Soil Mechanics Online Test - Paper 2

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Vikash chaudhary

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Total Questions: 30
Time Allotted: 30 minutes
Passing Score: 50%
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1 / 30

1. The specific gravity of sandy soils/gravel is

a) <1.5

b) <2.0

c) >2.0

d) >2.5

2 / 30

2. Standard Proctor test is used for determining

a) Optimum moisture content (OMC)

b) Void ratio

c) Coefficient of consolidation

d) Pavement thickness

3 / 30

3. The ultimate B.C. of a soil can be defined as:

a) Ultimate load on the bearing area

b) Safe load on the bearing area

c) Load at which the soil fails

d) Load beyond which the soil should not be loaded

4 / 30

4. Cohesionless soils are formed due to

a) Oxidation of rocks

b) Leaching action of water on rocks

c) Blowing of hot and cold wind

d) Physical disintegration of rock

5 / 30

5. A soil that is fully consolidated under the existing overburden pressure is known as

a) Normally consolidated soil

b) Overconsolidated soil

c) Underconsolidated soil

d) None of the above

6 / 30

6. A clay deposit that is not fully consolidated under the existing overburden pressure is known as

a) Normally consolidated soil

b) Overconsolidated soil

c) Underconsolidated soil

d) None of the above

7 / 30

7. The degree of saturation, Sr, of soil in percentage has a value

a) Sr > 0

b) Sr ≤ 0

c) 0 < S < 100

d) 0 ≤ S ≤ 100

8 / 30

8. The basis for all soil classification systems is

a) Permeability characteristics

b) Specific gravity of solids

c) Grain size and plasticity characteristics

d) None of the above

9 / 30

9. The u/s face of an earthen dam is

a) An equipotential line

b) A phreatic line

c) A flow line

d) None of the above

10 / 30

10. Plasticity index is obtained as the difference between

a) Liquid limit and shrinkage limit

b) Shrinkage limit and plastic limit

c) Liquid limit and plastic limit

d) None of the above

11 / 30

11. The types of compaction suitable for cohesionless soil having large thickness are

a) Roller

b) Rammer

c) Vibrator

d) Vibrofloatation

12 / 30

12. An agent responsible for the transportation of soil is

a) Wind

b) Water

c) Gravity

d) All of the above

13 / 30

13. Saturated soil is concerned with

a) Two-phase system

b) Three-phase system

c) One-phase system

d) All of the above

14 / 30

14. The permeability of a soil deposit in situ can be best obtained by

a) Falling head permeameter

b) Constant head permeameter

c) Pumping test

d) None of the above

15 / 30

15. If the water content of a fully saturated soil mass is 100%, then the voids will be

a) Less than the specific gravity of soil

b) Equal to the specific gravity of soil

c) Greater than the specific gravity of soil

d) Independent of the specific gravity of soil

16 / 30

16. Base failure refers to a failure surface that:

a) Is above the toe of the slope

b) Includes the toe of the slope

c) Is below the toe of the slope

d) None of the above

17 / 30

17. The bearing capacity of a soil depends upon:

a) Size of the particles

b) Shape of the particles

c) Cohesive properties of particles

d) All of the above

18 / 30

18. Stability analysis shall be made considering:

a) Total stresses

b) Normal stresses

c) Effective stresses

d) Shear stresses

19 / 30

19. The critical exit gradient of the seepage of water in soils

a) Increases with a decrease in the specific gravity

b) Increases with an increase in the specific gravity

c) Decreases with an increase in the liquid limit

d) None of the above

20 / 30

20. The behavior of silt is normally governed by

a) Mass energy

b) Surface energy

c) Mass energy and surface energy

d) None of the above

21 / 30

21. The assumption of Rankine's theory of earth pressure is:

a) The soil is semi-finite, homogeneous, dry, and cohesionless

b) Ground surface is a plane that may be inclined or horizontal

c) The back of the wall is vertical and smooth

d) All of the above

22 / 30

22. Moisture content of saturated soil equals:

a) 0%

b) 100%

c) 50%

d) 90%

23 / 30

23. The angle between the directions of the failure and the major principal plane is equal to:

a) 90° + effective angle of shearing resistance

b) 90° + half of the angle of shearing resistance

c) 45° + half of the angle of shearing resistance

d) 45° - half of the angle of shearing resistance

24 / 30

24. The degree of saturation in soils can be defined as the ratio of

a) Water by weight to the dry soil weight

b) Volume of water to the gross volume of soil

c) Volume of water to volume of voids in soil

d) Weight of the water to weight of the soil

25 / 30

25. The well foundation is normally used under:

a) Industrial buildings

b) Structures on river beds

c) Tall buildings

d) Offshore wells

26 / 30

26. If the resultant force at the bottom of the retaining wall lies outside the middle third, the failure will be due to:

a) Crushing

b) Sliding

c) Upthrust

d) Overturing

27 / 30

27. The relation between dry density (ρd), bulk density (ρ), and water content (w) is

a) ρ = ρd / (1 + w)

b) ρd = ρ / (1 + w)

c) w = ρ / (1 + ρd)

d) w = ρd / (1 + ρ)

28 / 30

28. Cohesionless soil is

a) Sand

b) Silt

c) Clay

d) Clay and silt

29 / 30

29. In an earthen dam, the phreatic line is

a) Straight line

b) Circular line

c) Parabolic

d) Zigzag

30 / 30

30. The critical exit gradient of the seepage of water in a soil is

a) (1-e) / (G-1)

b) (G+e) / (1+e)

c) (G-1)/(1+e)

d) None of the above

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Soil Mechanics Online Test – Paper 2

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