Question

Questions 1 through 6 are based on a soil with the following properties:

     Liquid Limit = 30.0%

     Plastic Limit = 12.0%

     Sieve Analysis:

Sieve Size	% Passing
3/8”	100%
No. 4	75.2%
No. 10	60.0%
No. 40	40.1%
No. 200	16.0%

1.           The fine-grained portion of the soil is:

              a. 16.0%               b. 40.1%              c. 84.0%               d. 59.9%

2.           % retained on No. 4 sieve is:

              a. 75.2%               b. 60.0%              c. 40.1%               d. 24.8%

3.           The Coarse Fraction of the soil is:

              a. 75.2%               b. 84.0%              c. 15.2%               d. 39.7%

4.           % of coarse fraction that retained on No. 4 sieve is:

              a. 23.5%               b. 27.7%              c. 15.2%               d. 29.5%

5.           The Plasticity Index (PI) of the soil is:

              a. 42%                  b. 18%                 c. 12%                  d. 30%

6.           With Unified method, the soil is classified as:

              a. SC                    b. SM                   c. GC                    d. GM

7.           A soil is composed of 20% Sand, 35% Silt, and 45% Clay. Using USDA method, the soil is classified as:

              a. sandy loam.                    b. silt.                   c. clay

8.           Use the AASHTO method to classify the following soil

Soil Properties

LL = 48 and PI = 30

% passing No. 200 Sieve: 41%

              The soil is:

              a. A-1                   b. A-4                   c. A-2-5               d. A-7-6

9.           Classify this soil according to the Unified Soil Classification Systems.

              Liquid Limit = 42.3%

              Plastic Limit = 15.8%

                             Sieve Analysis:

Sieve Size	% Passing
No. 4	100%
No. 10	93.2%
No. 40	81.7%
No. 200	60.2%

              The soil is:

              a. CL                    b. ML                   c. SM                   d. SC

Answer 1