Two soil samples  were prepared for the plastic limit test, but later it was found that both samples are not at the plastic limit.

The soil sample which is too wet, crumbles with a thread diameter _______ and the soil sample which is too dry, crumbles with thread diameter_________.

Select the correct response for the two blanks respectively.

Which of the following is true considering dense sand?

The shear box has internal dimensions of 60mm x 60mm. If the shear displacement “x” (the relative horizontal displacement of top and bottom shear box) is 1 mm at failure, what is the effective plan area of the shear box at failure?

Which graph represents the vertical and horizontal-displacement response of loose sand?

If the coefficient of friction µ = 0.3, what is the minimum force required to move that object?

Below you can see the graph of shear stress vs normal stress at failure for a clay sample.

Cohesion of clay is:

Select the incorrect statement considering the strength characteristics of loose sand and sand in a confined space

Consider this schematic diagram of a shear box during the direct shear test. We can calculate the shear stress during the test as:

Which of the following is not true considering loose sand?

A circular footing for an oil tank has a radius (a) of 4m.  The applied stress from the base of the footing to the ground surface (q) is 137 kPa. Determine the vertical stress increment, Δσ_z below the centre of the footing at 2 m below the foundation level.