Building Construction
In case of multi-storeyed buildings, the forms to be removed first are

Bottom of beams and girders
Column forms
All the above at the same time
Sides of beams and girders

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Building Construction
Depth or height of the arch is the

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

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Building Construction
Rotary drilling

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

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