71. Which type of rock exhibits ductile behavior under stress? A. Granite B. Basalt C. Shale D. Marble E. 3 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Shale can show ductile behavior under prolonged loading due to its fine-grained, layered structure.Other rocks are more brittle.
72. The key factor for frost action in soil is: A. Organic matter B. Capillary rise C. Plasticity index D. Grain angularity E. 2 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Capillary rise allows water to reach freezing zones in soil.This causes expansion and potential damage from frost action.
73. The compressibility of soil is assessed using which test? A. Compaction test B. Triaxial test C. Consolidation test D. Shear box test E. 3 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Consolidation test measures how soil compresses over time under load.It helps predict settlement in foundations.
74. Which rock has the highest porosity? A. Shale B. Sandstone C. Granite D. Basalt E. 2 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Sandstone typically has higher porosity due to its granular texture.This allows it to store and transmit fluids effectively.
75. The unconfined compressive strength (UCS) test is not suitable for: A. Dry sand B. Clay C. Silty clay D. Saturated clay E. 1 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Dry sand lacks cohesion and cannot stand unsupported.UCS is only valid for cohesive soils.
76. Specific gravity of soil solids is used in calculating: A. Plasticity B. Dry density C. Shear strength D. Void ratio E. 2 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Specific gravity helps determine dry density by relating mass of solids to volume.It is essential in compaction and classification.
77. Which of the following is a cohesionless soil? A. Clay B. Silt C. Gravel D. Peat E. 3 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Gravel lacks cohesive properties and depends on particle interlock and friction for strength.It is classified as cohesionless.
78. Soil structure refers to the: A. Arrangement of particles B. Size of grains C. Type of minerals D. Soil color E. 1 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: Soil structure is the physical arrangement of soil particles and their aggregates.It influences permeability, strength, and compaction.
79. Rock mass rating (RMR) system is used for: A. Measuring soil compaction B. Classifying slope angle C. Estimating rock quality D. Determining porosity E. 3 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: RMR is a rock classification system that evaluates strength, discontinuities, and groundwater conditions.It's widely used in tunnel and slope design.
80. Perched water table is found: A. Above the main water table B. Below the aquifer C. Within a confined aquifer D. In fractured bedrock E. 1 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option Solution: A perched water table forms above an impermeable layer.It is a localized zone of satura
