Building Construction
Pick up the correct statements from the following:

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
All listed here
Cracks appear on the plastered surface in the form of hair cracks

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Building Construction
Which one of the following activities is not correct as applicable to brick corbels

Stretcher bond is generally used for the construction of brick corbel
The maximum projection of each corbel course should be limited to a quarter brick at a time
The discontinuous corbels are used to carry heavy concentrated loads
The maximum projection of the corbel should not be more than the thickness of the wall

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