Building Construction
Pick up the correct statements from the following:

All listed here
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
In brick work, the efflorescence is removed by applying a solution of zinc sulphate and water

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Building Construction
Negative skin friction

Develops due to lowering of ground water
Both (A) and (B)
Neither (A) not (B)
Is a downward drag acting on a pile due to downward movement of the surrounding compressible soil relative to the pile

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