If Cv is the coefficient of consolidation, t is the time and d is drainage path

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If C_v is the coefficient of consolidation, t is the time and d is drainage path of one dimensional consolidation of soil, the time factor T_v, is given by
Options
A.
B.
C.
D.

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Soil Mechanics and Foundation Engineering problems

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2. A soil mass coated with a thin layer of paraffin weighs 460 g. When immersed, it displaces 299 cc of water. The weight of paraffin is 10 g. If specific gravity of solids is 2.5 and that of paraffin 0.9, the void ratio of soil, is
Options
A. 0.55
B. 0.60
C. 0.65
D. 0.70

3. In a fow net
Options
A. flow lines and equipotential lines cross each other at right angles
B. fields are rectangles whose length is twice the breadth
C. smaller the dimensions of the field, smaller will be the hydraulic gradient and velocity of flow through it
D. for homogeneous soil, the curves are smooth and circular.

4. When the seepage pressure becomes equal to the pressure due to submerged weight of a soil, the effective pressure is reduced to zero and the soil particles have a tendency to move up in the direction of flow. This phenomenon is generally known
Options
A. quick condition
B. boiling condition
C. quick sand
D. all the above.

8. The consistency index of a soil is defined as the ratio of
Options
A. liquid limit plus the natural water content to the plasticity index of the soil
B. liquid limit minus the natural water content to the plasticity index of the soil
C. natural water content of a soil minus plastic limit to the plasticity index of the soil
D. natural water content of a soil plus its plastic limit to the plasticity index of the soil.

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