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Soil Mechanics
54 questions · Test your knowledge
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Soil Mechanics
1
The soil often found in areas of poor drainage with high evaporation is
A
Alkaline
B
Clay
C
Kaoline
D
Peaty
2
Plastic limit of a soil is defined as
A
The water content at which the soil shows shearing resistance as the water content is reduced.
B
The limit of water content that represents the boundary between plastic and semi-solid state.
C
The lowest water content at which soil can still be completely saturated.
D
None of the above
3
The property of soil which permits the seepage of water is known as
A
Permeability
B
Porosity
C
Capillarity
D
Viscocity
4
In the process of lime stabilization of clay
A
Strength increases
B
Clay particles get flocculated into large size
C
Shrinkage limit increases
D
All the above
5
The powdered rock which includes all kinds of disintegrated rock is known as
A
Alluvial soil
B
Shale
C
Murram
D
Red soil
6
Specific gravity of a substance is the ratio of its mass in air to the mass of equal volume of water at
A
0°C
B
4°C
C
27°C
D
35°C
7
Hydrometers are normally calibrated at
A
0°C
B
20°C
C
35°C
D
40°C
8
The moisture content of a clayey soil is gradually reduced from a large value. The correct sequence of the occurrence of the limit are
A
Plastic limit, liquid limit and shrinkage limit
B
Liquid limit, plastic limit and shrinkage limit
C
Plastic limit, shrinkage limit and liquid limit
D
Shrinkage limit, plastic limit and liquid limit
9
A soil is said to be of medium size, if the uniformity coefficient is
A
Less than 5
B
Between 0 and 5
C
Between 5 and 10
D
Between 10 – 15
10
Which one of the following is not a correct statement about alluvial soil?
A
It is formed due to sediment transported by streams and rivers
B
They contain mainly iron and magnesium
C
They are loamy soils
D
It is darker in colour
11
Density of soil in SI units is expressed as
A
N/m2
B
N/m3
C
kg/m2
D
kg/m3
12
Particle size of sand is between
A
0.002 to 0.075 mm
B
0.002 to 2.0 mm
C
0.075 to 2.0 mm
D
0.0075 to 4.75 mm
13
A soil is said to be well graded if coefficient of curvature lies between
A
1 and 3
B
1 and 5
C
3 and 5
D
5 and 7
14
In the densest state void ratio of soil can be low as
A
0.2
B
0.3
C
0.15
D
0.25
15
Darcy's law is based on the assumption that
A
Soil is homogeneous and isotropic
B
Soil is saturated
C
There is laminar flow condition
D
All the above
16
Quick sand is
A
A sand which act as a quick filter
B
A uniformly graded sand
C
The conditions focusing quick flow of water through the soil
D
A condition when cohesionless soil loses its shear strength due to upward flow water
17
The soil particles of size below _____ are considered fine grained.
A
2.0 mm
B
0.002 mm
C
0.075 mm
D
0.0475 mm
18
Stoke's law is applicable to soil particles of size between
A
0.2 mm to 0.2 m
B
0.2 mm to 2 m
C
0.3 mm to 0.2 m
D
0.3 mm to 3 m
19
By compaction void ratio of uniform sized spherical particles can be reduced upto
A
0.15
B
0.25
C
0.35
D
0.45
20
The ratio of voids to total volume of soil mass is called
A
water content ratio
B
degree of saturation
C
porosity
D
void ratio
21
During electrical stabilization of soil
A
fine grained soil is drained
B
friction between particles increase
C
soil particles get flocculated to form large particles
D
All of the above
22
A pycnometer is used to determines
A
water content and voids ratio
B
water content and specific gravity
C
voids ratio and dry density
D
specific gravity and dry density
23
Cohesive soils are
A
poor for back-fill because of large lateral pressure
B
good for back-fill because of low lateral pressure
C
good for back-fill because of high shear strength
D
none of the above
24
Which one of the following is not a factor influencing coefficient permeability.
A
hydraulic gradient
B
degree of saturation
C
viscocity of water
D
size and shape of particle
25
Size of gravel is between
A
2.0 to 20 mm
B
4.75 to 80 mm
C
0.475 to 4.75 mm
D
0.475 to 2.0 mm
26
Void ratio is the ratio of volume of voids to
A
unit weight of soil
B
total volume of soil
C
volume of solids
D
none of the above
27
To remove organic matter from the soil sample to be used in sedimentation analysis, it is mixed with hydrogen peroxide at
A
20°C
B
27°C
C
60°C
D
80°C
28
Difference between liquid limit and plastic limit is known as
A
lquidity index
B
consistency index
C
plasticity index
D
none of the above
29
The piping failure in a hydraulic structure can be prevented by
A
diverting the seepage water into filter wells
B
increasing the stress due to weight of the structure
C
increasing the creep length of flows of water
D
All of the above
30
Ultimate bearing capacity of soil is the
A
maximum gross pressure at which soil fails in shear
B
maximum net pressure at which soul fails in shear
C
maximum pressure at which soil settles beyond the specified limit
D
both a and c
31
A fully saturated soil is said to be
A
one phase system
B
two phase system with soil and water
C
two phase system with soil and air
D
three phase systemv
32
The hydrostatic pressure on the phreatic line within a dam section is
A
equal to atmospheric pressure
B
greater than atmospheric pressure
C
less than atmospheric pressure
D
none of these
33
Lime stabilization is very effective in treating
A
silty soils
B
plastic clayed soils
C
sandy soils
D
non plastic soilsv
34
In engineering, soil is defined as
A
natural aggregates of mineral grains loose or moderately cohesive, inorganic or organic in nature
B
the top surface of the earth which is good for growth of plant
C
a disintegrated rock
D
All of the above
35
Aeoline deposit is a soil transport by
A
streams
B
glaciers
C
wind
D
gravity
36
Water content can be
A
zero to 100%
B
zero to 200%
C
zero to 300%
D
zero to 400%
37
Which of the following is highly permeable?
A
coarse sand
B
clay
C
gravel
D
fine sand
38
In a plate load test minimum size of plate to be used is
A
100 mm x 100 mm
B
250 mm x 250 mm
C
300 mm x 300 mm
D
400 mm x 400 mm
39
Residual soils are formed by
A
water
B
glaciers
C
wind
D
none of the above
40
The term soil Mechanics was coined by
A
Newmark
B
Terzaghi
C
newton
D
Rankine
41
Limitation of Stoke's law
A
all particles should have same specific gravity
B
it cannot be applied to particles of size smaller than 0.2 m
C
it is true for spherical particles only
D
All of the above
42
Plastic limit is defined as
A
the water content at which the soil shows shearing resistance as the water content is reduced
B
the lowest water content at which soil can still be completely saturated
C
the limit of water content that represents the boundary between plastic and semi-solid state
D
none of the above
43
Which of the following types of soil is transported by gravitational forces?
A
loess
B
drift
C
dune sand
D
talus
44
Rise of water table above the ground surface causes
A
increase in pore water pressure but decrease in total stress
B
decrease in pore water pressure but increase in total stress
C
equal decrease in pore water pressure and total stress
D
equal increase in pore water pressure and total stress
45
The ratio of volume of voids to the total volume of soil mass is called
A
porosity
B
percentage air voids
C
voids ratio
D
air content
46
Coarse grained soils are best compacted by a
A
vibratory roller
B
sheep's foot roller
C
rubber tyred roller
D
drum roller
47
The value of factor of safety adopted in foundation design is
A
1.2 to 1.5
B
1.5 to 2.0
C
2 to 3
D
3 to 4
48
Coulomb's earth pressure theory gives the same value as Rankine's theory when
A
wall is smooth and vertical
B
wall is vertical
C
wall is smooth
D
none of the above
49
The soil particles coarser than _____ can be examined by means of hand lense
A
0.15 mm
B
0.75 mm
C
0.015 mm
D
0.075 mm
50
Quick sand is a
A
flow condition occurring in both cohesive and cohesionless soils
B
flow conditions occurring in cohesionless soils
C
flow condition occurring in cohesive soils
D
type of sand
51
Mechanical stabilization of soil is done with the help of
A
proper grading
B
bitumen
C
lime
D
cement
52
When a soil sample is subjected to purely hydrostatic pressure s the Mohr's circle is
A
a circle of radius s at the origin
B
circle of radius s at distance s from the origin
C
a point at distance s from the origin
D
none of the above
53
Shrinkage limit is defined as
A
the water content at which the soil shows shearing resistance as the water content is reduced
B
the limit of water content that represents the boundary between plastic and semi-solid state
C
the lowest water content at which soil can still be completely saturated
D
none of the above
54
Alluvial deposits is the soil transported by
A
streams and rivers
B
glaciers
C
wind
D
gravity
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