Water is flowing through the permeability apparatus as shown in the figure. The coefficient of permeability of the soil is k m/s and the porosity of the soil sample is 0.50.

The total head, elevation head and pressure head in metres of water at the point R shown in the figure are respectively

Water is flowing through the permeability apparatus as shown in the figure. The coefficient of permeability of the soil is km/s and the porosity of the soil sample is 0.50.

What are the discharge velocity and seepage velocity through the soil sample?

The ground conditions at a site are as shown in the figure. The water table at the site which was initially at a depth of 5 m below the ground level got permanently lowered to a depth of 15 m below the ground level due to pumping of water over a few years. Assume the following data: i. unit weight of water = 10 kN/m³ ii. unit weight of sand above water table = 8 kN/m³ iii. unit weight of sand and clay below the water table = 20 kN/m³ iv. coefficient of volume compressibility = 0.25 m²/MN

What is the compression of the clay layer in mm due to the lowering of the water table?

The ground conditions at a site are as shown in the figure. The water table at the site which was initially at a depth of 5 m below the ground level got permanently lowered to a depth of 15 m below the ground level due to pumping of water over a few years. Assume the following data i. unit weight of water = 10 kN/m³ ii. unit weight of sand above water table = 8 kN/m³ iii. unit weight of sand and clay below the water table = 20 kN/m³ iv. coefficient of volume compressibility = 0.25 m²/MN

What is the change in the effective stress in kN/m² at mid-depth of the clay layer due to the lowering of the water table?

The unit volume of a mass of saturated soil is subjected to horizontal seepage. The saturated unit weight is 22 kN/m³ and the hydraulic gradient is 0.3. The resultant body force on the soil mass is

In an undrained triaxial test on a saturated clay, the Poisson’s ratio is

The ratio of saturated unit weight to dry unit weight of dry unit weight is 1.25. If the specific gravity of solids (G_s) is 2.56, the void ratio of the soil is

Two circular footings of diameters D₁ and D₂ are resting on the surface of the same purely cohesive soil. The ratio of their gross ultimate bearing capacities is

A 10 m thick clay layer is underlain by a sand layer of 20 m depth (see figure below). The water table is 5 m below the surface of the clay layer. The soil above the water table is capillary saturated. The value of g_sat is 19 kN/m³. The unit weight of water is g_w. If now the water table rises to the surface, the effective stress at a point P on the interface will

A masonry dam is found on previous sand having porosity equal to 45% and specific gravity of sand particles is 2.65. For a desired factor of safety of 3 against sand boiling, the maximum permissible upward gradient will be

Water is pumped from a well tapping an unconfined aquifer at a certain discharge rate and the steady state drawdown (X) in an observation well is monitored. Subsequently, the pumping discharge is doubled and the steady state drawdown in the same observation well is found to be more than double (i.e. more than 2X). This disproportionate drawdown is caused by

A double draining clay layer, 6 m thick, settles by 30 mm in three years under the influence of a certain loads. Its final consolidation settlement has been estimated to be 120 mm. If a thin layer of sand having negligible thickness is introduced at a depth of 1.5 m below the top surface, the final consolidation settlement of clay layer will be

A 25 kN point load acts on the surface of an infinite elastic medium. The vertical pressure intensity in kN/m² at a point 6.0 m below and 4.0 m away from the load will be

In a plate load test conducted on cohesionless soil, a 600 mm square test plate settles by 15 mm under a load intensity of 0.2 N/mm². All conditions remaining the same, settlement of a 1 m square footing will be

A granular soil possesses saturated density of 20 kN/m³. Its effective angle friction is 35 degrees. If the desired factor of safety is 1.5, the safe angle of slope for this soil, when seepage occurs at and parallel to the surface, will be

A clayey soil has a maximum dry density of 16 kN/m³ and optimum moisture content of 12%. A contractor during the construction of core of an earth dam obtained the dry density 15.2 kN/m³ and water content 11%. This construction is acceptable because.

Which of the following statement is NOT true in the context of capillary pressure in soils ?

Root time method is used to determine

There are two footings resting on the ground surface. One footing is square of dimension 'B'. The other is strip footing of width 'B'. Both of them are subjected to a loading intensity of q. The pressure intensity at any depth below the base of the footing along the centerline would be

Negative skin friction in a soil is considered when the pile is constructed through a