$(2)$ Mechanical analysis on four different samples designated as A$,$ B$,$ C and D were carried out in

a soil laboratory. The results of tests are given below. Hydrometer analysis was carried out on

sample D$.$ The soil is non$-$plastic. Sample D: liquid limit $=42,$ plastic limit $=24,$ plasticity index

$=18.$ Classify the soils per the Unified Soil Classification System. $(20$ Marks$)2)$ Mechanical analysis on four different samples designated as A$,$ B$,$ C and D were carried out in$$a soil laboratory. The results of tests are given below. Hydrometer analysis was carried out on sample D$.$ The soil is non$-$plastic. Sample D: liquid limit $=42,$ plastic limit $=24,$ plasticity index $=18.$ Classify the soils per the Unified Soil Classification System. $(20$ Marks$)$

ASTM Sieve

Designation Percentage finer than

A B C D

$63\mathrm{.}0$ mm $10093$

$20\mathrm{.}0$ mm $6476$

$6\mathrm{.}3$mm $3910065$

$2\mathrm{.}0$ mm $249859$

$600129054$

$2125947100$

$63123495$

$202369$

$6746$

$2431$