Related Questions

A raft foundation is provided if its area exceeds the plan area of the building by
A 10%
B 20%
C 40%
D 50%
The raft slab is projected beyond the outer walls of the structure by
A 5 to 10 cm
B 15 to 20 cm
C 25 to 30 cm
D 30 to 45 cm
The loose pockets in soil mass can be bridged safely by providing a raft foundation provided the soft area is smaller than
A The column spacing
B One-third the column spacing
C Half the column spacing
D Three-fourth the column spacing
Raft foundation are generally preferred to when the area required for individual footing, is more than
A 25% to total area
B 30% of total area
C 40% to total area
D 50% of total area
The maximum total settlement for raft foundation on clayey soils should be limited to
A 25 mm
B 25 to 40 mm
C 40 to 65 mm
D 65 to 100 mm
Pile foundations are suitable for
A Water logged soils
B Soft rocks
C Compact soils
D Multi-storeyed buildings
If the foundations of all the columns of a structure are designed on the total live and dead load basis, then
A There will be no settlement of columns
B There will be no differential settlement
C The settlement of exterior columns will be more than interior columns
D The settlement of interior columns will be more than exterior columns
The foundations are placed below ground level, to increase
A Strength
B Workability
C Stability of structure
D All the above
According to Rankine's formula, minimum depth of foundations, is
A $$\frac{{\text{P}}}{{\text{w}}} \times {\left( {\frac{{1 + \sin \varphi }}{{1 - \sin \varphi }}} \right)^2}$$
B $$\frac{{\text{P}}}{{\text{w}}} \times {\left( {\frac{{1 - \sin \varphi }}{{1 + \sin \varphi }}} \right)^2}$$
C $$\frac{{\text{P}}}{{2{\text{w}}}} \times {\left( {\frac{{1 - \sin \varphi }}{{1 + \sin \varphi }}} \right)^2}$$
D $$\frac{{\text{P}}}{{\text{w}}} \times \frac{{1 + \sin \varphi }}{{1 - \sin \varphi }}$$
In grillage foundations, distance between flanges of grillage beams, is kept
A 40 cm
B Equal to flange width
C Twice the flange width
D Maximum of (A), (B) and (C)

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