plaster to fall

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Building Construction
In clay soil

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Differential settlement is generally prevalent
Swelling and shrinkage characteristics prevail
Consolidation continues even after several years of construction

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