Building Construction
To ensure that supporting area of an offset footing of a boundary wall is fully compressive, the C.G. of load must act

Within the middle fifth of the base
Within the middle third of the base
At the centre of the base
Neither (A), (B) nor (C)

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Building Construction
During percussion drilling

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

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