41. The engineering significance of a rock's porosity lies in its:
42. What type of excavation support is commonly used in weak rock during tunneling?
43. Which test determines rock durability under wetting and drying cycles?
44. A foundation must not be placed above which geological feature?
45. What is the main purpose of a geological map in site selection?
46. Which geological process can cause settlement of buildings over time?
47. A rock with high unconfined compressive strength is preferred for:
48. Which rock type is most problematic for tunneling due to swelling behavior?
49. What is the main engineering concern with clayey soils in construction?
50. The Dip of a bedding plane affects:
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