SSC JE Exam - grain size distribution index properties atterberg limits soil classification permeability consolidation settlement Question Bank with Options

1. The term 'liquidity index' relates the natural moisture content to the:

A) Plastic limit and shrinkage limit

B) Liquid limit and plastic limit

C) Shrinkage limit and liquid limit

D) Plastic limit and cohesion

2. Secondary consolidation is primarily due to:

A) Elastic readjustment of soil skeleton

B) Viscous forces and physicochemical effects

C) Expulsion of pore water under primary pressure

D) Changes in temperature

3. The coefficient of permeability 'k' has units of:

A) Length/Time (e.g., m/s)

B) Area/Time (e.g., m²/s)

C) Force/Area (e.g., N/m²)

D) Dimensionless

4. Which soil classification system is widely used in highway construction?

A) USCS

B) AASHTO

C) IS Classification

D) FAO Classification

5. The plastic limit (PL) is the moisture content at which the soil changes from:

A) A liquid state to a plastic state

B) A plastic state to a semi-solid state

C) A semi-solid state to a solid state

D) A granular state to a cohesive state

6. The void ratio of a soil decreases as it undergoes:

A) Swelling

B) Consolidation

C) Drying

D) Saturation

7. Which of the following is NOT a typical method for determining the shear strength of a soil?

A) Direct Shear Test

B) Triaxial Compression Test

C) Unconfined Compression Test

D) Sieve Analysis

8. A saturated soil sample has a degree of saturation of:

A) 0%

B) 50%

C) 100%

D) Variable

9. The term 'degree of saturation' refers to the ratio of:

A) Volume of air to volume of voids

B) Volume of water to volume of voids

C) Volume of water to volume of solids

D) Volume of solids to total volume

10. Which parameter is crucial for determining the bearing capacity of a foundation in soil?

A) Permeability

B) Consolidation settlement

C) Shear strength

D) Grain size distribution

11. The shear strength of a soil is its resistance to:

A) Compression

B) Tension

C) Shearing stresses

D) Bending

12. A soil sample has a Uniformity Coefficient (Cu) of 1.5. This indicates:

A) A wide range of particle sizes (well-graded)

B) A narrow range of particle sizes (poorly graded)

C) A high percentage of silt

D) A high liquid limit

13. Which of the following is a measure of the degree of uniformity of particle sizes in a soil sample?

A) Plasticity Index

B) Uniformity Coefficient (Cu)

C) Specific Gravity

D) Liquid Limit

14. The effective size (D10) is used in the calculation of:

A) Plasticity Index

B) Coefficient of Permeability using empirical formulas (e.g., Hazen's)

C) Liquid Limit

D) Degree of Saturation

15. A soil with a void ratio of 1.5 has:

A) More solids than voids

B) More voids than solids

C) Equal volumes of solids and voids

D) No water content

16. The void ratio of a soil is defined as the ratio of:

A) Volume of solids to volume of voids

B) Volume of voids to volume of solids

C) Volume of water to volume of solids

D) Volume of solids to total volume

17. Which index property is used to classify soils as either expansive or non-expansive?

A) Plasticity Index (PI)

B) Liquid Limit (LL)

C) Shrinkage Limit (SL)

D) Void Ratio (e)

18. In the context of soil classification, 'GW' in the USCS system denotes:

A) Gravel with well-graded characteristics

B) Clay with low plasticity

C) Silt with high compressibility

D) Organic soil with poor drainage

19. The standard laboratory test for determining the permeability of cohesive soils is often:

A) Constant head permeameter test

B) Falling head permeameter test

C) Triaxial compression test

D) Oedometer test

20. Which of the following soil types generally has the highest permeability?

A) Clay

B) Silt

C) Sand

D) Peat

21. The critical hydraulic gradient is the gradient at which:

A) Water flows fastest through the soil

B) Soil particles begin to move due to the upward flow of water (boiling)

C) Consolidation settlement is completed

D) The soil becomes fully saturated

22. A soil sample has a Liquid Limit of 60% and a Plastic Limit of 30%. Its Liquidity Index (LI) is 0.5. What is its current moisture content?

A) 30%

B) 45%

C) 60%

D) 75%

23. Which of the following is a common method for determining the liquid limit of a soil?

A) Direct shear test

B) Cone penetrometer test

C) Casagrande apparatus method

D) Standard compaction test

24. The time factor (Tv) in consolidation theory is a dimensionless parameter that relates:

A) The applied load to the final settlement

B) The elapsed time to the rate of consolidation and the thickness of the consolidating layer

C) The permeability to the void ratio

D) The coefficient of compressibility to the initial void ratio

25. A soil deposit is considered normally consolidated if:

A) It has never been subjected to stresses greater than its current overburden pressure

B) It has been subjected to stresses greater than its current overburden pressure in the past

C) Its void ratio is at its maximum possible value

D) Its permeability is very low

26. The compression index (Cc) is a parameter used in the calculation of consolidation settlement and is typically determined from:

A) A sieve analysis curve

B) A plot of void ratio versus the logarithm of effective stress

C) A plot of permeability versus moisture content

D) A triaxial shear test

27. Which type of settlement occurs immediately after the application of load and is due to the expulsion of air from the voids?

A) Primary consolidation settlement

B) Secondary consolidation settlement

C) Immediate settlement

D) Total settlement

28. The relationship between total stress, effective stress, and pore water pressure is given by:

A) Effective Stress = Total Stress + Pore Water Pressure

B) Total Stress = Effective Stress + Pore Water Pressure

C) Pore Water Pressure = Total Stress + Effective Stress

D) Effective Stress = Total Stress * Pore Water Pressure

29. What does the term 'effective stress' in soil mechanics represent?

A) The total stress acting on the soil

B) The stress carried by the pore water

C) The stress carried by the soil solids, which controls deformation and strength

D) The stress due to the weight of the soil particles only

30. Which Atterberg limit test involves using a Casagrande apparatus?

A) Plastic Limit test

B) Shrinkage Limit test

C) Liquid Limit test

D) Hydrometer test

31. The shear strength of a cohesive soil is significantly influenced by:

A) The grain size distribution

B) The angle of internal friction

C) The cohesion intercept

D) The permeability

32. The shear strength of a granular soil is primarily dependent on:

A) Its plastic limit

B) Its liquid limit

C) Its internal friction angle

D) Its moisture content

33. In the Unified Soil Classification System (USCS), 'Pt' denotes:

A) Peat and other highly organic soils

B) Poorly graded sands

C) Plastic silts

D) Potentially expansive clays

34. The final settlement of a soil layer under a given load is primarily influenced by:

A) The rate of drainage

B) The initial void ratio and the applied stress

C) The permeability of the overlying layer

D) The coefficient of consolidation

35. Which of the following is a direct measure of the compressibility of a clay soil under load?

A) Permeability

B) Void Ratio

C) Coefficient of Volume Compressibility (mv)

D) Specific Gravity

36. The coefficient of volume compressibility (mv) relates the change in volume to:

A) The change in moisture content

B) The change in applied stress

C) The change in void ratio

D) The change in shear strength

37. A soil sample has a liquid limit of 45% and a plastic limit of 25%. What is its Plasticity Index (PI)?

A) 20%

B) 30%

C) 70%

D) 1.8%

38. The liquid limit (LL) is defined as the moisture content at which the soil:

A) Starts to shrink

B) Becomes fully saturated

C) Changes from a plastic to a liquid state under a small shear force

D) Becomes hard and brittle

39. Which type of soil is most likely to exhibit significant secondary consolidation?

A) Clean sands

B) Gravels

C) Organic clays and peat

D) Silty sands

40. The coefficient of consolidation (Cv) is used to determine the rate of consolidation and depends on:

A) The void ratio and the applied pressure

B) The permeability and the coefficient of compressibility

C) The thickness of the consolidating layer and the drainage path

D) The specific gravity of soil solids and the water content

41. Darcy's Law is fundamental to the study of soil permeability and states that the discharge velocity is proportional to:

A) The square of the hydraulic gradient

B) The hydraulic conductivity and the hydraulic gradient

C) The inverse of the hydraulic gradient

D) The void ratio and the hydraulic gradient

42. Which of the following is a measure of the void ratio change during consolidation?

A) Coefficient of Permeability

B) Coefficient of Consolidation

C) Compression Index

D) Swelling Index

43. A soil with a high Plasticity Index (PI) generally indicates:

A) Low compressibility and low water content

B) High compressibility and a tendency to shrink and swell

C) Good drainage characteristics

D) Inorganic sand with good stability

44. The plasticity index (PI) of a soil is defined as the difference between:

A) Liquid Limit and Shrinkage Limit

B) Plastic Limit and Shrinkage Limit

C) Liquid Limit and Plastic Limit

D) Field Moisture Content and Liquid Limit

45. In a sieve analysis, the D10 value represents the:

A) Diameter at which 10% of the soil by weight is finer

B) Diameter at which 90% of the soil by weight is finer

C) Average diameter of the soil particles

D) Maximum particle size in the sample

46. Settlement in soils refers to:

A) The increase in soil volume due to moisture

B) The decrease in soil volume under load

C) The rate at which water flows through the soil

D) The ability of the soil to retain water

47. Consolidation is a process primarily associated with:

A) Sandy soils under rapid loading

B) Clayey soils under sustained loading

C) Organic soils with high void ratios

D) Gravelly soils with low permeability

48. Permeability of a soil is a measure of:

A) Its ability to resist shear stress

B) Its ability to transmit water

C) Its ability to swell when wet

D) Its ability to compact under load

49. Which soil classification system uses symbols like GW, SP, CL, and CH?

A) USCS (Unified Soil Classification System)

B) AASHTO (American Association of State Highway and Transportation Officials)

C) ISCS (Indian Standard Soil Classification)

D) USDA (United States Department of Agriculture) System

50. The Atterberg limits are a series of tests performed on fine-grained soils to determine their behavior at different moisture contents. Which of the following is NOT an Atterberg limit?

A) Liquid Limit

B) Plastic Limit

C) Shrinkage Limit

D) Friction Limit

grain size distribution index properties atterberg limits soil classification permeability consolidation settlement - Question Bank