soil mechanics

The name of a person in Column 1 is to be matched with the test mentioned in Column 2. Column 1 (I) Menard (II) Marchetti (III) Casagrande (IV) Proctor Column 2 (P) Dilatometer tes...

Information related to foundation design is provided in table below. Column 1 (I) Converse-Labarre formula (II) Hiley formula (III) Newmark's influence chart (IV) Skempton's equati...

For a liquid, the permeability of a sandy soil having a void ratio of 0.60 was determined as 0.14 cm/s. Considering the same liquid and by using Taylor's equation, the permeability...

A fully saturated sandy soil deposit has water content 20 % and specific gravity 2.65. The critical hydraulic gradient for seepage through the soil to create the quicksand conditio...

A shallow footing is subjected to a vertical load. Within the elastic limit of the underlying soil, the TRUE statement(s) is/are:

The results of a consolidated drained triaxial test on a normally consolidated clay are shown in the figure. The angle of internal friction is

Which of the following statements is/are INCORRECT?

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...

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 of solids in th...

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

A cut slope is made in a silty clay soil for a new road project, as shown in the figure. The locations of ground water table (GWT) and potential failure surface are shown in the fi...

Two soils of permeabilities k₁ and k2 are placed in a horizontal flow apparatus, as shown in the figure. For Soil 1, L1 = 50 cm, and k₁ = 0.055 cm/s; for Soil 2, L2 = 30 cm, and k2...

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...

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

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...

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...

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 the...

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 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...

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...

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 ($\sigma_z$) at any point (r, z), within the half-sp...

In the given figure, Point O indicates the stress point of a soil element at initial non-hydrostatic stress condition. For the stress path (OP), which of the following loading cond...

A soil having the average properties, bulk unit weight = 19 kN/m³; angle of internal friction = 25° and cohesion = 15 kPa, is being formed on a rock slope existing at an inclinatio...

For the flow setup shown in the figure (not to scale), the hydraulic conductivities of the two soil samples, Soil 1 and Soil 2, are 10 mm/s and 1 mm/s, respectively. Assume the uni...

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...

Stresses acting on an infinitesimal soil element are shown in the figure (with $\sigma_z > \sigma_x$). The major and minor principal stresses are $\sigma_1$ and $\sigma_3$, respect...

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...

An uncompacted heap of soil has a volume of 10000 m³ and void ratio of 1. If the soil is compacted to a volume of 7500 m³, then the corresponding void ratio of the compacted soil i...

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...

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 correct match between the physical states of the soils given in Group I and the governing conditions given in Group II is Group I 1. normally consolidated soil 2. quick clay 3....

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

A soil sample is underlying a water column of height h₁, as shown in the figure. The vertical effective stresses at points A, B, and C are $\sigma_A'$, $\sigma_B'$, and $\sigma_C'$...

A partially-saturated soil sample has natural moisture content of 25% and bulk unit weight of 18.5 kN/m³. The specific gravity of soil solids is 2.65 and unit weight of water is 9....

The internal ($d_i$) and external ($d_o$) diameters of a Shelby sampler are 48 mm and 52 mm, respectively. The area ratio ($A_r$) of the sampler (in %, round off to two decimal pla...

The cohesion (c), angle of internal friction (φ) and unit weight (γ) of a soil are 15 kPa, 20° and 17.5 kN/m³, respectively. The maximum depth of unsupported excavation in the soil...

A clay layer of thickness H has a preconsolidation pressure $p_c$ and an initial void ratio $e_0$. The initial effective overburden stress at the mid-height of the layer is $p_0$....

From laboratory investigations, the liquid limit, plastic limit, natural moisture content and flow index of a soil specimen are obtained as 60%, 27%, 32% and 27, respectively. The...

The soil profile at a construction site is shown in the figure (not to scale). Ground water table (GWT) is at 5 m below the ground level at present. An old well data shows that the...

The soil profile at a road construction site is as shown in figure (not to scale). A large embankment is to be constructed at the site. The ground water table (GWT) is located at t...

The void ratio of a clay soil sample M decreased from 0.575 to 0.510 when the applied pressure is increased from 120 kPa to 180 kPa. For the same increment in pressure, the void ra...

Which one of the following statements is NOT correct?

In a drained triaxial compression test, a sample of sand fails at deviator stress of 150 kPa under confining pressure of 50 kPa. The angle of internal friction (in degree, round of...

The total stress paths corresponding to different loading conditions, for a soil specimen under the isotropically consolidated stress state (O), are shown below The correct match b...

The soil profile at a site up to a depth of 10 m is shown in the figure (not drawn to the scale). The soil is preloaded with a uniform surcharge (q) of 70 kN/m² at the ground level...

Water flows in the upward direction in a tank through 2.5 m thick sand layer as shown in the figure. The void ratio and specific gravity of sand are 0.58 and 2.7, respectively. The...

A 10 m thick clay layer is resting over a 3 m thick sand layer and is submerged. A fill of 2 m thick sand with unit weight of 20 kN/m³ is placed above the clay layer to accelerate...

In a soil specimen, the total stress, effective stress, hydraulic gradient and critical hydraulic gradient are σ, σ', i and ic, respectively. For initiation of quicksand condition,...

A soil has specific gravity of its solids equal to 2.65. The mass density of water is 1000 kg/m³. Considering zero air voids and 10% moisture content of the soil sample, the dry de...

For the following statements: P – The lateral stress in the soil while being tested in an oedometer is always at-rest. Q – For a perfectly rigid strip footing at deeper depths in a...

Let G be the specific gravity of soil solids, w the water content in the soil sample, $\gamma_w$ the unit weight of water, and $\gamma_d$ the dry unit weight of the soil. The equat...

Consider the following statements related to the pore pressure parameters, A and B: P. A always lies between 0 and 1.0 Q. A can be less than 0 or greater than 1.0 R. B always lies...

The contact pressure and settlement distribution for a footing are shown in the figure. The figure corresponds to a

A soil sample is subjected to a hydrostatic pressure, σ. The Mohr circle for any point in the soil sample would be

Which one of the following statements is NOT correct? (A) When the water content of soil lies between its liquid limit and plastic limit, the soil is said to be in plastic state. (...

A uniformly distributed line load of 500 kN/m is acting on the ground surface. Based on Boussinesq's theory, the ratio of vertical stress at a depth 2 m to that at 4 m, right below...

The initial concavity in the load-penetration curve of a CBR test is NOT due to

In a shrinkage limit test, the volume and mass of a dry soil pat are found to be 50 cm³ and 88 g, respectively. The specific gravity of the soil solids is 2.71 and the density of w...

A core cutter of 130 mm height has inner and outer diameters of 100 mm and 106 mm, respectively. The area ratio of the core cutter (in %, up to two decimal places) is _________

A 3 m thick clay layer is subjected to an initial uniform pore pressure of 145 kPa as shown in the figure. For the given ground conditions, the time (in days, rounded to the neares...

Three soil specimens (Soil 1, Soil 2 and Soil 3), each 150 mm long and 100 mm diameter, are placed in series in a constant head flow set-up as shown in the figure. Suitable screens...

Following are the statements related to the stress paths in a triaxial testing of soils: P. If σ1 = σ3, the stress point lies at the origin of the p-q plot. Q. If σ1 = σ3, the stre...

The laboratory tests on a soil sample yields the following results: natural moisture content = 18%, liquid limit = 60%, plastic limit = 25%, percentage of clay sized fraction = 25%...

The compression curve (void ratio, e vs. effective stress, σν') for a certain clayey soil is a straight line in a semi-logarithmic plot and it passes through the points (e = 1.2; σ...

A conventional drained triaxial compression test was conducted on a normally consolidated clay sample under an effective confining pressure of 200 kPa. The deviator stress at failu...

The void ratio of a soil is 0.55 at an effective normal stress of 140 kPa. The compression index of the soil is 0.25. In order to reduce the void ratio to 0.4, an increase in the m...

The infinite sand slope shown in the figure is on the verge of sliding failure. The ground water table coincides with the ground surface. Unit weight of water $\gamma_w$ = 9.81 kN/...

A consolidated undrained (CU) triaxial compression test is conducted on a normally consolidated clay at a confining pressure of 100 kPa. The deviator stress at failure is 80 kPa, a...

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...

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...

Which one of the following relations is not correct?

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