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 ratio of plasticity index to clay fraction is known as

a) Activity ratio or number

b) Flow index

c) Liquidity index

d) Toughness index

2 / 30

2. Compaction of soil is aimed at

a) Decreasing dry density

b) Increasing porosity

c) Decreasing void ratio

d) Decreasing shear strength

3 / 30

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

a) Ultimate load on the bearing area

b) Load intensity beyond which the soil should not be loaded

c) Load at which the soil fails

d) Load beyond which the soil yields

4 / 30

4. 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

5 / 30

5. The strength of a soil is generally identified by

a) Direct tensile stress

b) Net stress

c) Ultimate shear stress

d) Direct ultimate compressive stress

6 / 30

6. In cohesive soils, the depth of the vertical cut up to which no lateral support is required is given by:

a) 2c/γ

b) 4c/γ

c) 2γ/c

d) 4γ/c

7 / 30

7. Weathering of soils is caused by

a) Periodical temperature changes

b) Impact and splitting action of flowing water

c) Impact and splitting action of plants and animals

d) All of the above

8 / 30

8. Raft foundation is a type of:

a) Deep foundation

b) Shallow foundation

c) Foundation under water

d) None of the above

9 / 30

9. A foundation may be classified as spread foundation if:

a) Depth to width ratio is more than 2

b) Depth to width ratio is less than 2

c) Length to width ratio is more than 2

d) Length to width ratio is between 1 and 2

10 / 30

10. The density of soil can be increased by

a) By reducing the air voids

b) By elastic compression of soil grains

c) By expelling water from soil pores

d) All of the above

11 / 30

11. The position of the backfill lies above a horizontal plane at the elevation of the top of the structure is known as:

a) Surcharge

b) Surcharge angle

c) Extra load

d) Failure load

12 / 30

12. 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

13 / 30

13. The well in well foundation:

a) Is normally left empty

b) Filled with earth and consolidated

c) Filled with water

d) Filled with sand and consolidated on

14 / 30

14. *Earth pressure acting at a height of ..... in case of inclined surcharge is:

a) h/2 from the base of the wall

b) h/3 from the base of the wall

c) h/4 from the base of the wall

d) h/5 from the base of the wall

15 / 30

15. "If Nf, Nd, and H are the total flow channels, the total number of potential drops and total hydraulic head difference, respectively, the discharge, q, through the complete flow is given by

a) q = √H(Nf/Nd)

b) q = KH(Nd/Nf)

c) q = KH(Nf/Nd)

d) q = KH√(Nf/Nd)

16 / 30

16. If the volume of voids is equal to the volume of solids in a soil mass, then the values of porosity and voids ratio, respectively, are:

a) 1.0 and 0.0

b) 0.0 and 1.0

c) 0.5 and 1.0

d) 1.0 and 0.5

17 / 30

17. A foundation may be classified as continuous foundation if:

a) Depth to width ratio is more than 2

b) Length to width ratio is more than 2

c) Depth to width ratio is equal to 2

d) Length to width ratio is less than 2

18 / 30

18. The angle of internal friction of clay is about

a) 5-20°

b) 24-30°

c) 27-33°

d) 30-35°

19 / 30

19. 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 which may be inclined or horizontal

c) Back of the wall is vertical and smooth

d) All of the above

20 / 30

20. Consolidation is a process involving

a) Sudden compression of soil

b) Tilting and failure of the structure

c) Abnormal sinking of foundation

d) Gradual expulsion of pore water

21 / 30

21. A clay deposit subjected to pressure in the past which is more than the present overburden pressure is known as

a) Normally consolidated soil

b) Overconsolidated soil

c) Underconsolidated soil

d) None of the above.

22 / 30

22. The reduction factor to the bearing capacity of soil due to the water table at a depth equal to the width of the footing below the footing is:

a) 0.25

b) 0.50

c) 0.75

d) 1.00

23 / 30

23. Plasticity needle/Proctor needle is used to determine

a) Plastic limit of the soil used in compaction

b) Penetration resistance to control field compaction

c) Penetration value of bitumen used in road construction

d) Swelling index of black cotton soil

24 / 30

24. Bleeder wells are required to

a) Increase discharge from the main well

b) Store drainage water

c) Collect seepage water in dams

d) Relieve pressure in impervious layers

25 / 30

25. 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

26 / 30

26. Electrical analogy method is used to

a) Find electrical conductivity of soil

b) Draw flow net

c) Find the depth to the water table

d) Find the water content in a soil

27 / 30

27. If the sand in situ is in the densest state, then its relative density is

a) Equal to zero

b) Equal to one

c) Between 0 and 1

d) Greater than 1

28 / 30

28. The difference of the range of water between liquid limit and plastic limit is called

a) Fluidity index

b) Relative consistency

c) Shrinkage index

d) Plasticity index

29 / 30

29. The minimum depth of the building foundation in:

a) Sandy soil is 80 cm to 100 cm

b) Clay soils is 90 cm to 160 cm

c) Rocky soils is 5 cm to 50 cm

d) All of the above

30 / 30

30. Inorganic soils with low plasticity are denoted by

a) ML

b) CH

c) MH

d) SH

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Soil Mechanics Online Test – Paper 2

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