The results of a compaction test on samples of soil that are to be used for an embankment on a highway project are listed below. Determine the maximum dry unit weight of compaction and the optimum moisture content.
What will be an ideal response?
For each sample, calculate the dry density and then plot the results to estimate
maximum dry unit weight and optimum moisture content, as shown below.
Dry density can be calculated using Equation 17.11.
? d = ? / (1 + w)
From the above graph, the maximum dry unit weight of the soil is approximately
102.2 lb/ft3, and the optimum moisture content is approximately 16%.
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The pressure regulator on a fuel tank _____.
a. prevents gas from backing up into the tank b. relieves excess internal pressure to keep the tank from exploding c. allows the operator to increase the working pressure in order to work faster d. reduces the high pressure in the cylinder to the lower working pressures required for cutting or welding
Used within poured-in-place concrete structures, common applications of ____ are to provide security from fire, break-ins, or noise.
A. security walls B. shear walls C. tilt-up walls D. retaining walls
List the precautions that can be taken to guard against water accumulation hazards
What will be an ideal response?
The pod of a legume is its fruit
Indicate whether the statement is true or false