Building Construction
The type of pointing in which a V-shaped projection outside the wall surface, is provided, is called

Tuck pointing
Weather pointing
Recessed pointing
V-pointing

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Building Construction
During percussion drilling

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

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