Geotechnical Engineering MCQs Set-2

Page 1 of 4

1. Coefficient of permeability of soil

increases with the increase in temperature

increases with the decrease in temperature

does not depend upon temperature

none of these

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

greater than specific gravity of soil

less than specific gravity of soil

independent of specific gravity of soil

equal to specific gravity of soil

3. 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

4. Residual soils are formed by

water

none of these

glaciers

wind

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

none of these

kaolinite

montmorillonite

illite

6. Cohesive soils are

good for backfill because of low lateral pressure

poor for backfill because of large lateral pressure

good for backfill because of high shear strength

none of these

7. Toughness index is defined as the ratio of

plasticity index to consistency index

consistency index to liquidity index

plasticity index to flow index

liquidity index to flow index

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

gravel

sand

clay

silt

9. Inorganic soils with low compressibility are represented by

SL

ML

MH

CH

10. Phreatic line in an earthen dam is

circular

elliptical

straight line

parabolic

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

loess

talus

dune sand

drift

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

voids ratio

percentage air voids

porosity

air content

13. The shear strength of a soil

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

decreases with increase in normal stress

decreases with decrease in normal stress

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

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

d) none of these

b) falling head method

a) constant head method

c) both of (a) and (b)

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

1.20

0.6

0.95

0.4

16. 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 square of drainage path and inversely proportional to time

directly proportional to time and inversely proportional to drainage path

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

vertical and rough

plane and rough

plane and smooth

vertical and smooth

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

both particle size composition and plasticity characteristics

particle size composition

none of these

plasticity characteristics

19. 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

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

clayey silt

sand

clay

silt

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21. Rate of consolidation

increases with increase in temperature

is unaffected by permeability of soil

is independent of temperature

increases with decrease in temperature

22. Time factor for a clay layer is

independent of thickness of clay layer

inversely proportional to drainage path

directly proportional to permeability of soil

a dimensional parameter

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

over-consolidated clay with a low over-consolidation ratio

normally consolidated clay

under-consolidated clay

over-consolidated clay with a high over-consolidation ratio

24. Coarse grained soils are best compacted by a

sheep's foot roller

vibratory roller

drum roller

rubber tyred roller

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

effective stress only

total stress only

none of these

both effective stress and total stress

26. At liquid limit, all soils possess

different shear strengths of large magnitude

same shear strength of small magnitude

different shear strengths of small magnitude

same shear strength of large magnitude

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

1

non-plastic (NP)

negative

zero

28. Uniformity coefficient of a soil is

equal to or less than 1

always equal to 1

always less than 1

equal to or greater than 1

29. The effect of cohesion on a soil is to

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

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

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

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

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

6

3

9

16

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

greater than 0.2 mm

all of these

less than 0.0002 mm

between 0.2 mm and 0.0002 mm

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

effective size

coefficient of curvature

none of these

uniformity coefficient

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

liquid state

semi-solid state

plastic state

solid state

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

plastic limit

plasticity index

liquid limit

shrinkage limit

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

electro-osmosis method

well point system

vacuum method

deep well system

36. A fully saturated soil is said to be

three phase system

two phase system with soil and air

two phase system with soil and water

one phase system

37. Unconfined compressive strength test is

consolidated undrained test

undrained test

drained test

consolidated drained test

38. Coefficient of consolidation of a soil is affected by

none of these

both compressibility and permeability

compressibility

permeability

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

partially saturated soil

dehydrated soil

air entrained soil

dry soil

40. Sand particles are made of

rock minerals

illite

kaolinite

montmorillonite

Geotechnical Engineering MCQs Set-2

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