Unified soil classification (including identification and description)

Question 1

Well graded gravels, gravel sand mixtures, little or no fines

Answer 1

GW

Question 2

Poorly graded gravels, gravel sand mixtures, little or no fines

Answer 2

GP

Question 2

Silty gravels, poorly graded gravel-sand-silt mixtures

Answer 2

GM

Question 3

Clayey gravels, poorly graded gravel-sand-clay mixtures

Answer 3

GC

Question 4

Well graded sands, gravelly sands, little or no fines

Answer 4

SW

Question 5

Poorly graded sands, gravelly sands, little or no fines

Answer 5

SP

Question 6

Silty sands, poorly graded sand-silt mixtures

Answer 6

SM

Question 7

Clayey sands, poorly graded sand-clay mixtures

Answer 7

SC

Question 8

Inorganic silts and very fine sands, rock flour, silty or clayey fine sands with slight plasticity

Answer 8

ML

Question 9

Inorganic clays of low to medium plasticity, gravelly clays, sandy clays, silty clays, lean clay

Answer 9

CL,CI

Question 9

Organic silts and organic silt clays of low plasticity

Answer 9

OL

Question 9

inorganic silts, micaceous or dictomaceousfine sandy or silty soils, elastic silts

Answer 9

MH

Question 10

Inorganic clays of high plasticity, fat clays

Answer 10

CH

Question 11

Organic clays of medium to high plasticity

Answer 11

OH

Question 12

Peat and other highly organic soils

Answer 12

Pt