Q.1

The Terzaghi's general bearing capacity equation for a continuous footing is given by (where Nc, 2V& and Ny are bearing capacity factors.)

  • qf = cNc + γDNq + 0.5γBNγ
  • qf = cNc - γDNq + 0.5γBNγ
  • qf = cNc + γDNq - 0.5γBNγ
  • qf = cNc - γDNq - 0.5γBNγ
Q.2

Pick up the correct statement from the following:

  • The range of water content between the liquid limit and plastic limit, is called plasticity index.
  • The ratio of the liquid limit minus the natural water content to the plasticity index of soils, is called consistency index
  • The ratio of natural water content minus its plastic limit to its plasticity index is called liquidity index
  • The ratio between plasticity index and flow index (i.e. slope of flow curve in case of liquid limit), is called toughness index
  • All the above.
Q.3

The ratio of emax and emin of silty sand, is

  • 2.0
  • 5
  • 3.0
  • 3.5
  • 4.0
Q.4

Cohesive soils are generally

  • plastic and also compressible
  • elastic and also compressible
  • plastic but incompressible
  • none of these.
Q.5

The plasticity of fine soils may be assessed by means of

  • dry strength test
  • toughness test
  • dilatancy test
  • all of these.
Q.6

The specific gravity of Calcite is

  • 2.65
  • 2.72
  • 2.85
  • 2.90
Q.7

Coulomb's wedge theory assumes that

  • back fill is dry, cohesionless, homogeneous and isotropic
  • slip surface is the plane which passes through the heel of the wall
  • sliding wedge itself acts as a rigid body and the value of earth pressure is obtained by considering the limiting equilibrium of the wedge
  • position and direction of the resultant earth pressure, are known
  • all the above.
Q.8

A saturated soil sample has water content ofand specific gravity of soil particles 2.The void ratio of the soil, is

  • 0.4
  • 0.52
  • 1.08
  • none of these.
Q.9

A soil mass is said to be in plastic equilibrium if

  • it is stressed to maximum
  • it is on the verge of failure
  • it is in plastic stage
  • it starts flowing.
Q.10

A soil mass coated with a thin layer of paraffin weighsg. When immersed, it displacescc of water. The weight of paraffin isg. If specific gravity of solids is 2.5 and that of paraffin 0.the void ratio of soil, is

  • 0.55
  • 0.60
  • 0.65
  • 0.70
Q.11

The slip at critical angle, is generally known

  • δ 1-line
  • rupture plane
  • slip plane
  • all the above.
Q.12

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

  • 95.4%
  • 95.5%
  • 95.6%
  • 95.7%
Q.13

A clay subjected to pressure in excess to its present over-burden, is said to be

  • pre-compressed
  • pre-consolidated
  • over-consolidated
  • all the above.
Q.14

'Talus' is the soil transported by

  • wind
  • water
  • glacier
  • gravitational force.
Q.15

A flow net may be utilised for the determination of

  • exit gradient
  • seepage
  • hydrostatic pressure
  • seepage pressure
  • all the above.
Q.16

A structure is erected on an impervious clay whose thickness ism. Drainage is possible both at upper and lower surfaces. Coefficient of consolidation is 0.cm2 per minute. For attainingconsolidation with a time factor 0.the number of days required

  • 3233
  • 3123
  • 33331
  • 3313
Q.17

If the coefficient of the active pressure Ka is 1/the coefficient of passive pressure Kp, is

  • 1/3
  • 2/3
  • 1
  • 3/2
  • 3
Q.18

The density of soil can be increased

  • by reducing the space occupied by air
  • by elastic compression of soil grains
  • by expelling water from pores
  • All the above.
Q.19

The ratio of volume of air voids to the volume of total voids, is known as

  • air content
  • percentage air voids
  • percentage voids
  • porosity.
Q.20

If dry density, water density and specific gravity of solids of a given soil sample are 1.6 g/cc, 1.g/cc and 2.respectively, the porosity of the soil sample, is

  • 0.375
  • 0.370
  • 0.380
  • 0.390
Q.21

For testing a saturated clay for shear strength, the test recommended, is

  • direct shear test
  • triaxial compression test
  • unconfined compression test
  • all the above.
Q.22

Pick up the correct statement from the following:

  • The permeability of the coarse-grained soils may be reduced by grouting.
  • The process of injecting fluids (i.e. grouts) into the pores space of the soil, is called grouting.
  • The grouting increases the soil strength.
  • All the above.
Q.23

Pick up the incorrect definition from the following:

  • Ratio of the compressive strength of unconfined undisturbed soil to that of remoulded soil, is known as the sensitivity of the soil sample
  • The rotation of soil particles into stable state while remoulding, is known as the thiostropy of soil
  • The water content at which a soil changes from the liquid state to solid state, is known liquid limit of the soil
  • The water content at which a soil flows, is known plastic limit of the soil
  • None of these.
Q.24

The property of a soil which allows it to be deformed rapidly without rupture, elastic rebound and also a volume change, is known

  • porosity
  • plasticity
  • permeability
  • ductility.
Q.25

The bearing capacity of a soil depends upon

  • size of the particles
  • shape of the particles
  • cohesive properties of particles
  • internal frictional resistance of particles
  • all the above.
Q.26

For slopes of limited extent the surface of slippage, is usually along

  • a parabolic arc
  • an elliptical arc
  • a straight line
  • a circular arc.
Q.27

A triaxial shear test is prefered to direct shear test, because

  • it can be performed under all three driange conditions with complete control
  • precise measurement of pore pressure and change in volume during test, is not posible
  • stress distribution on the failure plane, is non uniform
  • none of these.
Q.28

The neutral stress in a soil mass is

  • force per neutral area
  • force per effective area
  • stess taken up by the pore water
  • stress taken up by solid particles.
Q.29

Which one of the following statements is true for Mohr-Coulomb envelope ?

  • Coulomb suggests that the relationship between shear strength and normal stress, is adequately represented by the straight line
  • The generalised Mohr theory suggests that, though the shear stress depends on the normal stress, the relation is not linear
  • Coulomb and Mohr suggest that a definite relationship exists among the principal stress and the angle of internal friction
  • For an ideal pure friction material, the straight line passes through the origin.
  • All the above.
Q.30

The Mohr's straight theory is based on the following fact :

  • Material fails essentially by shear
  • Ultimate strength of the material is determined by the stress in the plane of slip
  • Failure criterion is independent of the intermediate principal stress
  • All the above.
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