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Civil Engineering
Soil Mechanics And Foundation
Quiz 1
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Q.1
Which one of the following clays behaves like a dense sand ?
over-consolidated ciay with a high over-consolidation ratio
over-consolidated clay with a low over-consolidation ratio
normally consolidated clay
under-consolidated clay
Q.2
Which of the following soils has more plasticity index ?
sand
silt
clay
gravel
Q.3
A grillage foundation
Is provided for heavily loaded isolated columns
Is treated as spread foundation
Consists of two sets of perpendicularly placed steel beams
All the above
Q.4
Residual soils are formed by
glaciers
wind
water
none of the above
Q.5
The admixture of coarser particles like sand or silt to clay causes
decrease in liquid limit and increase in plasticity index
decrease in liquid limit and no change in plasticity index
decrease in both liquid limit and plasticity index
increase in both liquid limit and plasticity index
Q.6
Coefficient of permeability of soil
does not depend upon temperature
increases with the increase in temperature
increases with the decrease in temperature
none of the above
Q.7
A 600 mm square bearing plate settles by 15 mm in plate load test on a cohesionless soil under an intensity of loading of 0.2 N/ram2. The settlement of a prototype shallow footing 1 m square under the same intensity of loading is
15 mm
between 15 mm and 25 mm
25 mm
greater than 25 mm
Q.8
A 300 mm square bearing plate settles by 15 mm in a plate load test on a cohesive soil when the intensity of loading is 0.2 N/mm². The settlement of a prototype shallow footing 1 m square under the same intensity of loading is
15 mm
30 mm
50 mm
167 mm
Q.9
The ultimate consolidation settlement of a soil is
directly proportional to the voids ratio
directly proportional to the compression index
inversely proportional to the compression index
none of the above
Q.10
The angle that Coulomb’s failure envelope makes with the horizontal is called
cohesion
angle of internal friction
angle of repose
none of the above
Q.11
Which of the following is a measure of particle size range ?
effective size
uniformity coefficient
coefficient of curvature
none of the above
Q.12
Sand particles are made of
rock minerals
kaolinite
illite
montmorillonite
Q.13
If the sand in-situ is in its densest state, then the relative density of sand is
zero
1
between 0 and 1
greater than 1
Q.14
A soil has a bulk density of 22 kN/m3 and water content 10 %. The dry density of soil is
18.6 kN/m3
20.0 kN/m3
22.0 kN/m3
23.2 kN/m3
Q.15
Coefficient of earth pressure at rest is
less than active earth pressure but greater than passive earth pressure
greater than active earth pressure but less than passive earth pressure
greater than both the active earth pressure and passive earth pressure
less than both the active and passive earth pressures
Q.16
Effective stress is
the stress at particles contact
a physical parameter that can be measured
important because it is a function of engineering properties of soil
all of the above
Q.17
In the plate loading test for determining the bearing capacity of soil, the size of square bearing plate should be
less than 300 mm
between 300 mm and 750 mm
between 750 mm and 1 m
greater than 1 m
Q.18
Uniformity coefficient of a soil is
always less than 1
always equal to 1
equal to or less than 1
equal to or gi eater than 1
Q.19
Coefficient of consolidation of a soil is affected by
compressibility
permeability
both compressibility and permeability
none of the above
Q.20
The ratio of volume of voids to the total volume of soil mass is called
air content
porosity
percentage air voids
voids ratio
Q.21
When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as
negative
zero
non-plastic (NP)
1
Q.22
Voids ratio of a soil mass can
never be greater than unity
be zero
take any value greater than zero
take values between 0 and 1 only
Q.23
The clay mineral with the largest swelling and shrinkage characteristics is
kaolinite
illite
montmorillonite
none of the above
Q.24
If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then
The liquid limit of soil always increases
The liquid limit of soil always decreases
The liquid limit of soil may increase
The liquid limit of soil may decrease
Q.25
According to Atterberg, the soil is said to be of medium plasticity if the plasticity index PI is
0 < PI < 7
7
17
PI>27
Q.26
If the permeability of a soil is 0.8 mm/sec, the type of soil is
gravel
sand
silt
clay
Q.27
A tri-axial shear test is preferred to direct shear test, because
It can be performed under all three drainage conditions with complete control
Precise measurement of pore pressure and change in volume during test, is not possible
Stress distribution on the failure plane, is non uniform
None of these
Q.28
Contact pressure beneath a rigid footing resting on cohesive soil is
less at edges compared to middle
more at edges compared to middle
uniform throughout
none of the above
Q.29
Which of the following methods is most accurate for the determination of the water content of soil ?
oven drying method
sand bath method
calcium carbide method
pycnometer method
Q.30
The maximum dry density upto which any soil can be compacted depends upon
moisture content only
amount of compaction energy only
both moisture content and amount of compaction energy
none of the above
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