Soil Mechanics Online Test - Paper 2

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Vikash chaudhary

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Total Questions: 30
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1 / 30

1. The triaxial apparatus is usually used for

a) Unconsolidated-untrained test

b) Consolidated-untrained test

c) Drained test

d) All of the above

2 / 30

2. In Rankine's earth pressure theory, the following assumption is made:

a) Wall face is rough and vertical

b) Backfill is cohesive soil

c) Wall face is smooth and vertical

d) Elastic equilibrium is satisfied

3 / 30

3. Earth pressure at rest can be defined as lateral pressure exerted by the soil when the retaining wall tends to

a) Move away from the backfill

b) No movement relative to the backfill

c) Move into the soil

d) All of the above

4 / 30

4. Active earth pressure is

a) Always less than passive earth pressure

b) Always greater than passive earth pressure

c) Sometimes greater than passive earth pressure

d) Equal to passive earth pressure

5 / 30

5. The dry density of soil can be defined as

a) Weight of solids to the total volume of the soil

b) Weight of the soil to the volume of the soil

c) Unit weight of the soil to the unit weight of water

d) None of the above

6 / 30

6. The principal stress is maximum on

a) Minor principal plane

b) Intermediate principal plane

c) Major principal plane

d) None of these

7 / 30

7. The maximum differential settlement in the case of a foundation on clayey soils is:

a) 10 mm

b) 20 mm

c) 30 mm

d) 40 mm

8 / 30

8. The coefficient of earth pressure for loose sand having an angle of internal friction of 30° is:

a) 0.5

b) 1/3

c) 3

d) 1

9 / 30

9. Combined footing is generally used when:

a) Number of columns are more than two and are spaced far apart

b) Number of columns are two and are spaced close to each other

c) Number of columns are two and are spaced far apart

d) None of the above

10 / 30

10. The maximum pressure which a soil can carry without shear failure is called:

a) Safe bearing capacity

b) Net ultimate bearing capacity

c) Net bearing capacity

d) Ultimate bearing capacity

11 / 30

11. If the soil stays at a place above the parent rock where it is produced, then it is called

a) Stationary soil

b) Static soil

c) Residual soil

d) Immobile soil

12 / 30

12. 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

13 / 30

13. Generally, soils are considered as

a) Single-phase system

b) Two-phase system

c) Three-phase system

d) None of the above

14 / 30

14. The curve A, B, and C shown in fig below are respectively the stress-strain curves for stress of

a) Dense sand, clay, and loose sand

b) Dense sand, loose sand, and clay

c) Loose sand, dense sand, and clay

d) Clay, loose sand, and dense sand

15 / 30

15. The bearing capacity of soil primarily depends on:

a) Depends on the size of the footing

b) Load intensity

c) Depends on the load

d) Rate of loading

16 / 30

16. The process of improving the engineering properties of the soil and thus making it more stable is known as

a) Compaction

b) Consolidation

c) Stabilization

d) None of the above

17 / 30

17. Compared to dry backfill, submerged backfill will exert:

a) Same earth pressure

b) Less earth pressure

c) More earth pressure

d) Terzaghi

18 / 30

18. The assumption of Coulomb's theory is:

a) Backfill is dry, homogeneous, isotropic, and cohesionless

b) Rupture plane is linear and passes through the toe of the wall

c) Sliding wedge acts as a rigid body, and the value of earth pressure is obtained by considering the equilibrium of the wedge

d) All of the above

19 / 30

19. The bulk density of soil can be defined as

a) Ratio of the weight of the solids to the volume of solids

b) Ratio of unit weight of soil to that of water

c) Unit weight of soil

d) Unit weight of soil under saturated condition

20 / 30

20. The saturated density of soil can be expressed as

a) Weight of soil in water to its volume

b) Weight of soil minus weight of equivalent water to volume of soil

c) Weight of soil less weight of water in voids to the volume of solids plus voids in the soil

d) Unit weight of saturated soil

21 / 30

21. Saturated soil is concerned with

a) Two-phase system

b) Three-phase system

c) One-phase system

d) All of the above

22 / 30

22. The critical exit gradient may occur when

a) Flow is in an upward direction

b) Seepage pressure is in an upward direction

c) Effective pressure is zero

d) All of the above

23 / 30

23. Berms are used to:

a) Increase the weight of the dam

b) Reduce seepage losses

c) Increase shear strength

d) Increase factor of safety

24 / 30

24. The shear strength of a soil is

a) Directly proportional to the cohesion of soil

b) Directly proportional to the angle of friction of the soil

c) Directly proportional to the normal stress

d) All of the above

25 / 30

25. * A 'shear stress' is a stress which is applied.......to a face of material.

a) Perpendicularity

b) Parallel

c) Softly

d) With a bang

26 / 30

26. The load-carrying capacity of the pile is............due to skin friction.

a) Increases

b) Decreases

c) Constant

d) None of the above

27 / 30

27. The structure that derives its stability due to self-weight is:

a) Sheet pile wall

b) Bulkhead

c) Cantilever retaining wall

d) Masonry retaining wall

28 / 30

28. The neutral stress in a soil mass is

a) Force per neutral area

b) Force per unit effective area of the soil

c) Stress shared by the particles of the soil

d) Stress shared by the pore water

29 / 30

29. For the determination of shear strength in the laboratory, the tests done are

a) Triaxial shear test

b) Direct shear test

c) All of the above

d) Unconfined shear test

30 / 30

30. The angle of internal friction depends upon

a) Particle shape and roughness

b) Normal direct pressure

c) The amount of interlocking

d) All of the above

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Soil Mechanics Online Test – Paper 2

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