The falling-head permeability test is most appropriate for determining the permeability of:
Correct answer: A. Fine-grained soil
- A. Fine-grained soil
- B. Coarse sand
- C. Clean gravel
- D. Open rock joints
Explanation
Fine-grained soils transmit water slowly, so the change in water level in a standpipe can be measured over time. Constant-head testing is more suitable for relatively permeable soils such as sands and gravels.
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About Soil Mechanics and Foundations
Soil mechanics examines index properties, phase relationships, classification, permeability, seepage, compaction, consolidation, shear strength and earth pressure. Foundations apply these principles to bearing capacity, settlement and shallow or deep foundation selection, with clear distinction between compaction, which expels air, and consolidation, which expels water over time.
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