Q.1

Failure of a slope occurs only when total shear force is

  • equal to total shearing strength
  • greater than total shearing strength
  • less than total shearing strength
  • none of these.
Q.2

The inventor of the term soil mechanics, was

  • Kray
  • Dr. Karl Terzaghi
  • Leygue
  • Fellenius.
Q.3

Sedimentation analysis is based on the assumption:

  • soil particles are spherical
  • particles settle independent of other particles
  • walls of the jar do not affect the settlement .
  • all the above.
Q.4

Pick up the correct definition from the following:

  • The lateral pressure exerted by the soil when the retaining wall moves away from the back fill, is generally known as active earth pressure of the soil
  • The lateral pressure exerted by the soil when the retaining wail moves towards the soil, is generally known as 'Passive earth pressure of the soil'
  • The lateral pressure exerted by the soil when the retaining wall has no movement relative to the back fill, is known as 'earth pressure at rest of the soil'
  • All the above.
Q.5

The length/diameter ratio of cylindrical specimens used in triaxial test, is generally

  • 1
  • 1.5
  • 2
  • 2.5
  • 3
Q.6

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.7

The critical exist gradient of seepage water in soils, increases with

  • an increase in specific gravity
  • a decrease in specific gravity
  • a decrease in void ratio
  • both (a) and (c)
  • none of these.
Q.8

A soil sample of mass specific gravity 1.has a moisture content 30%. If the specific gravity of solids is 2.the void ratio, is

  • 0.858
  • 0.860
  • 0.862
  • 0.864
Q.9

In a fow net

  • flow lines and equipotential lines cross each other at right angles
  • fields are rectangles whose length is twice the breadth
  • smaller the dimensions of the field, smaller will be the hydraulic gradient and velocity of flow through it
  • for homogeneous soil, the curves are smooth and circular.
Q.10

A direct shear test possesses the following disadvantage:

  • A relatively thin thickness of sample permits quick drainage
  • A relatively thin thickness of sample permits quick dissipation of pore pressure developed during the test
  • As the test progresses the area under shear, gradually changes
  • none of these.
Q.11

For a base failure of a slope, depth factor

  • Df = 1
  • Df < 1
  • Df > 1
  • none of these.
Q.12

Pick up the correct statement from the following:

  • When stress decreases, void, ratio decreases
  • When stress decreases, coefficient of permeability decreases
  • When stress decreases, coefficient of volume change decreases
  • When stress decreases void ratio, co-effi-cients of per-meability and volume change decrease.
Q.13

If voids ratio is 0.water content is 0.and specific gravity is 2.the degree of saturation of the soil, is

  • 25%
  • 40%
  • 60%
  • 75%
Q.14

The intensity of active earth pressure at a depth ofmetres in dry cohesionless sand with an angle of internal friction ofand with a weight of 1.8 t/m3, is

  • 4 t/m2
  • 5 t/m2
  • 6 t/m2
  • 7 t/m2
  • 8 t/m2
Q.15

Hydrometer readings are corrected for:

  • temperature correction
  • meniscus correction
  • dispersing agent correction
  • meniscus and dispersing agent corrections
  • temperature, meniscus and dispersing agent corrections.
Q.16

Pick up the correct statement from the following:

  • A soil having pH value more than 7 is an acidic soil
  • A soil having pH value less than 7 is an acidic soil
  • A soil having pH value more than 7 is an alkaline soil
  • A soil containing chemicals for the manufacture of portland cement is preferred.
Q.17

Compression of soil occurs rapidly if voids are filled with

  • air
  • water
  • partly with air and partly with water
  • none of these.
Q.18

The maximum pressure which a soil can carry without shear failure, is called

  • safe bearing capacity
  • net safe bearing capacity
  • net ultimate bearing capacity
  • ultimate bearing capacity.
Q.19

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
  • The second category of soil classification is based on fine as well as coarse grains
  • All the above.
Q.20

Pick up the correct statement from the following:

  • In hydrometer method, weight Wd per ml of suspension is found directly
  • In pipette analysis, weight Wd per ml of suspension is found indirectly
  • In pipette analysis, weight Wd per ml of suspension is found directly
  • None of these.
Q.21

Tergazhi's theory of one dimensional consolidation assumes

  • load is applied in one direction
  • coefficient of permeability is constant
  • excess pore water drains out only in the vertical direction
  • time lag in consolidation is due entirely to permeability
  • all the above.
Q.22

The ratio of the weight of water to the weight of solids in a given mass of soil, is known

  • porosity
  • specific gravity
  • void ratio
  • water content.
Q.23

The ratio of the volume of water present in a given soil mass to the total volume of its voids, is known

  • porosity
  • void ratio
  • percentage voids
  • degree of saturation.
Q.24

Through a point in a loaded soil mass, there exists n typical planes mutually orthogonal on which the stress is wholly normal and no shear stress acts, if n is

  • 1
  • 2
  • 3
  • 4
Q.25

A critical hydraulic gradient may occur when

  • flow is in upward direction
  • seepage pressure is in upward direction
  • effective pressure is zero
  • all the above.
Q.26

Chemical weathering of soil is caused due to

  • oxidation
  • carbonation
  • hydration
  • leaching
  • all the above.
Q.27

If water content of a soil is 40%, G is 2.and void ratio is 1.the degree of saturation is

  • 70%
  • 75%
  • 80%
  • 85%
  • 90%
Q.28

On wetting, cohesive soils,

  • loose permeability
  • gain shear strength
  • loose elasticity
  • decrease their shear strength.
Q.29

The compressibility of clays, is caused due to:

  • expulsion of double layer water from in between the grains
  • sliping of particles to new positions of greater density
  • bending of particles as elastic sheets
  • all the above.
Q.30

Tergazhi'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
  • Darcey's law for the velocity of flow of water through soil, is perfectly valid
  • all the above.
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