Building Construction
Negative skin friction

Develops due to lowering of ground water
Both (A) and (B)
Neither (A) not (B)
Is a downward drag acting on a pile due to downward movement of the surrounding compressible soil relative to the pile

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Building Construction
Auger boring

Is generally employed in cohesive and other self soils above water table
All of these
Is the most primitive method for making a hole in the ground
Is most economical up-to a depth of 5 meters

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