What does the CBR test measure?
A Soil permeability
B Soil strength for roads
C Soil’s moisture content
D Soil’s shrinkage
What is the role of geotextiles in soil stabilization?
A Prevent erosion
B Increase moisture
C Decrease compaction
D Decrease plasticity
What causes soil liquefaction?
A High shear strength
B High compaction
C Low permeability
D Excessive moisture and shaking
What does the stress-strain behavior of soil describe?
A Soil’s response to moisture
B Soil’s ability to resist shear
C Soil’s deformation under load
D Soil’s permeability
What is capillary action in soils?
A Water rises through small pores
B Water flows through large pores
C Soil shrinks when dry
D Soil absorbs water quickly
What happens to swelling soils when wet?
A They shrink
B They expand
C They become more compact
D They lose strength
Which soil property is most affected by erosion?
A Soil permeability
B Soil density
C Soil fertility
D Soil plasticity
What is the effect of unsaturated soil conditions on soil strength?
A Increases permeability
B Reduces strength
C No effect
D Increases strength
What is the purpose of soil improvement techniques?
A Improve soil’s load-bearing capacity
B Increase soil permeability
C Decrease soil shrinkage
D Increase plasticity
What type of soil is most prone to erosion?
A Sandy soil
B Silt
C Clay
D Gravel
What does soil-structure interaction analyze?
A Effect of structure on soil properties
B Soil’s water retention properties
C Interaction between soil and structure under load
D Soil’s shrinkage behavior
What is the purpose of laboratory testing in soil mechanics?
A To determine soil properties
B To analyze soil structure
C To measure permeability
D To control soil erosion
What does the Proctor test measure in soil?
A Shear strength
B Plasticity
C Soil erosion
D Optimum moisture content for compaction
What is the primary concern with clay minerals in soils?
A High plasticity
B Low permeability
C High compaction
D High erosion potential
What is the effect of liquefaction on structures?
A Strengthens foundations
B Increases shear strength
C Causes structural failure
D Decreases soil permeability