81. What is the main use of a piezometer in geotechnical investigation?
82. Which factor is most critical in selecting a boring method?
83. What is the main limitation of the auger boring method?
84. What is the purpose of performing a plate load test?
85. Which sampling technique preserves the in-situ condition of soft clay best?
86. What information does the RQD value provide?
87. What is an exploratory trench used for?
88. When is dynamic cone penetration test preferred?
89. Which geophysical method uses sound waves to map subsurface layers?
90. What is the main disadvantage of geophysical surveys in dense urban areas?
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