Q. What does the term 'permeability' refer to in soil mechanics?
A.
The ability of soil to retain water
B.
The ability of soil to transmit water
C.
The density of soil particles
D.
The compressibility of soil
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Solution
Permeability refers to the ability of soil to transmit water, which is critical for understanding drainage and seepage in geotechnical engineering.
Correct Answer:
B
— The ability of soil to transmit water
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Q. What is the main purpose of a foundation in civil engineering?
A.
To provide aesthetic appeal
B.
To distribute loads to the soil
C.
To prevent soil erosion
D.
To enhance soil fertility
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Solution
The main purpose of a foundation is to distribute the loads from the structure to the underlying soil, ensuring stability and safety.
Correct Answer:
B
— To distribute loads to the soil
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Q. What is the primary factor affecting the consolidation of saturated clay soils?
A.
Soil texture
B.
Effective stress
C.
Soil color
D.
Organic content
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Solution
Effective stress is the primary factor affecting consolidation, as it governs the behavior of pore water pressure and soil skeleton.
Correct Answer:
B
— Effective stress
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Q. What is the primary purpose of soil classification?
A.
To determine soil color
B.
To predict soil behavior under load
C.
To measure soil moisture content
D.
To assess soil fertility
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Solution
Soil classification helps in predicting how soil will behave under various loading conditions, which is crucial for engineering applications.
Correct Answer:
B
— To predict soil behavior under load
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Q. What is the significance of the plasticity index in soil mechanics?
A.
It indicates soil density
B.
It measures the range of moisture content over which soil behaves plastically
C.
It determines soil color
D.
It assesses soil permeability
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Solution
The plasticity index measures the range of moisture content over which a soil behaves plastically, indicating its workability and suitability for construction.
Correct Answer:
B
— It measures the range of moisture content over which soil behaves plastically
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Q. What type of retaining wall is designed to resist lateral earth pressure?
A.
Gravity wall
B.
Cantilever wall
C.
Sheet pile wall
D.
All of the above
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Solution
All of the mentioned types of retaining walls are designed to resist lateral earth pressure, each with its own application and design considerations.
Correct Answer:
D
— All of the above
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Q. Which of the following is a method to determine the shear strength of soil?
A.
Standard Proctor test
B.
Triaxial compression test
C.
Sieve analysis
D.
Plasticity index test
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Solution
The triaxial compression test is a common method used to determine the shear strength of soil under controlled conditions.
Correct Answer:
B
— Triaxial compression test
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