1. When consolidation of a saturated soil sample occurs, the degree of saturation A.Increases B.Decreases C.Remains constant D.May increase or decrease 2. The process opposite to consolidation is called swelling, which involves an increase in the volume of the voids due to the water content A.Decreasing B.Increasing C.Equalize D. None of the above 3. OC: is refer to A. An over consolidation ratio as the ratio of the preconsolidation pressure to the present vertical effective stress. (B. A normally consolidated clay is defined as a clay that has a present (in situ) vertical effective stress oo' equal to its preconsolidation pressure oc C. An overconsolidated clay is defined as a clay that has a present vertical effective stress of less than its preconsolidation pressure D. None of the above Сс 4. Coefficient of consolidation of a soil is affected by A.Compressibility B.Permeability C.Both compressibility and permeability D.None of the above 5. The shear strength of a soil A Is directly proportional to the angle of internal friction of the soil B. Is inversely proportional to the angle of internal friction of the soil C. Decreases with increase in normal stress D. Decreases with decrease in normal stress 6. The porewater pressure due to capillarity is ANegative B.Positive C.Negative and positive D. None of the above

3. A 405 cm³ volume of fully saturated clay weights 8.1 N and the specific gravity of the solids is 2.70. Given the liquid limit and the plastic limit of the clay are LL (w₁) = 40% and PL (wp )= 10.5%, respectively. (1) Find the plasticity index PI of the clay. (2) What is the liquidity index of the clay? (3) Do you expect a brittle type of failure of this soil? Why?

The layer is subjected to a uniform vertical stress increase of 100 kPa. The singly-drained clay layer has a coefficient of consolidation of  20 ft2 /yr. Determine the value of the excess pore pressure at point A 2 years after the application of the load. Also given is the chart giving the local degree of consolidation. a)4.4 kPa b)44 kPa c)88 kPa d)96 kPa

If the sensitivity of a clay is four and it's undisturbed strength is 300 units, the dis- turbed strength of that clay will be:

The coefficient of earth pressure at rest for a sand having the Poisson's ratio value of 0.25 is. ?

Note) For soil sample in Table 2, initial thickness of sample = 14.31 mm, sample area = 2827.433 mm^2, dry weight measured at the end of test = 52.53 g, specific gravity = 2.7 Also, Determine the compression index and expansion index Please show graph

A stratum of sand and a stratum of clay have the same thickness of 3 m. The coefficient of compressibility of sand is one fifth of coefficient of compressibility of clay and the permeability of sand is 10,000 times that of the clay. Assuming the same initial void ratio the ratio of the consolidation time for the clay to that of the sand for same degree of consolidation is