Soil Mechanics PYQs, GPSC Civil Engineering

1. The ratio of the volume of air voids to the volume of voids is called

B) Air Content

2. The degree of saturation for a fully saturated soil is

C) 1.00

3. The specific gravity of soil solids is determined by

A) Pycnometer method

4. The property of a soil which enables to regain its strength lost on remoulding in a short time without change of moisture content is called

C) Thixotrophy

5. The property of soil mass which permits the seepage of water through its interconnecting voids is called

B) Permeability

6. The coefficient of consolidation is used for evaluating

D) Time rate of settlement

7. The most suitable test for finding the shear strength of very plastic cohesive soils is

B) Penetration test

8. The earth pressure at rest is defined as the lateral pressure exerted by soil

B) when the retaining wall has no movement relative to the back fill

9. The size of the bearing plate which is used in a plate load test varies from

D) 300 to 750 mm

10. A flownet is drawn to obtain

(i) exit gradient

(ii) uplift pressure

(iii) coefficient of permeability

B) (i) and (ii)

11. With the increase in compaction energy in a compaction test

B) Maximum Dry Density increases and Optimum Moisture Content decreases

12. The shear strength in cohesionless soil is due to

C) Inter granular friction

13. The minimum water content at which the soil just begins to crumble when rolled into threads 3 mm in diameter, is known as

B) Plastic limit

14. Local shear failure is associated with soils having

A) High compressibility

15. Reduction in volume of soil primarily due to squeezing out of water from the voids is called

A) primary consolidation

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