Building Construction
Rotary drilling

Is not suitable for deposits containing very coarse gravel
Hinders the ground water observations and permeability test
All listed here
Is not economical for holes of less than 10 cm

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

The direction of the prevailing winds in the area
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

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