Practice Test: Question Set - 07
1. If the coefficients of volume change and compressibility of a soil sample are respectively 6.75 × 10-2 and 3 × 10-2, the void ratio of the soil sample, is
- (A) 1.10
- (B) 1.15
- (C) 1.20
- (D) 1.30
2. When a cohesionless soil attains quick condition, it looses
- (A) Shear
strength
- (B) Bearing
capacity
- (C) Both (a) and
(b)
- (D) Neither (a)
nor (b)
3. Select the correct statement.
- (A) The greater the viscosity, the greater is permeability
- (B) The greater the unit weight, the greater is
permeability
- (C) The greater the unit weight, the smaller is
permeability
- (D) Unit weight does not affect permeability
4. A direct shear test possesses the following disadvantage:
- (A) A
relatively thin thickness of sample permits quick drainage
- (B) A
relatively thin thickness of sample permits quick dissipation of pore pressure
developed during the test
- (C) As
the test progresses the area under shear, gradually changes
- (D) None of
these
5. A stratum of clay 2 m thick will get consolidated 80% in 10 years. For the 80% consolidation of 8 m thick stratum of the same clay, the time required is
- (A) 100 years
- (B) 120 years
- (C) 140 years
- (D) 160 years
6. When the seepage pressure becomes equal to the pressure due to submerged weight of a soil, the effective pressure is reduced to zero and the soil particles have a tendency to move up in the direction of flow. This phenomenon is generally known
- (A) Quick
condition
- (B) Boiling
condition
- (C) Quick sand
- (D) All the
above
7. The most suitable method for drainage of fine grained cohesive soils is
- (A) Well point system
- (B) Vacuum method
- (C) Deep well system
- (D) Electro-osmosis method
8. Which one of the following statements is true for Mohr-Coulomb envelope?
- (A) Coulomb
suggests that the relationship between shear strength and normal stress, is
adequately represented by the straight line
- (B) The
generalised Mohr theory suggests that, though the shear stress depends on the
normal stress, the relation is not linear
- (C) Coulomb and
Mohr suggest that a definite relationship exists among the principal stress and
the angle of internal friction
- (D) All the
above
9. Fundamental relationship between dry density (γd), specific gravity (G), water content (ω) and percentage of air voids (na) is:
- (A) γd = (1
- na) G γω/(1
+ ωG)
- (B) γd = (1
+ na) G γω/(1
+ ωG)
- (C) γd = (1
+ na) G γω/(1
- ωG)
- (D) γd = (1
- na) G γω/(1
- ωG)
10. If drainage is permitted throughout the test, during the application of both normal, and shear stresses so that full consolidation occurs and no excess pore pressure is set up at any stage of the test, is known as
- (A) Quick test
- (B) Drained test
- (C) Consolidated
undrained test
- (D) None of
these
11. Degree of consolidation is
- (A) Directly proportional to time and inversely proportional
to drainage path
- (B) Directly proportional to time and inversely
proportional to square of drainage path
- (C) Directly proportional to drainage path and
inversely proportional to time
- (D) Directly proportional to square of drainage
path and inversely proportional to time
12. Terzaghi's theory of one dimensional consolidation assumes
- (A) Load
is applied in one direction
- (B) Coefficient
of permeability is constant
- (C) Excess pore
water drains out only in the vertical direction
- (D) All the
above
13. The shear resistance of a soil is constituted basically of the following component.
- (A) The
frictional resistance to translocation between the individual soil particles at
their contact point
- (B) To
the structural relation to displacement of the soil because of the interlocking
of the particles
- (C) Cohesion
and adhesion between the surfaces of the soil particles
- (D) All the
above
14. The consolidation time for soils
- (A) Increases
with increasing compressibility
- (B) Decreases
with increasing permeability
- (C) Increases
rapidly with increasing size of soil mass
- (D) All the
above
15. Coefficient of compressibility is
- (A) Constant for any type of soil
- (B) Different for different types of soils and also
different for a soil under different states of consolidation
- (C) Different for different types of soils but same for
a soil under different states of consolidation
- (D) Independent of type of soil but depends on
the stress history of soil