Question $2[3$x$6=18$ Marks$]$

$2\mathrm{.}1.$ What is involved in geotechnical drilling, and how does it contribute to site

investigations and data collection?

$2\mathrm{.}2.$ How do shear strength and stiffness relate to soil behaviour, and how are these

properties determined through laboratory testing?

$2\mathrm{.}3.$ Can you explain the soil classification system $($USCS$),$ and how is it utilized in

geotechnical engineering assessments?

$2\mathrm{.}4.$ What are the distinguishing characteristics of collapsible soils and heaving

soils, and how do they impact construction projects?