$[-/1$ Points$]$

DASPRINCGEOENG$10$SI $6.$CQ$.005$

Laboratory soil compaction tests are used to obtain which of the following?

the decrease in volume of the soil

the maximum unit weight of the soil

the optimum moisture content of the soil

both the second and third options

Need Help?

$9.[-/1$ Points$]$

DASPRINCGEOENG$10$SI $6.$CQ$\mathrm{.}008.$

In the standard Proctor compaction test, the mass of the hammer is how many kilograms?

$2\mathrm{.}5$

$4\mathrm{.}536$

$5$

$10$

Need Help?

$10.[-/1$ Points$]$

DASPRINCGEOENG$10$SI $6.$CQ$\mathrm{.}010.$

The number of hammer blows for each soil layer in the standard Proctor compaction test is kept at how many?

$25$

$50$

$75$

$100$

Need Help?

$11.[-/1$ Points$]$

DASPRINCGEOENG$10$SI $6.$CQ$\mathrm{.}012.$

A compaction curve is the plot of which of the following?

bulk unit weight versus moisture content

dry unit weight versus moisture content

maximum dry unit weight versus optimum moisture content

none of the above

Need Help?

$12.$ Points$]$

An earthen dam is constructed from a soil with a compacted saturated unit weight of $20k\frac{N}{m}3.$ There is a difference in total head of $3m$ between the upstream and downstream side of the dam. The flownet for the dam has a total of $8$ equipotential drops and the mean length of the smallest square in the flownet is $0\mathrm{.}9m.$ Taking the unit weight of water $=9\mathrm{.}81k\frac{N}{m}3,$ the factor of safety against piping due to boiling is closest to $---$Select$---$ hat$(v)$

$13.$ Points$]$

A sheetpile wall is embedded $4m$ into a dense sandy silt having a saturated unit weight of $20k\frac{N}{m}3.$ There is a difference in total head of $4\mathrm{.}5m$ between ground level and the excavated side of the sheetpile. A flownet is drawn to evaluate the seepage conditions around the pile $-$ the flownet has a total of $10$ equipotential drops and the mean number of drops that have occured at the mid point of the base of the soil prism subject to heave is $5\mathrm{.}5.$ If a depth of $0\mathrm{.}5m$ of water remains on the excavated side of the sheetpile and taking the unit weight of water equal to $9\mathrm{.}81k\frac{N}{m}3$ the factor of safety against piping due to heave is approximately $---$Select$---$ hat$()$