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A big municipal utility district is considering two large-scale conduits. The first includes construction of a steel pipeline at a cost of $200 million. The pumping and other operating costs are expected to accrue to $6 million per year, increasing by 1% per year. Alternatively, a gravity flow canal can be constructed at a cost of $325 million. The O&M costs for the canal are expected to be $1million at EOY2, rising by $250,000 per year. Which conduit must be built at an interest rate of 6% if:
a) The projects are expected to last for 25 years?
b) The projects are expected to last forever?
Determine total delay, maximum queue length, and the time that the 20th vehicle to arrive waits from its arrival to its departure.
A radioactive waste from a clinical laboratory contains 0.2 μCi (microcuries) of calcium-45 (45Ca) per liter. The half-life of 45Ca is 152 days.
A soil sample was taken from a proposed cut area in a highway construction project and sent to a soils laboratory for a compaction test, using the Standard Proctor compaction procedure. Results of the test are as follows:
A consolidated-drained triaxial shear test on a normally consolidated clay yielded a drained friction angle of 28 degrees. If the confining pressure during the test was 15 psi, what was the major principal stress at failure.
Cancer is the uncontrolled growth of abnormal cells in the body resulting in tumours that can be benign or malignant (cancerous cells). A proper treatment is necessary to fight with this serious disease.
Discuss the different agencies, institutes, centers, different environmental companies that are active in UAE.
You fill a 2-cubic foot wheelbarrow to the top with aggregate. if the specific gravity of the aggregate is 2.548 and 18% of the aggregate is void spaces, how much does the aggregate in the wheelbarrow weight?
Consider a cantilever mass-less beam subjected to a concentrated mass at the tip of the beam. Assume, length L, flexural stiffness EI, and mass m.
For energy conservation, materials with a high thermal capacity are effective in climates in which the heat flow through the building envelope is:
A rectangular clarifier with a length:width ratio of 3:1 receives a flow of 850m3/day. the clarifiers depth is 4.0m and the detention time of the water inthe clarifier is 2.4 hrs, what are the surface overflow rate and the horizontal flow through ..
A company that manufactures regenerative thermal oxidizers made an investment 10 years ago that is now worth $1,300,000.
What is the maximum safe speed around the curve? If the speed limit on the roadway is 60mph, what action should be taken by the engineer?
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