GARE CE 2022: SOIL MECHANICS

Which one of the following statements is NOT correct?

A soil has dry unit weight of 15.5 kN/m³, specific gravity of 2.65 and degree of saturation of 72%. Considering the unit weight of water as 10 kN/m³, the water content of the soil (in %, round off to two decimal places) is ______.

A footing of size 2 m × 2 m transferring a pressure of 200 kN/m², is placed at a depth of 1.5 m below the ground as shown in the figure (not drawn to the scale). The clay stratum is normally consolidated. The clay has specific gravity of 2.65 and compression index of 0.3

Considering 2:1 (vertical to horizontal) method of load distribution and kN/m³, the primary consolidation settlement (in mm, round off to two decimal places) of the clay stratum is ______.

In a homogeneous unconfined aquifer of area 3.00 km², the water table was at an elevation of 102.00 m. After a natural recharge of volume 0.90 million cubic meter (Mm³), the water table rose to 103.20 m. After this recharge, ground water pumping took place and the water table dropped down to 101.20 m. The volume of ground water pumped after the natural recharge, expressed (in Mm³ and round off to two

Water flows in the upward direction in a tank through 2.5 m thick sand layer as shown in the figure. The void ratio and specific gravity of sand are 0.58 and 2.7, respectively. The sand is fully saturate D . Unit weight of water is 10 kN/m³.

The effective stress (in kPa, round off to two decimal places) at point A, located 1 m above the base of tank, is

A 2.0 m thick soil stratum having natural void ratio of 0.80 and is densified to a relative density of 70%. If the maximum void ratios are 1.20 and 0.50 respectively, then the reduced thickness is ________m.