soil mechanics and foundation engineering MCQs – Page 2

Practise focused soil mechanics and foundation engineering questions with marked answers for exam preparation and subject revision.

soil mechanics and foundation engineering Mcqs
21. Coefficient of permeability of soil______________?
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A. increases with the increase in temperature

B. does not depend upon temperature

C. increases with the decrease in temperature

D. none of the above

22. Coefficient of earth pressure at rest is__________________?
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A. less than active earth pressure but greater than passive earth pressure

B. greater than active earth pressure but less than passive earth pressure

C. greater than both the active earth pressure and passive earth pressure

D. less than both the active and passive earth pressures

23. Which of the following types of soil is transported by gravitational forces ?
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A. drift

B. dune sand

C. talus

D. loess

24. If the permeability of a soil is 0.8 mm/sec, the type of soil is_______________?
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A. silt

B. clay

C. sand

D. gravel

25. Which of the following soils has more plasticity index ?
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A. clay

B. gravel

C. sand

D. silt

26. Sand particles are made of________________?
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A. illite

B. rock minerals

C. kaolinite

D. montmorillonite

27. If the sand in-situ is in its densest state, then the relative density of sand is_____________?
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A. 1

B. greater than 1

C. zero

D. between 0 and 1

28. Effective stress on soil_____________?
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A. increases voids ratio and decreases permeability

B. increases both voids ratio and permeability

C. decreases both voids ratio and permeability

D. decreases voids ratio and increases permeability

29. Physical properties of a permeant which influence permeability are________________?
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A. viscosity only

B. unit weight only

C. both viscosity and unit weight

D. none of the above

30. The rise of water table below the foundation influences the bearing capacity of soil mainly by reducing_______________?
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A. cohesion and effective angle of shearing resistance

B. cohesion and effective unit weight of soil

C. effective angle of shearing resistance

D. effective unit weight of soil and effective angle of shearing resistance

31. According to Atterberg, the soil is said to be of medium plasticity if the plasticity index PI is____________?
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A. 0 < PI < 7

B. 17<PI27

C. 7
32. When the degree of saturation is zero, the soil mass under consideration represents______________?
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A. two phase system with soil and air

B. three phase system

C. one phase system

D. two phase system with soil and water

33. Sensitivity of a soil can be defined as___________________?
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A. none of the above

B. percentage of volume change of soil under saturated condition

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

D. ratio of volume of voids to volume of solids

34. Coarse grained soils are best compacted by a_______________?
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A. sheeps foot roller

B. vibratory roller

C. rubber tyred roller

D. drum roller

35. The major principal stress in an element of cohesionless soil within the backfill of a retaining wall is________________?
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A. vertical if the soil is in an active state of plastic equilibrium

B. vertical if the soil is in a passive state of plastic equilibrium

C. inclined at 45 to the vertical plane

D. none of the above

36. The average coefficient of permeability of natural deposits________________?
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A. parallel to stratification is always greater than that perpendicular to stratification

B. parallel to stratification is always less than that perpendicular to stratification

C. is always same in both directions

D. parallel to stratification may or may not be greater than that perpendicular to stratification

37. The coefficient of active earth pressure for a loose sand having an angle of internal friction of 30 is___________________?
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A. 1

B. 1/3

C. 3

D. 2-Jan

38. Which one of the following clays behaves like a dense sand ?
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A. under-consolidated clay

B. normally consolidated clay

C. over-consolidated ciay with a high over-consolidation ratio

D. over-consolidated clay with a low over-consolidation ratio

39. A retaining wall 6m high supports a backfill with a surcharge angle of 10. The back of the wall is inclined to the vertical at a positive batter angle of 5. If the angle of wall friction is 7, then the resultant active earth pressure will act at a distance of 2 m above the base and inclined to the horizontal at an angle of_________________?
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A. 7

B. 12

C. 10

D. 17

40. When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as_____________?
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A. zero

B. non-plastic (NP)

C. negative

D. 1