- 1. Soil mechanics is a branch of civil engineering that deals with the properties and behavior of soil under various conditions. It involves the study of soil formation, classification, and composition, as well as the analysis of how soils interact with structures and foundations. By understanding the mechanical and hydraulic properties of soil, engineers can design and construct safe and stable foundations for buildings, roads, dams, and other infrastructure projects. Soil mechanics also plays a crucial role in geotechnical engineering, helping to assess and mitigate risks such as soil erosion, landslides, and foundation settlement.
What is the purpose of a soil compaction test?
A) To evaluate the soil pH level.
B) To determine the optimal moisture content and maximum dry density of soil.
C) To measure the electrical conductivity of soil.
D) To study the color variations of soil.
- 2. Which type of soil has the smallest particle size?
A) Clay
B) Sand
C) Gravel
D) Silt
- 3. What does the term 'Atterberg limits' refer to in soil mechanics?
A) The color limits of soil.
B) The temperature limits at which soil expands.
C) The pH limits of soil.
D) The moisture content limits at which soil transitions between different states.
- 4. What factors affect the shear strength of soil?
A) Particle shape, particle size, and moisture content.
B) Soil color and density.
C) Soil acidity and temperature.
D) Soil compaction and organic content.
- 5. What test method is used to determine the liquid limit of soil?
A) Casagrande method
B) Compaction test
C) pH test
D) Permeability test
- 6. What is the definition of the term 'void ratio' in soil mechanics?
A) The ratio of volume of void space to the volume of solids in a soil mass.
B) The ratio of sand particles to clay particles in soil.
C) The ratio of moisture content to dry density in soil.
D) The ratio of organic matter to inorganic matter in soil.
- 7. Which test is used to determine the water content at which soil transitions from a plastic to liquid state?
A) Plastic limit test
B) Compaction test
C) Liquid limit test
D) Permeability test
- 8. What is the term used to describe the ability of soil to withstand deformation without failure?
A) Plasticity
B) Shear strength
C) Elasticity
D) Permeability
- 9. Which test is used to determine the relationship between water content and dry density of soil?
A) Triaxial compression test
B) Proctor compaction test
C) Liquid limit test
D) Plastic limit test
- 10. In which soil state does the soil contain both water and air, but voids are not filled entirely?
A) Unsaturated
B) Fully saturated
C) Capillary saturated
D) Partially saturated
- 11. Which soil classification system is widely used in geotechnical engineering?
A) Unified Soil Classification System (USCS)
B) WRB soil classification
C) FAO soil classification
D) AASHTO soil classification
- 12. What is the term for the ability of a soil to transmit water?
A) Plasticity
B) Consolidation
C) Shear strength
D) Permeability
- 13. What is the term for the pressure that water exerts on the soil particles?
A) Atmospheric pressure
B) Hydrostatic pressure
C) Pore water pressure
D) Overburden pressure
- 14. What is the term for the process of removing air voids from soil by applying pressure?
A) Compaction
B) Consolidation
C) Filtration
D) Liquefaction
- 15. Which theory relates the soil shear strength to the effective normal stress and the soil's cohesion and friction angle?
A) Terzaghi theory
B) Casagrande theory
C) Atterberg theory
D) Mohr-Coulomb theory
- 16. Which soil property greatly influences its compressibility?
A) Soil color
B) Moisture content
C) Void ratio
D) Particle shape
- 17. Which soil type has a grain size between sand and clay?
A) Peat
B) Loam
C) Silt
D) Gravel
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