41. A higher dry density in a soil sample indicates: A. Lower compaction B. Greater void ratio C. Better strength D. More water content E. 3 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Dry density reflects the mass of solids per volume of soil.Higher values imply denser packing, usually resulting in improved strength and stability.
42. Which test is used to find the permeability of coarse-grained soils? A. Falling head test B. Constant head test C. Direct shear test D. Tri-axial test E. 2 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: The constant head test is suitable for coarse-grained soils like sands and gravels because water flows freely through them.
43. Soil consistency is primarily determined by: A. Soil texture B. Soil type C. Water content D. Organic matter E. 3 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Consistency describes how soil resists deformation and is highly dependent on moisture content.
44. What is the major difference between compaction and consolidation? A. Compaction is a slow process B. Consolidation removes air C. Compaction uses mechanical energy D. Consolidation is mechanical E. 3 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Compaction is immediate and involves mechanical reduction of air voids.Consolidation is time-dependent and involves expulsion of water from voids.
45. In soil classification, what does the symbol "CL" represent? A. Clean sand B. Low plasticity clay C. Lean clay D. Silt E. 2 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: According to the Unified Soil Classification System (USCS), CL = Low plasticity clay.It has moderate strength and plasticity.
46. The effective stress in soil is defined as: A. Total stress minus pore pressure B. Total stress plus pore pressure C. Pore pressure only D. Total stress only E. 1 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Effective stress = Total stress ? Pore water pressure.It determines the strength and deformation behavior of soil.
47. A rock with high tensile strength can resist: A. Shearing B. Tension C. Compression D. Erosion E. 2 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Tensile strength refers to the ability of a material to resist breaking under pulling forces.Rocks typically have low tensile strength.
48. The swelling pressure in expansive clays is caused by: A. Organic content B. Capillary action C. Absorption of water D. Thermal expansion E. 3 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Expansive clays absorb water and swell, generating pressure.This affects foundations and pavements.
49. Loose, granular soils are compacted using: A. Static rollers B. Water jets C. Vibratory rollers D. Hydraulic rams E. 3 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Vibratory rollers are ideal for densifying granular soils by shaking particles into a denser configuration.
50. The angle of internal friction in sandy soils typically: A. Is very low B. Depends on plasticity C. Ranges from 30-45 degrees D. Remains constant regardless of compaction E. 3 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Angle of internal friction is a key shear strength parameter.Sandy soils typically show angles between 30-45�, increasing with compaction.
