For a saturated sand deposit, the void ratio and the specific gravity of solids are 0.70 and 2.67, respectively. The critical (upward) hydraulic gradient for the deposit would be

Likelihood of general shear failure for an isolated footing in sand decreases with

The results for sieve analysis carried out for three types of sand, P, Q and R, are given in the adjoining figure. If the fineness modulus values of the three sands are given as FM_P, FM_Q and FM_R, it can be stated that

A soil is composed of solid spherical grains of identical specific gravity and diameter between 0.075 mm and 0.0075 mm. If the terminal velocity of the largest particle falling through water without flocculation is 0.5 mm/s, that for the smallest particle would be

Two geometrically identical isolated footings, X (linear elastic) and Y (rigid), are loaded identically (shown alongside). The soil reactions will

For a sample of dry, cohesionless soil with friction angle ^_$\phi$, the failure plane will be inclined to the major principal plane by an angle equal to

A fine grained soil has liquid limit of 60 and plastic limit of 20. As per the plasticity chart, according to IS classification, the soil is represented by the letter symbols

Quicksand condition occurs when

In a compaction test, G, w, S and e represent the specific gravity, water content, degree of saturation and void ratio of the soil sample respectively. If y_w represents the unit weight of water and y_d represents the dry unit weight of the soil, the equation for zero air voids line is

The e-log p curve shown in the figure is representative of

If ^{$\sigma_h, \sigma_w, \sigma_n$} and ^$\sigma_w$ represent the total horizontal stress, total vertical stress, effective horizontal stress and effective vertical stress on a soil element respectively, the coefficient of earth pressure at rest is given by

A clay soil sample is tested in triaxial apparatus in consolidated-drained conditions at a cell pressure of 100 kN/m². What will be the pore water pressure at a deviator stress of 40 kN/m²?

The number of blows observed in a Standard Penetration Test (SPT) for different penetration depths are given as follows:

The observed N value is

Group symbols assigned to silty sand and clayey sand are respectively

When a retaining wall moves away from the back-fill, the pressure exerted on the wall is termed as

Compaction by vibratory roller is the best method of compaction in case of

Deposit with flocculated structure is formed when

A precast concrete pile is driven with a 50 kN hammer falling through a height of 1.0 m with an efficiency of 0.6. The set value observed is 4 mm per blow and the combined temporary compression of the pile, cushion and the ground is 6 mm. As per Modified Hiley Formula, the ultimate resistance of the pile is

Dilatancy correction is required when a strata is

The relationship among specific yield (S_y), specific retention (S_r) and porosity ($\eta$) of an aquifer is