Building Construction
Depth or height of the arch is the

None of these
Perpendicular distance between springing line and extrados
Vertical distance between springing line and intrados
Perpendicular distance between intrados and extrados

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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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