All Exams >
Civil Engineering (CE) >
Mock Test Series of SSC JE Civil Engineering 2025 >
All Questions
All questions of Soil Mechanics for Civil Engineering (CE) Exam
A soil mass has a void ratio of 0.67? How much water (in litres) will be required to fully saturate 1 m3 of the soil?- a)67
- b)670
- c)300
- d)401
Correct answer is option 'D'. Can you explain this answer?
A soil mass has a void ratio of 0.67? How much water (in litres) will be required to fully saturate 1 m3 of the soil?
a)
67
b)
670
c)
300
d)
401
|
Akshat Datta answered |
e = 0.68
Volume of soil = 1m3
0.67 VS = 1 – VS
1.67 VS = 1
VV = V – VS = 1 – 0.598 = 0.402 m3
Initially we assume that soil is completely dry
VV = Vwater required to fully saturate the soil mass
Vwater = 0.402 × 1000 = 402 litres
In Boussinesq’s solution to the problem of stress distribution, all the following assumptions are made, except:- a)Soil mass is semi-infinite
- b)The elastic modulus of soil is constant
- c)Soil is homogeneous
- d)Soil is anisotropic
Correct answer is option 'D'. Can you explain this answer?
In Boussinesq’s solution to the problem of stress distribution, all the following assumptions are made, except:
a)
Soil mass is semi-infinite
b)
The elastic modulus of soil is constant
c)
Soil is homogeneous
d)
Soil is anisotropic
|
Gowri Singh answered |
Assumptions made in Boussinesq’s Theory are:
1. Soil is homogeneous, semi-infinite, elastic and isotropic.
2. Hooke’s law is valid.
3. Any change in the volume of soil due to application of load is neglected.
4. Distribution of stresses along the vertical axis is symmetrical.
5. Self-weight of soil is neglected.
The permeability of a soil varies:- a)directly as the square of grain size
- b)inversely as the grain size
- c)directly as the grain size
- d)inversely as the square of grain size
Correct answer is option 'A'. Can you explain this answer?
The permeability of a soil varies:
a)
directly as the square of grain size
b)
inversely as the grain size
c)
directly as the grain size
d)
inversely as the square of grain size
|
Simran Dasgupta answered |
Where Ss = specific surface area = 
Where d = grain size
So, permeability is directly proportional to the square of grain size.
Which of the following shows the CORRECT order of increasing surface areas of the given soil?- a)Clay < silt < sand < colloids
- b)Gravel < silt < colloids < clay
- c)Sand < silt < clay < colloids
- d)Silt < gravel < colloids < clay
Correct answer is option 'C'. Can you explain this answer?
Which of the following shows the CORRECT order of increasing surface areas of the given soil?
a)
Clay < silt < sand < colloids
b)
Gravel < silt < colloids < clay
c)
Sand < silt < clay < colloids
d)
Silt < gravel < colloids < clay
|
|
Sankar Dasgupta answered |
Specific Surface area is inversely proportional to grain size. Out of sand, silt, clay and colloids, Sand has highest grain size while colloids have least grain size.
The angle of inclination of the plane at which the body begins to move down the plane, is called- a)Angle of friction
- b)Angle of projection
- c)Angle of repose
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
The angle of inclination of the plane at which the body begins to move down the plane, is called
a)
Angle of friction
b)
Angle of projection
c)
Angle of repose
d)
None of these
|
|
Sahana Choudhary answered |
The angle of inclination of the plane at which the body begins to move down the plane, is called angle of repose.
What is the assumption made about back of wall, in the Rankine’s theory of earth pressure?- a)Plane and rough
- b)Plane and smooth
- c)Vertical and rough
- d)Vertical and smooth
Correct answer is option 'D'. Can you explain this answer?
What is the assumption made about back of wall, in the Rankine’s theory of earth pressure?
a)
Plane and rough
b)
Plane and smooth
c)
Vertical and rough
d)
Vertical and smooth
|
|
Sahana Choudhary answered |
Assumptions given by Rankine are:
1. The soil is homogeneous and isotropic, which means c, φ and γ have the same values everywhere, and they have the same values in all directions at every point.
2. The most critical shear surface is a plane.
3. The ground surface is a plane.
4. The wall is infinitely long so that the problem may be analysed in only two dimensions.
5. The wall moves sufficiently to develop the active or passive condition.
6. The wall surface at the back is vertical and smooth.
The term _________ on soil is used to indicate the maximum pressure which can be exerted on soil while taking into account shear failure, settlement and the ability of structure to resist settlement.- a)Bearing capacity
- b)Net pressure intensity
- c)Allowable bearing pressure
- d)Maximum safe bearing capacity
Correct answer is option 'C'. Can you explain this answer?
The term _________ on soil is used to indicate the maximum pressure which can be exerted on soil while taking into account shear failure, settlement and the ability of structure to resist settlement.
a)
Bearing capacity
b)
Net pressure intensity
c)
Allowable bearing pressure
d)
Maximum safe bearing capacity
|
|
Pranavi Choudhury answered |
The value of Allowable Bearing Pressure on soil depends on the nature of ground and the type of building. The maximum safe bearing capacity of soil is generally more than the allowable bearing pressure on soil.
Shear strength of soil increases with increase in -- a)cohesion of soil
- b)angle of internal friction
- c)normal stress on soil
- d)all the above
Correct answer is option 'D'. Can you explain this answer?
Shear strength of soil increases with increase in -
a)
cohesion of soil
b)
angle of internal friction
c)
normal stress on soil
d)
all the above
|
|
Pranavi Choudhury answered |
Shearstrength,τ=C+σtanϕ
Where C = Cohesion
σ = Nomal stress
ϕ = Angle of internal friction.
So all the above options are correct. Shear strength will increase with increase in cohesion, angle of internal friction and normal stress on soil.
The shear test in which full consolidation occurs and excess pore pressure is build up during shearing stage is known as:- a)a CD test
- b)a CU test
- c)a UU test
- d)a UC test
Correct answer is option 'B'. Can you explain this answer?
The shear test in which full consolidation occurs and excess pore pressure is build up during shearing stage is known as:
a)
a CD test
b)
a CU test
c)
a UU test
d)
a UC test
|
|
Sahil Chawla answered |
In first stage (application of cell pressure stage) soil will consolidate because drainage valve is open and pore water is drain out of soil leads to consolidation, In second stage (Shearing stage) drainage valves are closed leads to development of excess pore water pressure, this implies first stage is consolidated(C) and second stage is undrained(U). So the test is CU test.
What is the ratio of discharge through the tube well to the discharge through the open well- a)100
- b)50
- c)150
- d)200
Correct answer is option 'B'. Can you explain this answer?
What is the ratio of discharge through the tube well to the discharge through the open well
a)
100
b)
50
c)
150
d)
200
|
|
Rithika Reddy answered |
Discharge through the open well is in the range of (3-6) litres/sec while discharge through the tube well is in the range of (200 - 220) l/sec. So the approximate ratio is 50.
The pile provided with one or more bulbs in its vertical shaft, is generally known as- a)Under reamed pile
- b)Friction - pile
- c)Bearing - pile
- d)Sheet - pile
Correct answer is option 'A'. Can you explain this answer?
The pile provided with one or more bulbs in its vertical shaft, is generally known as
a)
Under reamed pile
b)
Friction - pile
c)
Bearing - pile
d)
Sheet - pile
|
|
Siddharth Bajaj answered |
The pile provided with one or more bulbs in the vertical shaft is known as under reamed pile. This kind of pile is provided in case of expansive soil like black cotton soil.
If the fineness modulus of sand is 3, then the sand is graded as- a)very fine sand
- b)fine sand
- c)medium sand
- d)coarse sand
Correct answer is option 'D'. Can you explain this answer?
If the fineness modulus of sand is 3, then the sand is graded as
a)
very fine sand
b)
fine sand
c)
medium sand
d)
coarse sand
|
Ankit Joshi answered |
Fineness modulus of sand:
1. Fine sand: 2.2 to 2.6
2. Medium sand: 2.6 to 2.9
3. Coarse sand: 2.9 to 3.2
So, Fineness modulus 3 corresponds to coarse sand.
Find the shrinkage ration of a soil sample whose plastic limit and liquid limit values are 30% and 42%, respectively, and the values of percentage of volume change from liquid limit to dry state and plastic limit to dry state are 35% and 22%, respectively, of dry volume.- a)0.965
- b)1.83
- c)0.74
- d)1.083
Correct answer is option 'D'. Can you explain this answer?
Find the shrinkage ration of a soil sample whose plastic limit and liquid limit values are 30% and 42%, respectively, and the values of percentage of volume change from liquid limit to dry state and plastic limit to dry state are 35% and 22%, respectively, of dry volume.
a)
0.965
b)
1.83
c)
0.74
d)
1.083
|
|
Kirti Sharma answered |
corresponding change in the water content of the soil above shrinkage limit.
are percentage change of volume from liquid limit to dry state and plastic limit to dry state respectivelyW1 and W2 are corresponding water content
In vane shear test, the torque rod is rotated at a uniform speed of:- a)0.1° per second
- b)1° per minute
- c)1’ per minute
- d)1’ per second
Correct answer is option 'A'. Can you explain this answer?
In vane shear test, the torque rod is rotated at a uniform speed of:
a)
0.1° per second
b)
1° per minute
c)
1’ per minute
d)
1’ per second
|
|
Rithika Reddy answered |
In Vane shear test, the vane is pushed in to the soil and torque is applied manually which is measured by a calibrated torsional spring. The rate of rotation of vane is nearly 6o per minute or 0.1o per second.
Spring analogy in soil mechanics is used for explaining which of the following phenomenon?- a)Compaction
- b)Drainage
- c)Elasticity
- d)Consolidation
Correct answer is option 'D'. Can you explain this answer?
Spring analogy in soil mechanics is used for explaining which of the following phenomenon?
a)
Compaction
b)
Drainage
c)
Elasticity
d)
Consolidation
|
|
Sahana Choudhary answered |
Terzaghi in 1922 demonstrated a model (Spring-piston model) to study the mechanism of consolidation in clay. The model consists of a cylindrical vessel with the series of pistons separated by springs. The space between the springs is filled with water and the pistons are perforated so as to allow through communication to water. Piezometers are inserted at the centres of each of the compartments to measure the pressure heads due to excess pore water pressures. The springs surrounded by water represent the saturated soil. The springs represents the soil skeleton and the water in the vessel represents the water filling the voids in the soil.
The maximum height of an unsupported vertical cut in a cohesive soil is given by ________- a)
- b)
- c)
- d)
Correct answer is option 'D'. Can you explain this answer?
The maximum height of an unsupported vertical cut in a cohesive soil is given by ________
a)
b)
c)
d)
|
|
Sankar Dasgupta answered |
Depth at which the earth pressure become zero in case of cohesive soil is given by expression,
So the depth of unsupported vertical cut is, 
If in a soil mass, the product of degree of saturation (s) and void ratio (e) is 1. Then water content (ω) is- a)directly proportional of specific Gravity (G)
- b)Inversely proportional of specific Gravity (G)
- c)directly proportional of square of specific Gravity (G)
- d)Inversely proportional of square of specific Gravity (G)
Correct answer is option 'B'. Can you explain this answer?
If in a soil mass, the product of degree of saturation (s) and void ratio (e) is 1. Then water content (ω) is
a)
directly proportional of specific Gravity (G)
b)
Inversely proportional of specific Gravity (G)
c)
directly proportional of square of specific Gravity (G)
d)
Inversely proportional of square of specific Gravity (G)
|
|
Sahana Choudhary answered |
Se = ωG
1 = ωG
Chapter doubts & questions for Soil Mechanics - Mock Test Series of SSC JE Civil Engineering 2025 2025 is part of Civil Engineering (CE) exam preparation. The chapters have been prepared according to the Civil Engineering (CE) exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
Chapter doubts & questions of Soil Mechanics - Mock Test Series of SSC JE Civil Engineering 2025 in English & Hindi are available as part of Civil Engineering (CE) exam.
Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free.
Mock Test Series of SSC JE Civil Engineering 2025
1 videos|1 docs|64 tests
|
Signup to see your scores go up within 7 days!
Study with 1000+ FREE Docs, Videos & Tests
10M+ students study on EduRev
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup