Under-reamed piles are generally driven piles bored piles precast piles all the

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Soil Mechanics and Foundation Engineering problems

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1. A compacted soil sample using 10% moisture content has a weight of 200 g and mass unit weight of 2.0 g/cm³. If the specific gravity of soil particles and water are 2.7 and 1.0, the degree of saturation of the soil is
Options
A. 11.1%
B. 55.6%
C. 69.6%
D. none of these.

2. Back fill with a sloping surface exerts a total active pressure P_a on the wall of height H and acts at
Options
A. H/4 above the base parallel to base
B. H/2 above the base parallel to base
C. H/3 above the base parallel to base
D. H/5 above the base parallel to base.

3. Rankine's theory of active earth pressure assumes
Options
A. soil mass is homogeneous, dry and cohesionless
B. ground surface is a plane which may be horizontal or inclined
C. back of the wall is vertical and smooth
D. wall yields about the base
E. all the above.

6. Pick up the correct statement from the following:
Options
A. When water table is above the base of a footing, the dry weight m should be used for soil below water table
B. When water table is located somewhat below the base of a footing, the elastic wedge is partly of moist soil and partly of submerged soil, and a suitable reduction factor is used
C. When water table is just at the base of the footing, no reduction factor is used
D. None of these.

8. The ratio of the weight of given volume of soil solids to the weight of an equal volume of distilled water at the given temperature, is known
Options
A. porosity
B. specific gravity
C. void ratio
D. water content.

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