GATE CE 2021: Soil Mechanics & Foundation Engineering#7 (App update required to attempt this test)

The natural void ratio of a saturated clay strata, 3 m thick is 0.9. The final void ratio of clay at the end of consolidation is expected to be 0.71. The total consolidation settlement of clay strata is

For a certain loading condition, a saturated clay layer undergoes 40% consolidation in a period 178 days. What would be the additional time
required for further 20% consolidation to occur?

A soil sample has a compression index of 0.4. The void ratio at a stress of 1.5 kg/cm² is 0.6. The value of void ratio (if stress is increased to 3 kg/ cm²) and the settlement of a soil stratum 5m thick are respectively

A homogeneous clay layer 8 m thick is expected to have an ultimate settlement of 332mm. After a time span of 3 years, the average settlement was measured to be 199.2mm. For an average settlement of 237mm, the excess time required is _____________ years.

The compression curve (void ratio, e vs. effective stress, for a certain clayey soil is a straight line in a semi-logarithmic plot and it passes through the points and The compression index (up to two decimal places) of the soil is ___________

A layer of soft saturated clay is 6 m thick and lies under a newly constructed building. The initial effective stress at the centre clay layer is 260 kN/m²  and the weight of sand overlying the clayey layer produces a pressure of 100 kN/m² at the centre of clay layer. If the compression index is 0.5, then the settlement is ________cm.
[Take water content = 40% and specific gravity of grains = 2.65]