Q. In a settlement analysis, which parameter is crucial for determining the time rate of consolidation?
A.
Coefficient of permeability
B.
Soil density
C.
Void ratio
D.
Shear strength
Solution
The coefficient of permeability is crucial for determining the time rate of consolidation, as it affects how quickly pore water can escape from the soil.
Q. What is the effect of preloading on settlement in soft soils?
A.
Increases immediate settlement
B.
Reduces long-term settlement
C.
Has no effect
D.
Increases shear strength
Solution
Preloading reduces long-term settlement in soft soils by accelerating consolidation and allowing excess pore water pressure to dissipate before construction.
Q. What is the primary cause of settlement in saturated clay soils?
A.
Consolidation due to applied loads
B.
Soil erosion
C.
Soil compaction
D.
Frost heave
Solution
Settlement in saturated clay soils primarily occurs due to consolidation, which is the process of volume reduction in soil due to the expulsion of water from the pores under applied loads.
Correct Answer:
A
— Consolidation due to applied loads
Q. What is the primary role of a geotechnical engineer in settlement analysis?
A.
Designing structural elements
B.
Conducting soil tests and analyses
C.
Managing construction schedules
D.
Estimating project costs
Solution
The primary role of a geotechnical engineer in settlement analysis is to conduct soil tests and analyses to assess soil behavior and predict settlement.
Correct Answer:
B
— Conducting soil tests and analyses
Q. What is the typical method used to predict settlement in granular soils?
A.
Terzaghi's one-dimensional consolidation theory
B.
Boussinesq's equation
C.
Mohr-Coulomb failure criterion
D.
Atterberg limits
Solution
Boussinesq's equation is typically used to predict settlement in granular soils, as it provides a method to calculate vertical stress distribution and resulting settlement.