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 factors is considered for the orientation of buildings?

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

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