GATE Civil Engineering

A 6 m thick clay stratum has drainage at both its top and bottom surface due to the presence of sand strata. The time to complete $50 \%$ consolidation is 2 years. The coefficient...

Which of the following statements is/are INCORRECT?

A clayey soil has a moisture content of $18 \%$, a specific gravity of soil solids of 2.74 , and a degree of saturation of $65 \%$. The soil soaks up water during a rain event, and...

From a flow-net diagram drawn under a concrete dam, following information are obtained: (i) The head difference between upstream and downstream side of the dam is 9 m . (ii) The to...

For a partially saturated soil deposit at a construction site, water content $(w)$ is $15 \%$, degree of saturation ( S ) is $67 \%$, void ratio ( e ) is 0.6 and specific gravity o...

The most suitable test for measuring the permeability of clayey soils in the laboratory is ___________

A designer used plate load test to obtain the value of the bearing capacity factor $\mathrm{N}_\gamma$. A circular plate of 1 m diameter was placed on the surface of a dry sand lay...

In an oedometer apparatus a specimen of fully saturated clay has been consolidated under a vertical pressure of 100 kPa and is at equilibrium state. Immediately on increasing the v...

In the context of shear strength of soil, which of the following statements is/are CORRECT?

A single pile with 450 mm diameter has been driven into a homogeneous clay layer, which has an undrained cohesion ( $\mathrm{c}_{\mathrm{u}}$ ) of 20 kPa and unit weight of $18 \ma...

A 2 m wide strip footing is founded at a depth of 1.5 m below the ground level in a homogeneous pure clay bed. The clay bed has unit cohesion of 40 kPa. Due to seasonal fluctuation...

Consider the statements P and Q. P: Soil particles formed by mechanical weathering, and close to their origin are generally subrounded. Q: Activity of the clay physically signifies...

An embankment is constructed with soil by maintaining the degree of saturation as 75% during compaction. The specific gravity of soil is 2.68 and the moisture content is 17% during...

A vertical smooth rigid retaining wall is supporting horizontal ground with dry cohesionless backfill having a friction angle of 30°. The inclinations of failure planes with respec...

Which of the following statement(s) is/are CORRECT?

The total primary consolidation settlement ($S_c$) of a building constructed on a 10 m thick saturated clay layer is estimated to be 50 mm. After 300 days of the construction of th...

An infinite slope is made up of cohesionless soil with seepage parallel to and up to the sloping surface. The angle of slope is 30° with respect to the horizontal ground surface. T...

A soil sample was consolidated at a cell pressure of 20 kPa and a back pressure of 10 kPa for 24 hours during a consolidated undrained (CU) triaxial test. The cell pressure was inc...

Which one of the following saturated fine-grained soils can attain a negative Skempton’s pore pressure coefficient (A)?

A reinforced concrete pile of 10 m length and 0.7 m diameter is embedded in a saturated pure clay with unit cohesion of 50 kPa. If the adhesion factor is 0.5, the net ultimate upli...

Consider the statements P and Q related to the analysis/design of retaining walls. P : When a rough retaining wall moves toward the backfill, the wall friction force/resistance mob...

Consider the statements P, Q, and R. P: Compacted fine-grained soils with flocculated structure have isotropic permeability. Q: Phreatic surface/line is the line along which the po...

A homogeneous earth dam has a maximum water head difference of 15 m between the upstream and downstream sides. A flownet was drawn with the number of potential drops as 10 and the...

The in-situ percentage of voids of a sand deposit is 50%. The maximum and minimum densities of sand determined from the laboratory tests are 1.8 g/cm 3 and 1.3 g/cm 3 , respectivel...

A drained triaxial test was conducted on a saturated sand specimen using a stress-path triaxial testing system. The specimen failed when the axial stress reached a value of 100 kN/...

The specific gravity of a soil is 2.60. The soil is at 50% degree of saturation with a water content of 15%. The void ratio of the soil is _______.

A group of 9 friction piles are arranged in a square grid maintaining equal spacing in all directions. Each pile is of diameter 300 mm and length 7 m. Assume that the soil is cohes...

A drained direct shear test was carried out on a sandy soil. Under a normal stress of 50 kPa, the test specimen failed at a shear stress of 35 kPa. The angle of internal friction o...

With reference to the compaction test conducted on soils, which of the following is INCORRECT?

Consider that a force P is acting on the surface of a half-space (Boussinesq’s problem). The expression for the vertical stress ( σ z ) at any point (r, z), within the half-space i...

A square footing of size 2.5 m × 2.5 m is placed 1.0 m below the ground surface on a cohesionless homogeneous soil stratum. Considering that the groundwater table is located at the...

A soil having the average properties, bulk unit weight = 19 kN/m 3 ; angle of internal friction = 25° and cohesion = 15 kPa, is being formed on a rock slope existing at an inclinat...

A vertical trench is excavated in a clayey soil deposit having a surcharge load of 30 kPa. A fluid of unit weight 12 kN/m 3 is poured in the trench to prevent collapse as the excav...

A standard penetration test (SPT) was carried out at a location by using a manually operated hammer dropping system with 50% efficiency. The recorded SPT value at a particular dept...

A vertical sheet pile wall is installed in an anisotropic soil having coefficient of horizontal permeability, 𝑘 𝐻 and coefficient of vertical permeability, 𝑘 𝑉 . In order to dr...

The reason(s) of the nonuniform elastic settlement profile below a flexible footing, resting on a cohesionless soil while subjected to uniform loading, is/are:

An unconfined compression strength test was conducted on a cohesive soil. The test specimen failed at an axial stress of 76 kPa. The undrained cohesion (in kPa, in integer) of the...

A square footing is to be designed to carry a column load of 500 kN which is resting on a soil stratum having the following average properties: bulk unit weight = 19 kN/m 3 ; angle...

A circular pile of diameter 0.6 m and length 8 m was constructed in a cohesive soil stratum having the following properties: bulk unit weight = 19 kN/m 3 ; angle of internal fricti...

A consolidated drained (CD) triaxial test was carried out on a sand sample with the known effective shear strength parameters, 𝑐′ = 0 and 𝜙′ = 30°. In the test, prior to the fail...

Four different soils are classified as CH, ML, SP, and SW, as per the Unified Soil Classification System. Which one of the following options correctly represents their arrangement...

Let $$\sigma$$' v and $$\sigma$$' h denote the effective vertical stress and effective horizontal stress, respectively. Which one of the following conditions must be satisfied for...

Let $$\psi $$ represent soil suction head and K represent hydraulic conductivity of the soil. If the soil moisture content $$\theta$$ increases, which one of the following statemen...

An uncompacted heap of soil has a volume of 10000 m 3 and void ratio of 1. If the soil is compacted to a volume of 7500 m 3 , then the corresponding void ratio of the compacted soi...

A concentrated vertical load of 3000 kN is applied on a horizontal ground surface. Points P and Q are at depths 1 m and 2 m below the ground, respectively, along the line of applic...

At a site, Static Cone Penetration Test was carried out. The measured point (tip) resistance q c was 1000 kPa at a certain depth. The friction ratio (f r ) was estimated as 1% at t...

The correct match between the physical states of the soils given in Group-I and the governing conditions given in Group-II is Group-I Group-II 1. normally consolidated soil. P. sen...

As per Rankine's theory of earth pressure, the inclination of failure planes is $$\left( {45 + {\phi \over 2}} \right)^\circ $$ with respect to the direction of the minor principal...

A square concrete pile of 10 m length is driven into a deep layer of uniform homogenous clay. Average unconfined compressive strength of the clay, determined through laboratory tes...

A raft foundation of 30 m $$\times$$ 25 m is proposed to be constructed at a depth of 8 m in a sand layer. A 25 m thick saturated clay layer exists 2 m below the base of the raft f...

Match the following in Column X with Column Y : Column X Column Y P. In a triaxial compression test, with increase of axial strain in loose sand under drained shear condition. The...

A concentrically loaded isolated square footing of size 2 m $$\times$$ 2 m carries a concentrated vertical load of 1000 kN. Considering Boussinesq's theory of stress distribution,...

Read the following statements : (P) While designing a shallow footing in sandy soil, monsoon season is considered for critical design in terms of bearing capacity. (Q) For slope st...

The inside diameter of a sampler tube is 50 mm. The inside diameter of the cutting edge is kept such that the Inside Clearance Ratio (ICR) is 1.0% to minimize the friction on the s...

A group of total 16 piles are arranged in a square grid format. The center-to-center spacing (s) between adjacent piles is 3 m. The diameter (d) and length of embedment of each pil...

In a triaxial unconsolidated undrained (UU) test on a saturated clay sample, the cell pressure was 100 kPa. If the deviatoric stress at failure was 150 kPa, then the undrained shea...

The porosity (n) and the degree of saturation (S) of a soil sample are 0.7 and 40%, respectively. In a 100 $$m^3$$ volume of the soil, the volume (expressed in $$m^3$$) of air is _...

If the water content of a fully saturated soil mass is 100%, the void ratio of the sample is

A 588 $$cm^3$$ volume of moist sand weighs 1010 gm. Its dry weight is 918 gm and specific gravity of solids, G is 2.67. Assuming density of water as 1 gm/$$cm^3$$, the void ratio i...

A certain soil has the following properties: G s = 2.71, n = 40% and w = 20%. The degree of saturation of the soil (rounded off to the nearest percent) is _________

In its natural condition, a soil sample has a mass of 1.980 kg and a volume of 0.001 m 3 . After being completely dried in an oven, the mass of the sample is 1.800 kg. Specific gra...

The water content of a saturated soil and the specific gravity of soil solids were found to be 30% and 2.70, respectively. Assuming the unit weight of water to be 10 $$kN /m^3$$, t...

The ratio of saturated unit weight to dry unit weight of a soil is 1.25. If the specific gravity of solids (G s ) is 2.65, the void ratio of the soil is

A soil sample has a void ratio of 0.5 and its porosity will be closed to

A borrow pit soil has a dry density of 17 kN/m 3 . How many cubic meters of this soils will be required to construct an embankment of 100 m 3 volume with a dry density of 16 kN/m 3...

Principle involved in the relationship between submerged unit weight and saturated weight of a soil is based on

If the porosity of a soil sample is 20%, the void ratio is

Which one of the following relations is not correct?

Aeolian Soils are

The void ratio of a soil sample can exceed unity.

The void ratio of a soil sample is 1. The corresponding porosity of the sample is _______.

When the product of rock weathering is not transported as sediment but remains in place, is called

For sand of uniform spherical particles, the void ratio in the loosest and the densest states are ________ and ________ respectively.

A saturated sand sample has dry unit weight of 18 $$kN/m^3$$ and a specific gravity of 2.65. If $$\gamma_w$$ = 10 $$kN/m^3$$, the water content of the soil is _____%.