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Civil Engineering PE

Category - Subsurface

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While conducting a subsurface exploration program, which of the following characteristics of coarse-grained soils is not determined?

Presence of organic materials
In-situ density
Stiffness
Gradation

Explanation

Answer: C - While conducting a subsurface exploration program, stiffness of coarse-grained soils is not determined. Stiffness is determined for each stratum of fine-grained soils, in addition other following characteristics such as:

• Natural moisture contents
• Atterberg limits
• Presence of organic material
• Swelling
• Unconfined compressive strength
• Shear strength
• Compressibility

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