flow condition occurring in cohesionless soils

flow condition occurring in cohesive soils

flow condition occurring in both cohesive and cohesionless soils

Practice Soil Mechanics And Foundation Multiple Choice Questions Quiz-4

Q.1

Hydrometer readings are corrected for:

Temperature correction
Meniscus correction
Dispersing agent correction
Temperature, meniscus and dispersing agent corrections

Q.2

During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm² to 0.26 N/mm², the pore water pressure increases from 0.07 N/mm² to 0.15 “N/mm². Skempton’s pore pressure parameter B is

0.5
-0.5
2.0
-2.0

Q.3

Inorganic soils with low compressibility are represented by

Q.4

Select the correct statement.

The greater the viscosity, the greater is permeability.
The greater the unit weight, the greater is permeability.
The greater the unit weight, the smaller is permeability.
Unit weight does not affect per-meability.

Q.5

Select the correct statement.

Unit weight of dry soil is greater than unit weight of wet soil.
For dry soils, dry unit weight is less than total unit weight.
Unit weight of soil increases due to submergence in water.
Unit weight of soil decreases due to submergence in water.

Q.6

If the shearing stress is zero on two planes, then the angle between the two planes is

45°
90°
135°
225°

Q.7

Allowable bearing pressure for a foundation depends upon

allowable settlement only
ultimate bearing capacity of soil only
both allowable settlement and ultimate bearing capacity
none of above

Q.8

The shear strength of a soil

Is directly proportional to the angle of internal friction of the soil
Is inversely proportional to the angle of internal friction of the soil
Decreases with increase in normal stress
Decreases with decrease in normal stress

Q.9

Bishop’s method of stability analysis

is more conservative
neglects the effect of forces acting on the sides of the slices
assumes the slip surface as an arc of a circle
all of the above

Q.10

The water content of soil, which represents the boundary between plastic state and liquid state, is known as

liquid limit
plastic limit
shrinkage limit
plasticity index

Q.11

Highway Research Board (HRB) classification of soils is based on

particle size composition
plasticity characteristics
both particle size composition and plasticity characteristics
none of the above

Q.12

Coarse grained soils are best compacted by a

drum roller
rubber tyred roller
sheep’s foot roller
vibratory roller

Q.13

A plane inclined at an angle ‘φ’ to the horizontal at which the soil is expected to stay in the absence of any lateral support, is known as

Natural slope line
Repose line
The φ line
All the above

Q.14

Quick sand is a

type of sand
flow condition occurring in cohesive soils
flow condition occurring in cohesionless soils
flow condition occurring in both cohesive and cohesionless soils

Q.15

Select the incorrect statement.

In a direct shear box test, the plane of shear failure is predetermined
Better control is achieved on the drainage of the soil in a tri-axial compression test
Stress distribution on the failure plane in the case of tri-axial compression test is uniform
Unconfined compression test can be carried out on all types of soils

Q.16

Select the correct statement.

A uniform soil has more strength and stability than a non-uniform soil.
A uniform soil has less strength and stability than a non-uniform soil.
Uniformity coefficient does not affect strength and stability.
Uniformity coefficient of a poorly graded soil is more than that of a well graded soil.

Q.17

Terzaghi’s theory of one dimensional consolidation assumes

Soil is homogeneous and fully saturated
Water and soil particles are incompressible
Deformation of the soil, is entirely due to change in volume
All the above

Q.18

Time factor for a clay layer is

a dimensional parameter
directly proportional to permeability of soil
inversely proportional to drainage path
independent of thickness of clay layer

Q.19

Shear strength of a soil is a unique function of

effective stress only
total stress only
both effective stress and total stress
none of the above

Q.20

Select the incorrect statement.

Bearing capacity of a soil depends upon the amount and direction of load.
Bearing capacity of a soil depends on the type of soil.
Bearing capacity of a soil depends upon shape and size of footing.
Bearing capacity of a soil is indepen-dent of rate of loading.

Q.21

Select the correct statement.

coefficient of compressibility of an over-consolidated clay is less than that of a normally consolidated clay
coefficient of compressibility of an over-consolidated clay is greater than that of a normally consolidated clay
coefficient of compressibility is cons-tant for any clay
none of the above

Q.22

Select the incorrect statement.

Effective cohesion of a soil can never have a negative value.
Effective angle of internal friction for coarse grained soils is rarely below 30°
Effective angle of internal friction for a soil increases as state of compact-ness increases.
Effective angle of internal friction is a complicated function of mineralogy and clay size content.

Q.23

Which of the following statements is correct?

Uniformity coefficient represents the shape of the particle size distribution curve.
For a well graded soil, both uniformity coefficient and coefficient of curvature are nearly unity.
A soil is said to be well graded if it has most of the particles of about the same size
none of the above

Q.24

In a consolidated drained test on a normally consolidated clay, the volume of the soil sample during shear

decreases
increases
remains unchanged
first increases and then decreases

Q.25

Pick up the correct statement from the following:

The dry density reduces by addition of water after attaining optimum moisture content
The line joining the peak of three moisture content graphs obtained by using three compactive energies, is called line of optimus
Well graded coarse grained soils can be compacted to a very high density as compared to fine grained soils
All the above

Q.26

Pick up the correct statement from the following:

The object of classifying soils is to arrange them into groups according to their properties and behaviour
A soil classification system is meant to provide an accepted and systematic method of describing the various types of soils eliminating personal factors
The first category of soil classification is based on grain size of the soil
All the above

Q.27

Coefficient of compressibility is

constant for any type of soil
different for different types of soils and also different for a soil under different states of consolidation
different for different types of soils but same for a soil under different states of consolidation
independent of type of soil but depends on the stress history of soil

Q.28

If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is

40%
60%
80%
100%

Q.29

Water content of soil can

never be greater than 100 %
take values only from 0 % to 100 %
be less than 0 %
be greater than 100 %

Q.30

Compressibility of sandy soils is

almost equal to that of clayey soils
much greater than that of clayey soils
much less than that of clayey soils
none of the above

Hydrometer readings are corrected for:

During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm² to 0.26 N/mm², the pore water pressure increases from 0.07 N/mm² to 0.15 “N/mm². Skempton’s pore pressure parameter B is

Inorganic soils with low compressibility are represented by

Select the correct statement.

Select the correct statement.

If the shearing stress is zero on two planes, then the angle between the two planes is

Allowable bearing pressure for a foundation depends upon

The shear strength of a soil

Bishop’s method of stability analysis

The water content of soil, which represents the boundary between plastic state and liquid state, is known as

Highway Research Board (HRB) classification of soils is based on

Coarse grained soils are best compacted by a

A plane inclined at an angle ‘φ’ to the horizontal at which the soil is expected to stay in the absence of any lateral support, is known as

Quick sand is a

Select the incorrect statement.

Select the correct statement.

Terzaghi’s theory of one dimensional consolidation assumes

Time factor for a clay layer is

Shear strength of a soil is a unique function of

Select the incorrect statement.

Select the correct statement.

Select the incorrect statement.

Which of the following statements is correct?

In a consolidated drained test on a normally consolidated clay, the volume of the soil sample during shear

Pick up the correct statement from the following:

Pick up the correct statement from the following:

Coefficient of compressibility is

If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is

Water content of soil can

Compressibility of sandy soils is

0 h : 0 m : 1 s

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