Practice Test: Question Set - 13
1. Over-consolidation of soils is caused due to
- (A) Erosion
of over burden
- (B) Melting
of ice sheets after glaciations
- (C) Permanent
rise of water table
- (D) All the
above
2. The consistency index of a soil is defined as the ratio of
- (A) Liquid
limit plus the natural water content to the plasticity index of the soil
- (B) Liquid limit
minus the natural water content to the plasticity index of the soil
- (C) Natural
water content of a soil minus plastic limit to the plasticity index of the soil
- (D) Natural
water content of a soil plus its plastic limit to the plasticity index of the
soil
3. Which of the following types of soil is transported by gravitational forces?
- (A) Loess
- (B) Talus
- (C) Drift
- (D) Dune sand
4. Soil classification of composite soils, exclusively based on the particle size distribution, is known
- (A) Particle
classification
- (B) Textural
classification
- (C) High
Way Research Board classification
- (D) Unified
soil classification
5. The coefficient ka of the active earth pressure, is given by
- (A) ka = (1 - tan φ)/(1 + tan φ)
- (B) ka = (1 + tan φ)/(1 - tan φ)
- (C) ka = (1 + sin φ)/(1 - sin φ)
- (D) ka = (1 - sin φ)/(1 + sin φ)
6. When the degree of saturation is zero, the soil mass under consideration represents
- (A) One phase system
- (B) Two phase system with soil and air
- (C) Two phase system with soil and water
- (D) Three phase system
7. The active earth pressure of a soil is proportional to (where φ is the angle of friction of the soil)
- (A) tan (45° - φ)
- (B) tan2 (45° + φ/2)
- (C) tan2 (45° - φ/2)
- (D) tan (45° + φ)
8. Pick up the cohesive soil from the following:
- (A) Red earth
- (B) Clay
- (C) Black cotton
soil
- (D) Compacted
ground
9. For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass?
- (A) Oven drying method
- (B) Sand bath method
- (C) Alcohol method
- (D) Calcium carbide method
10. The internal molecular attraction of a soil, the cohesion
- (A) Decreases
as the moisture content increases
- (B) Increases
as the moisture content decreases
- (C) Is more in
well compacted clays
- (D) Depends
upon the external applied load
11. Which of the following is a measure of particle size range?
- (A) Effective size
- (B) Uniformity coefficient
- (C) Coefficient of curvature
- (D) None of the above
12. If Nf, Nd and H are total number flow channels, total number of potential drops and total hydraulic head differences respectively, the discharge q through the complete flow is given by (where K is a constant)
- (A) q = √H
(Nf/Nd)
- (B) q = KH
(Nd/(Nf)
- (C) q = KH
(Nf/Nd)
- (D) q = KH
√(Nf/Nd)
13. A failure wedge develops if a retaining wall
- (A) Moves
away from the backfill
- (B) Moves
towards the backfill
- (C) Sinks
downwards
- (D) Stresses
equally by vertical and horizontal forces
14. The admixture of coarser particles like sand or silt to clay causes
- (A) Decrease in liquid limit and increase in
plasticity index
- (B) Decrease in liquid limit and no change in
plasticity index
- (C) Decrease in both liquid limit and plasticity index
- (D) Increase in both liquid limit and plasticity index
15. A partially saturated sample of soil has a unit weight of 2.0 g/cm3 and specific gravity of soil particles is 2.6. If the moisture content in the soil is 20%, the degree of saturation is
- (A) 20 %
- (B) 77 %
- (C) 92 %
- (D) None of
these