If the unit weight of sand particles is 2.696 g/cc. and porosity in loose state

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Question
If the unit weight of sand particles is 2.696 g/cc. and porosity in loose state is 44%, the critical hydraulic gradient for quick sand condition, is
Options
A. 0.91
B. 0.92
C. 0.93
D. 0.94
E. 0.95

Correct Answer

0.95

Soil Mechanics and Foundation Engineering problems

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1. Pick up the correct statement from the following:
Options
A. The phenomenon of quicksand generally occurs in the cohesionless soil
B. At critical hydraulic gradient, the saturated sand becomes quick
C. The critical gradient depends on the void ratio and the specific gravity
D. The quick sand occurs more in fine sand and silt than coarse material
E. All the above.

8. Terzaghi's analysis assumes :
Options
A. soil is homogeneous and isotropic
B. elastic zone has straight boundaries inclined at ? = ? to the horizontal and plastic zones fully developed
C. failure zones do not extend above the horizontal plane through the base of the footing
D. all the above.

9. If the coefficients of volume change and compressibility of a soil sample are respectively 6.75 x 10^-2 and 3 x 10^-2, the void ratio of the soil sample, is
Options
A. 1.10
B. 1.15
C. 1.20
D. 1.25
E. 1.30

10. The passive earth pressure of a soil, is proportional to (where ? is the angle of internal friction of the soil.)
Options
A. tan (45� - ?)
B. tan (45� + ?)
C. tan² (45� - ?
D. tan² (45� + ?)

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