Foundation Engineering Civil Engineering Questions - Set 13 - ObjectiveBooks

Foundation Engineering Civil Engineering Questions - Set 13

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

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