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22-Agric-A2 Soil Physics and Mechanics: December 2015

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Short Answers — Effective Stress, USCS Classification, Dewatering Investigation, and Erosion Estimation
  2. Question 2 Unconfined Aquifer on a Circular Island — Water-Table Sketches, Well Drawdown, and the Effect of Infiltration
  3. Question 3 Weight-Volume Relationships from a Pushed Copper-Pipe Field Sample
  4. Question 4 Pore, Total and Effective Stress in a Layered Profile Before and After Rapid Dewatering
  5. Question 5 Horton Infiltration — Fitting the Decay Constant and Total 4-Hour Infiltration
  6. Question 6 Compaction — Proctor Density, Borrow-Pit Volume, and the Moisture–Density Curve Family
  7. Question 7 Apparent vs. Effective Shear-Strength Parameters from Two Consolidated-Undrained Triaxial Tests

Start with Question 1 →

Paper format. 04-Agric-A2 Soil Physics & Mechanics, National Exams December 2015 — a three-hour open-book examination; any non-communicating calculator is permitted. The cover page states that five (5) questions constitute a complete exam paper and that only the first five as they appear in the answer book are marked, that each question is of equal value, and that some questions require a written answer whose clarity and organization matter for marks. All seven printed questions are worked here, because the set is a study resource rather than a timed attempt; on exam day a candidate submits only the first five, in order.

Reference texts. B.M. Das, Principles of Geotechnical Engineering, 9th ed. (weight-volume relationships, permeability, seepage, effective stress, compaction, shear strength); R.F. Craig, Craig's Soil Mechanics, 9th ed. (effective stress, seepage and flow nets, shear strength); G.O. Schwab et al., Soil and Water Conservation Engineering, 5th ed. (infiltration, erosion estimation, drainage).