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. 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

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. 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

4 / 30

4. The specific gravity of sandy soils/gravel is

a) <1.5

b) <2.0

c) >2.0

d) >2.5

5 / 30

5. In the case of retaining walls, surcharge is:

a) Excess moisture in wall

b) Extra load on the wall

c) Additional load carrying capacity of wall

d) Extra load on the horizontal backfill

6 / 30

6. In soil if the water content is equal to the liquid limit, its relative consistency is

a) 1

b) 10

c) 5

7 / 30

7. The shear strength of a soil is proportional

a) Directly to the angle of internal friction

b) Directly to the tangent of the angle of internal friction

c) Inversely to the angle of internal friction

d) None of the above

8 / 30

8. Degree of saturation of a soil is generally

a) Above 100%

b) Below zero

c) Between 0% and 100%

d) None of the above

9 / 30

9. A plane inclined at an angle to the horizontal at which the soil is expected to stay in the absence of any lateral support is known as:

a) Natural slope line

b) The stable line

c) Repose line

d) All of the above

10 / 30

10. In a flow net, which of the following statements is true?

a) Flow lines and equipotential lines intersect at oblique angles

b) Flow lines and equipotential lines intersect orthogonally

c) Flow rate through each flow channel is different

d) The head along each flow line is constant

11 / 30

11. 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

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. 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

14 / 30

14. The ultimate bearing capacity of frictionless soils is:

a) 4.5c to 6c

b) 2c to 4c

c) 1c to 3c

d) 2c to 5c

15 / 30

15. Raising of water table in shallow foundations, near foundation level:

a) Reduces bearing capacity

b) Increases bearing capacity

c) Does not affect bearing capacity

d) Increases and then decreases bearing capacity

16 / 30

16. The difference between plastic limit and shrinkage limit is called

a) Fluidity index

b) Relative consistency

c) Plasticity index

d) Shrinkage index

17 / 30

17. In an earthen dam, the phreatic line is

a) Straight line

b) Circular line

c) Parabolic

d) Zigzag

18 / 30

18. 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

19 / 30

19. Square root of times fitting method is used for calculating

a) Compression index

b) Coefficient of consolidation

c) Coefficient of compressibility

d) Coefficient of volume compressibility

20 / 30

20. The pressure-void ratio curve will be

a) Linear when plotted on ordinary paper

b) Linear when plotted on semi-log paper

c) Linear when plotted on log-log paper

d) None of the above

21 / 30

21. 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

22 / 30

22. The bearing capacity factors (N_c, N_q,) and (N_r) are functions of:

a) Cohesion only

b) Angle of internal friction

c) Both (a) and (b) of above

d) None of the above

23 / 30

23. The water content of soils can be accurately determined by

a) Calcium carbide

b) Sand bath

c) Alcohol method

d) Oven drying method

24 / 30

24. 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

25 / 30

25. The permissible settlement in the case of an isolated foundation on clayey soils is:

a) 25 mm

b) 45 mm

c) 65 mm

d) 85 mm

26 / 30

26. The seepage force is proportional to

a) Exit gradient

b) Head of water at upstream

c) Head of water at downstream

d) None of the above

27 / 30

27. 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

28 / 30

28. Over-consolidated soils caused due to:

a) erosion of overburden

b) melting of ice sheets after glaciations

c) permanent rise of water table

d) all of the above

29 / 30

29. The bottom plug in well foundation is used:

a) To seal off the water

b) For stable resting

c) To transfer load from the steining to the soil

d) Create a working place in the well

30 / 30

30. Void ratio, e, of a soil can

a) Never be greater than one

b) Be equal to zero

c) Be greater than zero

d) Be between 0 and 1

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