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

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Building Construction
Rotary drilling

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

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Building Construction
Depth or height of the arch is the

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

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