and that results from Atterberg Limits testing yielded a liquid limit $($LL$)$ of $67$ and a plastic of $41.$

$21.$ The percentage of sand $($by weight$)$ of the sample shown in Attachment $"A"$ is most nearly which of the following?

a$.40\%$

d$.70\%$

b$.50\%$

e$.80\%$

c$.60\%$

f$.90\%$

$22.$ The coefficient of curvature $(c_c)$ for the sample shown in Attachment $"A"$ falls within which of the following ranges?

a$.$ Less than $1\mathrm{.}0$

d$.2\mathrm{.}35$ to $2\mathrm{.}60$

b$.1\mathrm{.}35$ to $1\mathrm{.}55$

e$.2\mathrm{.}60$ to $2\mathrm{.}90$

c$.1\mathrm{.}85$ to $2\mathrm{.}05$

f$.$ Greater than $3\mathrm{.}0$

$23.$ The coefficient of uniformity $(C{u}_u)$ for the sample shown in Attachment $"A"$ falls within which of the following ranges?

a$.$ Less than $1\mathrm{.}0$

d$.3\mathrm{.}88$ to $4\mathrm{.}00$

b$.1\mathrm{.}88$ to $2\mathrm{.}17$

e$.4\mathrm{.}78$ to $5\mathrm{.}02$

c$.2\mathrm{.}60$ to $2\mathrm{.}90$

f$.$ Greater than $6\mathrm{.}0$

$24.$ The median grain size of the sample shown in Attachment $"A"$ is most nearly which of the following?

d$.0\mathrm{.}24mm$

a$.0\mathrm{.}15cm$

e$.0\mathrm{.}24cm$

b$.0\mathrm{.}15mm$

f$.0\mathrm{.}31mm$

c$.0\mathrm{.}50cm$

$25.$ The effective grain size of the sample shown in Attachment $"A"$ is most nearly which of the following?

d$.,0\mathrm{.}074mm$

a$.0\mathrm{.}0025mm$

e$.0\mathrm{.}005mm$

b$.0\mathrm{.}025cm$

f$.0\mathrm{.}008cm$

c$.425m$