Skempton’s pore pressure coefficient B for saturated soil is________________?

Related Mcqs:

1. During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm2 to 0.26 N/mm2, the pore water pressure increases from 0.07 N/mm2 to 0.15 “N/mm2. Skempton’s pore pressure parameter B is___________________?

   A. 0.5
   B. -0.5
   C. 2.0
   D. – 2.0

2. If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is________________?

   A. less than specific gravity of soil
   B. equal to specific gravity of soil
   C. greater than specific gravity of soil
   D. independent of specific gravity of soil

3. If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is______________?

   A. 40%
   B. 60%
   C. 80%
   D. 100%

4. A cylindrical specimen of saturated soil failed under an axial vertical stress of 100kN/m2 when it was laterally unconfmed. The failure plane was inclined to the horizontal plane at an angle of 45°. The values of cohesion and angle of internal friction for the soil are respectively______________________?

   A. 0.5 N/mm2 and 30°
   B. 0.05 N/mm2 and 0°
   C. 0.2 N/mm2 and 0°
   D. 0.05 N/mm2 and 45°

5. A fully saturated soil is said to be________________?

   A. one phase system
   B. two phase system with soil and air
   C. two phase system with soil and water
   D. three phase system

6. 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

7. The flownet for an earthen dam with 30 m water depth consists of 25 potential drops and 5 flow channels. The coefficient of permeability of dam material is 0.03 mm/sec. The discharge per meter length of dam is________________?

   A. 0.00018 nrVsec
   B. 0.0045 m3/sec
   C. 0.18m3/sec
   D. 0.1125m3/sec

8. Uniformity coefficient of a soil is__________________?

   A. always less than 1
   B. always equal to 1
   C. equal to or less than 1
   D. equal to or gi eater than 1

9. Coefficient of consolidation of a soil is affected by_______________?

   A. compressibility
   B. permeability
   C. both compressibility and permeability
   D. none of the above

10. The coefficient of active earth pressure for a loose sand having an angle of internal friction of 30° is___________________?

    A. 1/3
    B. 3
    C. 1
    D. 1/2