Building Construction
Pick up the correct statements from the following:

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

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Building Construction
Which one of the following factors is considered for the orientation of buildings?

The extent up to which the sunrays penetrate with the verandah
All listed here
The exposure of the walls and roof of the buildings to the rays of sun
The direction of the prevailing winds in the area

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