Related Mcqs:

1. Clay layer A with single drainage and coefficient of consolidation Cv takes 6 months to achieve 50% consolidation. The time taken by clay layer B of the same thickness with double drainage and coefficient of consolidation Cv/2 to achieve the same degree of consolidation is_________________?

   A. 3 months
   B. 6 months
   C. 12 months
   D. 24 months

2. A normally consolidated clay settled 10 mm when effective stress was increased from 100 kN/m2 to 200 kN/ m2. If the effective stress is further increased from 200 kN/ m2 to 400 kN/ m2, then the settlement of the same clay is__________________?

   A. 10 mm
   B. 20 mm
   C. 40 mm
   D. none of the above

3. The clay mineral with the largest swelling and shrinkage characteristics is_______________?

   A. kaolinite
   B. illite
   C. montmorillonite
   D. none of the above

4. The admixture of coarser particles like sand or silt to clay causes______________?

   A. decrease in liquid limit and increase in plasticity index
   B. decrease in liquid limit and no change in plasticity index
   C. decrease in both liquid limit and plasticity index
   D. increase in both liquid limit and plasticity index

5. In a consolidated drained test on a normally consolidated clay, the volume of the soil sample during shear________________?

   A. decreases
   B. increases
   C. remains unchanged
   D. first increases and then decreases

6. A soil has a bulk density of 22 kN/m3 and water content 10 %. The dry density of soil is_______________?

   A. 18.6 kN/m3
   B. 20.0 kN/m3
   C. 22.0 kN/m3
   D. 23.2 kN/m3

7. If the permeability of a soil is 0.8 mm/sec, the type of soil is_______________?

   A. gravel
   B. sand
   C. silt
   D. clay

8. Coefficient of compressibility is_______________?

   A. constant for any type of soil
   B. different for different types of soils and also different for a soil under different states of consolidation
   C. different for different types of soils but same for a soil under different states of consolidation
   D. independent of type of soil but depends on the stress history of soil

9. Rankine’s theory of earth pressure assumes that the back of the wall is_______________?

   A. plane and smooth
   B. plane and rough
   C. vertical and smooth
   D. vertical and rough

10. A 600 mm square bearing plate settles by 15 mm in plate load test on a cohesionless soil under an intensity of loading of 0.2 N/ram2. The settlement of a prototype shallow footing 1 m square under the same intensity of loading is_______________?

    A. 15 mm
    B. between 15 mm and 25 mm
    C. 25 mm
    D. greater than 25 mm