What is the primary factor affecting soil permeability?
A Particle size
B Water content
C Soil color
D Soil depth
What does the term “consolidation” in soil mechanics refer to?
A Soil volume increase due to water
B Water retention in soil
C Increase in soil density
D Volume reduction due to load and expulsion of water
What is the main objective of the CBR test?
A Measure shear strength
B Evaluate soil’s resistance to penetration for roads
C Determine soil compaction
D Measure permeability
What is a common characteristic of clay minerals?
A High permeability
B Large particle size
C High plasticity and moisture retention
D Low shrinkage
What is the purpose of the Proctor test?
A Determine optimal moisture for compaction
B Measure shear strength
C Evaluate consolidation rate
D Measure soil temperature
What does soil-structure interaction study?
A Soil’s ability to retain moisture
B Effects of structures on soil behavior
C Soil’s permeability
D Soil erosion
What is the main purpose of soil stabilization?
A Reduce water retention
B Increase soil volume
C Decrease permeability
D Improve soil strength and durability
What is the role of geotextiles in construction?
A Improve soil fertility
B Increase soil permeability
C Reinforce soil and prevent erosion
D Reduce soil strength
What is the most common consequence of swelling soils?
A Cracking of foundations
B Increased permeability
C Reduced shear strength
D Decreased moisture retention
What does effective stress influence in soils?
A Permeability
B Strength and stability
C Soil moisture content
D Plasticity
What is the main feature of unsaturated soil mechanics?
A Soil behavior under high moisture content
B Soil compaction
C Soil behavior when moisture is below saturation
D Soil permeability
What causes soil erosion?
A High compaction
B Soil freezing
C High plasticity
D Water and wind movement
What is the primary function of the triaxial test in soil mechanics?
A Measure soil permeability
B Measure soil’s shear strength
C Evaluate consolidation rate
D Determine soil’s moisture content
What does capillary action affect in soils?
A Soil’s shrinkage
B Soil strength
C Water movement through soil
D Soil density
What type of soil typically experiences the highest capillary rise?
A Clay
B Gravel
C Sand
D Silt