Geotechnical Engineering MCQs Set-2

Page 1 of 4

1. Degree of consolidation is

directly proportional to drainage path and inversely proportional to time

directly proportional to time and inversely proportional to square of drainage path

directly proportional to time and inversely proportional to drainage path

directly proportional to square of drainage path and inversely proportional to time

2. Which of the following types of soil is transported by gravitational forces?

loess

talus

drift

dune sand

3. Coefficient of permeability of soil

increases with the decrease in temperature

increases with the increase in temperature

does not depend upon temperature

none of these

4. Shear strength of a soil is a unique function of

both effective stress and total stress

none of these

total stress only

effective stress only

5. Rankine's theory of earth pressure assumes that the back of the wall is

plane and smooth

vertical and rough

plane and rough

vertical and smooth

6. Cohesive soils are

none of these

poor for backfill because of large lateral pressure

good for backfill because of high shear strength

good for backfill because of low lateral pressure

7. Sand particles are made of

montmorillonite

illite

kaolinite

rock minerals

8. Residual soils are formed by

none of these

water

wind

glaciers

9. The clay mineral with the largest swelling and shrinkage characteristics

none of these

montmorillonite

kaolinite

illite

10. Unconfined compressive strength test is

undrained test

consolidated drained test

drained test

consolidated undrained test

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11. If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is

less than specific gravity of soil

equal to specific gravity of soil

independent of specific gravity of soil

greater than specific gravity of soil

12. Sensitivity of a soil can be defined as

percentage of volume change of soil under saturated condition

ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state

ratio of volume of voids to volume of solids

none of these

13. If the natural water content of soil mass lies between its liquid limit and plastic limit, the soil mass is said to be in

semi-solid state

plastic state

solid state

liquid state

14. The shear strength of a soil

decreases with decrease in normal stress

is directly proportional to the angle of internal friction of the soil

is inversely proportional to the angle of internal friction of the soil

decreases with increase in normal stress

15. At liquid limit, all soils possess

same shear strength of small magnitude

same shear strength of large magnitude

different shear strengths of large magnitude

different shear strengths of small magnitude

16. Coefficient of consolidation of a soil is affected by

permeability

compressibility

none of these

both compressibility and permeability

17. When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as

non-plastic (NP)

negative

zero

1

18. Inorganic soils with low compressibility are represented by

CH

ML

SL

MH

19. Stoke's law is valid only if the size of particle is

all of these

less than 0.0002 mm

between 0.2 mm and 0.0002 mm

greater than 0.2 mm

20. A pycnometer is used to determine

voids ratio and dry density

specific gravity and dry density

water content and voids ratio

water content and specific gravity

Page 3 of 4

21. Which of the following soils has more plasticity index?

gravel

sand

silt

clay

22. A fully saturated soil is said to be

two phase system with soil and air

two phase system with soil and water

one phase system

three phase system

23. Rate of consolidation

increases with increase in temperature

is independent of temperature

increases with decrease in temperature

is unaffected by permeability of soil

24. Which of the following is a measure of particle size range?

coefficient of curvature

uniformity coefficient

none of these

effective size

25. The effect of cohesion on a soil is to

reduce the active earth pressure intensity but to increase the passive earth pressure intensity

increase both the active earth pressure intensity and passive earth pressure intensity

reduce both the active earth pressure intensity and passive earth pressure intensity

increase the active earth pressure intensity but to reduce the passive earth pressure intensity

26. Highway Research Board (HRB) classification of soils is based on

both particle size composition and plasticity characteristics

none of these

particle size composition

plasticity characteristics

27. The most suitable method for drainage of fine grained cohesive soils is

vacuum method

deep well system

electro-osmosis method

well point system

28. Toughness index is defined as the ratio of

consistency index to liquidity index

plasticity index to flow index

plasticity index to consistency index

liquidity index to flow index

29. Coarse grained soils are best compacted by a

drum roller

sheep's foot roller

rubber tyred roller

vibratory roller

30. Phreatic line in an earthen dam is

parabolic

elliptical

straight line

circular

Page 4 of 4

31. If the voids of a soil mass are full of air only, the soil is termed as

dehydrated soil

dry soil

partially saturated soil

air entrained soil

32. Which of the following methods is best suited for determination of permeability of coarse-grained soils?

d) none of these

c) both of (a) and (b)

b) falling head method

a) constant head method

33. Total number of stress components at a point within a soil mass loaded at its boundary is

9

6

16

3

34. Which one of the following clays behaves like a dense sand?

over-consolidated clay with a high over-consolidation ratio

over-consolidated clay with a low over-consolidation ratio

normally consolidated clay

under-consolidated clay

35. Uniformity coefficient of a soil is

always equal to 1

always less than 1

equal to or greater than 1

equal to or less than 1

36. Time factor for a clay layer is

directly proportional to permeability of soil

independent of thickness of clay layer

inversely proportional to drainage path

a dimensional parameter

37. Relative density of a compacted dense sand is approximately equal to

0.4

0.95

1.20

0.6

38. The ratio of volume of voids to the total volume of soil mass is called

voids ratio

porosity

percentage air voids

air content

39. If the plasticity index of a soil mass is zero, the soil is

clayey silt

silt

sand

clay

40. The water content of soil, which represents the boundary between plastic state and liquid state is known as

plasticity index

plastic limit

liquid limit

shrinkage limit

Geotechnical Engineering MCQs Set-2

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