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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Building Construction
During percussion drilling

The soil to a considerable depth below the bottom of the hole gets disturbed
All listed here
Ground water observations are hindered due to entry of the slurry in the soil below the bottom of the hole
Caving or mixing of strata are caused in soft soils or cohesion-less soils

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