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Recent questions and answers in Geotechnical Engineering
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1
GATE2020CE17
In a twodimensional stress analysis, the state of stress at a point $P$ is $\begin{bmatrix} \sigma \end{bmatrix} = \begin{bmatrix}\sigma_{xx} &\tau_{xy} \\ \tau_{xy} &\sigma_{yy} \end{bmatrix}$ The necessary and sufficient condition for existence of the state of pure shear at ... $\tau_{xy}=0$ $\sigma_{xx}+\sigma_{yy}=0$ $(\sigma_{xx}\sigma_{yy})^2+4\tau^2_{xy}=0$
asked
Feb 28, 2020
in
Geotechnical Engineering
by
jothee
(
2.7k
points)
gate2020ce1
matrix
twodimensionalflow
geotechnicalengineering
0
votes
0
answers
2
GATE2020CE18
During the process of hydration of cement, due to increase in Dicalcium Silicate $(C_2S)$ content in cement clinker, the heat of hydration increases decreases initially decreases and then increases does not change
asked
Feb 28, 2020
in
Geotechnical Engineering
by
jothee
(
2.7k
points)
gate2020ce1
geotechnicalengineering
hydration
0
votes
0
answers
3
GATE2020CE19
The Los Angeles test for stone aggregates is used to examine abrasion resistance crushing strength soundness specific gravity
asked
Feb 28, 2020
in
Foundation Engineering
by
jothee
(
2.7k
points)
gate2020ce1
foundationengineering
geotechnicalengineering
0
votes
0
answers
4
GATE2020CE110
Which one of the following statements is. $\textbf{NOT}$ correct? A clay deposit with a liquidity index greater than unity is in a state of plastic consistency. The cohesion of normally consolidated clay is zero when triaxial test is conducted ... 's equation predicts higher value of vertical stress at a point directly beneath the load as compared to Westergaards's equation.
asked
Feb 28, 2020
in
Geotechnical Engineering
by
jothee
(
2.7k
points)
gate2020ce1
geotechnicalengineering
0
votes
0
answers
5
GATE2020CE111
In a soil investigation work at a site, Standard Penetration Test (SPT) was conducted at every $1.5\:m$ interval upto $30\: m$ depth. At $3\:m$ depth, the observed number of hammer blows for three successive $150\:mm$ penetrations were $8,6$ and $9$,respectively. The SPT Nvalue at $3\:m$ depth, is $23$ $17$ $15$ $14$
asked
Feb 28, 2020
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce1
soilmechanics
geotechnicalengineering
spt
0
votes
0
answers
6
GATE2020CE122
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 off to the nearest integer) of the sample, is ______
asked
Feb 28, 2020
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce1
soilmechanics
geotechnicalengineering
characteristicsofsand
numericalanswers
0
votes
0
answers
7
GATE2020CE123
A fully submerged infinite sandy slope has an inclination of $30^\circ{}$ with the horizontal. The saturated unit weight and effective angle of internal friction of sand are $18\:kN/m^3$ and $38^\circ{}$ ... is parallel to the slope. Against shear failure of the slope, the factor of safety (round off to two decimal places) is ______.
asked
Feb 28, 2020
in
Foundation Engineering
by
jothee
(
2.7k
points)
gate2020ce1
foundationengineering
geotechnicalengineering
stabilityofslopes
numericalanswers
0
votes
0
answers
8
GATE2020CE128
Distributed load(s) of $50\:kN/m$ may occupy position(s) (either continuously or in patches) on the girder $\textbf{PQRST}$ as shown in the figure (not drawn to the scale) The maximum negative (hogging) bending moment (in $kN.m$) that occurs at point $\textbf{R}$, is $22.50$ $56.25$ $93.75$ $150.00$
asked
Feb 28, 2020
in
Geotechnical Engineering
by
jothee
(
2.7k
points)
gate2020ce1
geotechnicalengineering
0
votes
0
answers
9
GATE2020CE134
The total stress paths corresponding to different loading conditions, for a soil specimen under the isotropically consolidated stress state (O), are shown below ... $OPIII, OQII, ORI, OSIV$ $OPI, OQIII, ORII, OSIV$
asked
Feb 28, 2020
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce1
soilmechanics
geotechnicalengineering
stresspaths
0
votes
0
answers
10
GATE2020CE135
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 $70\:kN/m^2$ at the ground level. The water table is at a depth of $3\:m$ below ground level. The soil unit weight ... $kPa$) at points $P$ and $Q$, respectively, are $124$ and $204$ $36$ and $ 90$ $36$ and $126$ $54$ and $95$
asked
Feb 28, 2020
in
Foundation Engineering
by
jothee
(
2.7k
points)
gate2020ce1
foundationengineering
geotechnicalengineering
watertable
0
votes
0
answers
11
GATE2020CE146
A vertical retaining wall of $5\:m$ height has to support soil having unit weight of $18\:kN/m^3$ , effective cohesion of $12\:kN/m^2$, and effective friction angle of $30^\circ{}$ . As per Rankine's earth pressure theory and assuming that a ... has occurred, the lateral active thrust on the wall per meter length ( in $kN/m$ , round off to two decimal places), is __________
asked
Feb 28, 2020
in
Foundation Engineering
by
jothee
(
2.7k
points)
gate2020ce1
foundationengineering
geotechnicalengineering
rankinestheory
numericalanswers
0
votes
0
answers
12
GATE2020CE147
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 sand is fully saturated. Unit weight of water is $10\:kN/m^3$. The ... (in $kPa$, round off to two decimal places) at point $\textbf{A}$, located $1\:m$ above the base of tank, is ______.
asked
Feb 28, 2020
in
Geotechnical Engineering
by
jothee
(
2.7k
points)
gate2020ce1
geotechnicalengineering
soilmechanics
numericalanswers
0
votes
0
answers
13
GATE2020CE148
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 $20\:kN/m^3$ is placed above the clay layer to accelerate the rate of consolidation of the clay layer. ... settlement (in $mm$, round off to two decimal places) of the clay layer, $10$ years after the construction of the fill, is ______.
asked
Feb 28, 2020
in
Foundation Engineering
by
jothee
(
2.7k
points)
gate2020ce1
foundationengineering
geotechnicalengineering
settlementanalysisinclays
numericalanswers
0
votes
0
answers
14
GATE2020CE150
In a homogenous unconfined aquifer of area $3.00\:km^2$, the water table was at an elevation of $102.00\:m$. After a natural recharge of volume $0.90$ million cubic meter $(Mm^3)$, the water table rose to $103.20\:m$. After this recharge,ground ... $Mm^3$ and round off to two decimal places), is ______.
asked
Feb 28, 2020
in
Foundation Engineering
by
jothee
(
2.7k
points)
gate2020ce1
watertable
foundationengineering
geotechnicalengineering
numericalanswers
0
votes
0
answers
15
GATE2020CE153
A gaseous chemical has a concentration of $41.6\:\mu mol/m^3$ in air at $1$ atm pressure and temperature $293\:K$. The universal gas constant $R$ is $82.05\times10^{6}\;(m^3\:atm)/(mol\:K)$. Assuming that ideal gas law is valid , the concentration of the gaseous chemical (in ppm, round off to one decimal place), is ______.
asked
Feb 28, 2020
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce1
soilmechanics
geotechnicalengineering
upliftpressure
temperature
numericalanswers
0
votes
0
answers
16
GATE2020 CE26
The state of stress represented by Mohr’s circle shown in the figure is uniaxial tension biaxial tension of equal magnitude hydrostatic stress pure shear
asked
Feb 13, 2020
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
soilmechanics
geotechnicalengineering
mohr'scircle
stresspaths
0
votes
0
answers
17
GATE2020 CE210
Soil deposit formed due to transportation by wind is termed as aeolian deposit alluvial deposit estuarine deposit lacustrine deposit
asked
Feb 13, 2020
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
soilmechanics
geotechnicalengineering
soilstructureandfabric
0
votes
0
answers
18
GATE2020 CE211
A sample of $500\:g$ dry sand, when poured into a $2$ litre capacity cylinder which is partially filled with water, displaces $188\:cm^3$ of water. The density of water is $1\:g/cm^3.$ The specific gravity of the sand is $2.72$ $2.66$ $2.55$ $2.52$
asked
Feb 13, 2020
in
Geotechnical Engineering
by
jothee
(
2.7k
points)
gate2020ce2
geotechnicalengineering
soilmechanics
0
votes
0
answers
19
GATE2020 CE222
A soil has dry unit weight of $15.5\: kN/m^3$, specific gravity of $2.65$ and degree of saturation of $72\: %.$ Considering the unit weight of water as $10\: kN/m^3$, the water content of the soil (in $\%$ round off to two decimal places) is __________.
asked
Feb 13, 2020
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
numericalanswers
soilmechanics
geotechnicalengineering
0
votes
0
answers
20
GATE2020 CE223
A onedimensional consolidation test is carried out on a standard $19\: mm$ thick clay sample. The oedometer’s deflection gauge indicates a reading of $2.1\: mm$, just before removal of the load, without allowing any swelling. The void ratio is $0.62$ at this stage. The initial void ratio (round off to two decimal places) of the standard specimen is __________.
asked
Feb 13, 2020
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
numericalanswers
soilmechanics
geotechnicalengineering
onedimensionalconsolidation
0
votes
0
answers
21
GATE2020 CE225
Two identically sized primary settling tanks receive water for $\text{TypeI}$ settling (discrete particles in dilute suspension) under laminar flow conditions. The Surface Overflow Rate (SOR) maintained in the two tanks are $30\ m^3/m^2.d$ and $15\: m^3/m^2.d$. ... $d_{15}$ respectively. The ratio, $\large \dfrac{d_{30}}{d_{15}}$ (round off to two decimal places), is ________.
asked
Feb 13, 2020
in
Geotechnical Engineering
by
jothee
(
2.7k
points)
gate2020ce2
numericalanswers
geotechnicalengineering
0
votes
0
answers
22
GATE2020 CE234
Permeability tests were carried out on the samples collected from two different layers as shown in the figure (not drawn to the scale). The relevant horizontal $(k_h)$ and vertical $(k_v)$ coefficients of permeability are indicated for each layer. The ratio of the equivalent horizontal to vertical coefficients of permeability, is $37.29$ $80.20$ $68.25$ $0.03$
asked
Feb 13, 2020
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
coefficientofpermeability
soilmechanics
geotechnicalengineering
0
votes
0
answers
23
GATE2020 CE235
A $10\ m$ high slope of dry clay soil $\text{( unit weight}\: = 20 kN/m^3$), with a slope angle of $45^{\circ}$and the circular slip surface, is shown in the figure (not drawn to the scale). The weight of the slip wedge is denoted by $W$. The undrained unit cohesion $(c_u)$ is $60\: kPa$. The factor of safety of the slope against slip failure, is $1.84$ $1.57$ $0.58$ $1.67$
asked
Feb 13, 2020
in
Geotechnical Engineering
by
jothee
(
2.7k
points)
gate2020ce2
geotechnicalengineering
characteristicsofclay
soilmechanics
0
votes
0
answers
24
GATE2020 CE246
A footing of size $2\: m \times 2\: m$ transferring a pressure of $200\: kN/m^2$, is place at a depth of $1.5\: m$ below the ground as shown in the figure (not drawn to the scale ). The clay stratum is normally consolidated. The clay has ... $\gamma_w= 10\: kN/m^3$, the primary consolidation settlement in (in mm, round off to two decimal places) of the clay stratum is ________.
asked
Feb 13, 2020
in
Foundation Engineering
by
jothee
(
2.7k
points)
gate2020ce2
numericalanswers
foundationengineering
geotechnicalengineering
settlementanalysisinclays
0
votes
0
answers
25
GATE2020 CE247
A constanthead permeability test was conducted on a soil specimen under a hydraulic gradient of $2.5$. The soil specimen has specific gravity of $2.65$ and saturated water content of $20\%.$ If the coefficient of permeability of the soil is $0.1\: cm/s$, the seepage velocity (in $cm/s,$ round off to two decimal places) through the soil specimen is ________.
asked
Feb 13, 2020
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
numericalanswers
soilmechanics
geotechnicalengineering
coefficientofpermeability
0
votes
0
answers
26
GATE2020 CE248
A $5\: m$ high vertical wall has a saturated clay backfill. The saturated unit weight and cohesion of clay are $18\: kN/m^3$ and $20\: kPa$, respectively. The angle of internal friction of clay is zero. In order to prevent development of tension zone, the ... tension zone, the minimum height (in $m$, round off to one decimal place) by which the wall has to be raised, is ________.
asked
Feb 13, 2020
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
numericalanswers
soilmechanics
geotechnicalengineering
0
votes
0
answers
27
2015 gate mcq true or false type
State true statement for degree of disturbance of collected soil sample
asked
Dec 19, 2019
in
Soil Mechanics
by
Pratikshanere
(
120
points)
0
votes
0
answers
28
GATE2017 CE24
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 $\gamma_d$ ... $\gamma_d = \dfrac{Gw}{1 + \gamma_w} \\$ $\gamma_d = \dfrac{Gw}{1  \gamma_w}$
asked
Aug 7, 2019
in
Soil Mechanics
by
gatecse
(
3.9k
points)
gate2017ce2
soilmechanics
geotechnicalengineering
0
votes
0
answers
29
GATE2017 CE25
Consider the following statements related to pore pressure parameters, $A$ and $B$: $A$ always lies between $0$ and $1.0$ $A$ can be less than $0$ or greater than $1.0$ $B$ always lies between $0$ and $1.0$ $B$ can be less than $0$ or greater than $1.0$ For these statements, which of the following options is correct? P and R P and S Q and R Q and S
asked
Aug 7, 2019
in
Geotechnical Engineering
by
gatecse
(
3.9k
points)
gate2017ce2
geotechnicalengineering
0
votes
0
answers
30
GATE2017 CE217
The plate load test was conducted on a clayey strata by using a plate of $0.3 \: m \times 0.3 \: m$ dimensions, and the ultimate load per unit area for the plate for found to be $180$ kPa. The ultimate bearing capacity (in kPa) of a $2$ m wide square footing would be $27$ $180$ $1200$ $2000$
asked
Aug 7, 2019
in
Foundation Engineering
by
gatecse
(
3.9k
points)
gate2017ce2
foundationengineering
geotechnicalengineering
plateloadtest
0
votes
0
answers
31
GATE2017 CE221
A sheet pile has an embedment depth of $12$ m in a homogeneous soil stratum. The coefficient of permeability of soil is $10^{6} m/s$. Difference in the water levels between the two sides of the sheet pile is $4$ m. The flow net is constructed with ... of equipotential lines. The quantity of seepage (in $cm^3/s$ per m, up to one decimal place) under the sheet pile is _________
asked
Aug 7, 2019
in
Foundation Engineering
by
gatecse
(
3.9k
points)
gate2017ce2
numericalanswers
foundationengineering
geotechnicalengineering
typesofpiles
0
votes
0
answers
32
GATE2017 CE224
The infiltration capacity of a soil follows the Horton's exponential model, $f=c_1+c_2e^{kt}$. During an experiment, the initial infiltration capacity was observed to be $200$ mm/h. After a long time, the infiltration capacity was reduced $25$ mm/h. If the filtration capacity ... $k$ (in $h^{1}$, up to two decimal places) is ________
asked
Aug 7, 2019
in
Soil Mechanics
by
gatecse
(
3.9k
points)
gate2017ce2
numericalanswers
soilmechanics
geotechnicalengineering
0
votes
0
answers
33
GATE2017 CE234
Two identical concrete piles having the plan dimensions $50 \: cm \times 50 \: cm$ are driven into a homogeneous sandy layers as shown in the figures. Consider the bearing capacity factor $N_q$ for $\phi = 30 ^{\circ}$ as $24$. If $Q_{P1}$ and $Q_{P2}$ represent the ultimate point ... by about $100 \%$ $Q_{P1} > Q_{P2}$ by about $5 \%$ $Q_{P1} < Q_{P2}$ by about $5 \%$
asked
Aug 7, 2019
in
Foundation Engineering
by
gatecse
(
3.9k
points)
gate2017ce2
foundationengineering
geotechnicalengineering
bearingcapacity
typesofpiles
0
votes
0
answers
34
GATE2017 CE235
Following are the statements related to the stress paths in a triaxial testing of soils: If $\sigma_1 = \sigma_3$, the stress point lies at the origin of the $pq$ plot If $\sigma_1 = \sigma_3$, the stress point lies on the $p$axis of the $pq$ plot If $\sigma_1 > \sigma_3$, ...  True P  True; Q  False; R  True P  False; Q  True; R  False P  True; Q  False; R  False
asked
Aug 7, 2019
in
Soil Mechanics
by
gatecse
(
3.9k
points)
gate2017ce2
soilmechanics
geotechnicalengineering
stresspaths
0
votes
0
answers
35
GATE2017 CE241
Two plates od $8$ mm thickness each are connected by a fillet weld of $6$ mm thickness as shown in the figure. The permissible stresses in the plate and the weld are $150$ MPa and $110$ MPa, respectively. Assuming the length of the weld shown in the figure to be the effective length, the permissible load $P$ (in kN) is ______
asked
Aug 7, 2019
in
Foundation Engineering
by
gatecse
(
3.9k
points)
gate2017ce2
numericalanswers
foundationengineering
geotechnicalengineering
plateloadtest
0
votes
0
answers
36
GATE2017 CE244
Consider a square shaped area ABCD on the ground with its centre at M as shown in the figure. Four concentrated vertical loads of $P=5000$ kN are applied on this area, one at each corner. The vertical stress increment (in kPa, up to one decimal place) due to these loads according to the Boussinesq’s equation, at a point $5$ m right below M, is _______
asked
Aug 7, 2019
in
Foundation Engineering
by
gatecse
(
3.9k
points)
gate2017ce2
numericalanswers
boussinesq'stheory
foundationengineering
geotechnicalengineering
0
votes
1
answer
37
GATE2019 CE2: 52
A $2 \: m \times 4 \: m$ rectangular footing has to carry a uniformly distributed load of $120 \: kPa$. As per the $2:1$ dispersion method of stress distribution, the increment in vertical stress (in $kPa$) at a depth of $2\: m$ below the footing is _______
answered
Mar 4, 2019
in
Foundation Engineering
by
yasir900
(
140
points)
gate2019ce2
numericalanswers
foundationengineering
geotechnicalengineering
stressdistribution
0
votes
1
answer
38
GATE2019 CE1: 55
A square footing of $ 4 \: m$ side is placed at $1 \: m$ depth in a sand deposit. The dry unit weight $( \gamma)$ of sand is $15 \: kN/m^3$. This footing has an ultimate bearing capacity of $600 \: kPa$ ... deposit. For a factor of safety of $3.0$ as per Terzaghi's theory, the safe bearing capacity (in $kPa$) of this footing would be _________
answered
Feb 20, 2019
in
Foundation Engineering
by
Abhishek Bijarnia
(
140
points)
gate2019ce1
numericalanswers
foundationengineering
geotechnicalengineering
bearingcapacityfactor
0
votes
0
answers
39
GATE2019 CE1: 16
A retaining wall of height $H$ with smooth vertical backface supports a backfill inclined at an angle $\beta$ with the horizontal. The backfill consists of cohesionless soil having angle of internal friction $\phi$. If the active lateral thrust acting on the wall is $P_a$ ... $P_a$ acts at a height $H/3$ from the base of the wall and at an angle $\phi$ with the horizontal
asked
Feb 14, 2019
in
Soil Mechanics
by
Arjun
(
2.8k
points)
gate2019ce1
soilmechanics
geotechnicalengineering
0
votes
0
answers
40
GATE2019 CE1: 17
In a soil specimen, the total stress, effective stress, hydraulic gradient and critical hydraulic gradient are $\sigma, \: \sigma’$, $i$ and $i_c$, respectively. For initiation of quicksand condition, which one of the following statements is TRUE? $\sigma’ \neq 0$ and $i=i_c$ $\sigma’ = 0$ and $i=i_c$ $\sigma’ \neq 0$ and $i \neq i_c$ $\sigma = 0$ and $i=i_c$
asked
Feb 14, 2019
in
Soil Mechanics
by
Arjun
(
2.8k
points)
gate2019ce1
soilmechanics
geotechnicalengineering
quicksandcondition
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