Classification $-$

Using the USCS criteria in USBR $5005,$ determine the soil classification of each sample.

Size Fractions:

Coarse gravel

$\frac{3}{4}$ to $3$ inches

Fine gravel

No$.4$ sieve $(4\mathrm{.}75mm)$ to $\frac{3}{4}$ inch

Coarse sand

No$.10(2$ mm $)$ to No$.4$ sieve $(4\mathrm{.}75$ mm $)$

Medium sand

No$.40(0\mathrm{.}425$ mm $)$ to No$.10$ sieve $(2$ mm $)$

Fine sand

No$.200(0\mathrm{.}075$ mm $)$ to No$.40$ sieve $(0\mathrm{.}425mm)$

Fines $($clay or silt$)$

Below $200$ sieve $(0\mathrm{.}075mm)$

GROUP NAME

Figure $2.-$ Flowchart for identifying coarse$-$grained soils $($less than $50\%$ fines$)-$ visual$-$manual method.

GROUP SYMBOL

Figure $1$a$.-$ Flowchart for identifying inorganic fine$-$grained soil $(50\%$ or more fines$)-$ visual$-$manual method.

Write the classification $($s$)$ into the Grain Size Distribution Chart for each sample.

GROUP SYMBOL

GROUP NAME

Figure $1$b$.-$ Flowchart for identifying organic fine$-$grained soil $(50\%$ or more fines$)-$ visual$-$manual method.

Using the graphs from the right, please solve the $3$ questions on the left page. The questions are highlighted in red. Read the instructions carefully and please solve all parts. If you follow instructions, you will get an upvote! Thank you.