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Crude oil flows through a level section of the Alaskan pipeline at a rate of 1.6 million barrels per day (1 barrels=42 US gallons) the pipe inside diameter is 48 inch and its roughness is equivalent to galvanized iron. The maximum allowable pressure is 1200 psi. At the pumping temperature of 140F, the crude oil has S.G 0.93 and a viscosity of 16.75cP, and a vapour pressure of 50 psi.
a)for these conditions, determine the maximum possible spacing between pumping stations(i.e the pipeline will consist of repeating pump-pipe sections to meet the above mentioned criteria)
b) Next, if the pump efficiency is 85%, determine the power that must be supplied to the pump at each pumping station( assume pump friction is negligible)
a. What is this investment's external rate of return b. What is the decision rule for judging the attractiveness of investments based on external rate of return c. Should Aerotron Electronics buy the water filtration system
the flow into the lake is from is from a stream is 300 m3/d andthe flow into the lake from runoff averages 20 m3/d. The lake is used for fishing by the local residents but the pesticides from local farms may damage the fish population.
A completely mixed retention basin is used to treat an industrial waste water consisting of a non-conservative pollutant, using a reaction that destroys the pollutant according to first-order reaction kinetics, with k = 0.216/day.
Describe three different ways to generate random numbers and explain for each of the four properties (from (a0) which is “yes” and which is “no”.
Simplify the shape of the base and the 4 legs and estimate the minimum number of tugs needed to tow the structure at the required speed. The most powerful tugs can produce a thrust of approximately 2000kN,i.e.200tons.
A thin flat plate is 12 m long and 8 m wide. The air density is 1.23 kg/m3. a) What is the maximum velocity for the boundary layer to remain laminar over the entire plate (the transition occurs at the end of the plate)
a child is flying a kite at a height of 40 ft and the kite is moving horizontally at a rate of 3 ft/sec. if the string is taut, at what rate is the string being paid out when the length of the string is 50 feet.
What are the specifications need to be specified while creating a design for waterways?what are their uses?how are they maintained?
A tray rests on an extendible arm consisting of two steel tubes with two different outer diameters. The downward force at the tray center F0 = 1000 N. Determine the downward deflection of the tray center and the tilt angles of the tray about each ..
jar tests were perfomed on untreated river water. an optimum dose of 12.5 mg/L of alum was determined. determine the amount of natural alkalinity (mg/L as CaCO3) consumed.
a rectangular beam made using concrete with fc 6000 psi and steel with fy60000 psi has a width b 20 in. the concrete
What is the diameter of a circular concrete column needed to support a load of 300,000 pounds with a factor of safety of 2. Round the diameter up to the whole inch. The concrete ultimate strength is 3000 lb/in^2.
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