Correct Answer - Option 4 : GW
Concept-
According to IS Classification system, the soils can be classified into 18 groups.
Soil classification using group symbols is as follows:
|
Group Symbol
|
Classification
|
|
Coarse soils
|
|
GW
|
Well-graded GRAVEL
|
|
GP
|
Poorly-graded GRAVEL
|
|
GM
|
Silty GRAVEL
|
|
GC
|
Clayey GRAVEL
|
| |
|
SW
|
Well-graded SAND
|
|
SP
|
Poorly-graded SAND
|
|
SM
|
Silty SAND
|
|
SC
|
Clayey SAND
|
|
|
|
Fine soils
|
|
ML
|
SILT of low plasticity
|
|
MI
|
SILT of intermediate plasticity
|
|
MH
|
SILT of high plasticity
|
|
|
|
CL
|
CLAY of low plasticity
|
|
CI
|
CLAY of intermediate plasticity
|
|
CH
|
CLAY of high plasticity
|
|
|
|
OL
|
Organic soil of low plasticity
|
|
OI
|
Organic soil of intermediate plasticity
|
|
OH
|
Organic soil of high plasticity
|
|
|
|
Pt
|
Peat
|
