NB ASBOG Assorted PG material

NB ASBOG Assorted PG material If more than 50% of soil is retained on the No. 200 sieve (0.003 inch), the soil is classified as: - ANS- Coarse grained What sieve number is the boundary for coarse and fine grained soils? - ANS-No. 200 (0.003 inch) If more than 50% of soil is retained on the No 4 sieve, it is classified as a: - ANS-Gravel Material retained on this sieve number represents the smallest particle size visible to the unaided eye: - ANS-No. 200 (0.003 inch) sieve The larger the "us standard sieve" number, the _____ the particle size. - ANS-Smaller. For example, gravel is retained on the no. 4 sieve, medium sand is retained on the no. 40 sieve, and find grained sand is retained on the no. 200 sieve. A soil is considered poorly graded if it contains ____ or fewer sieve sizes. - ANS-3 For a gravel or sand to be assigned a W or P, there must be what percentage or lower of fines? - ANS- <5% fines A well-graded soil has a Uniformity coefficient of greater than ___ for gravel and ___ for sand - ANS- 4, 6 If there are between 5% and 12% fines in a gravelly or sandy soil, what would the classification look like? - ANS-It would be a dual classification, showing the first group symbol plus a second that indicates "with clay" or "with silt" Eg: GW-GM- well graded gravel with silt...