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1. A brine solution is used as a cooling medium in a steel heat exchanger. The brine is circulated within the heat exchanger and contains some dissolved oxygen. Suggest three methods, other than cathodic protection, for reducing corrosion of the steel by the brine. Explain the rationale for each suggestion.
2. Suggest an appropriate material for each of the following applications, and, if necessary, recommend corrosion prevention measures that should be taken. Justify your suggestions.
(a) Laboratory bottles to contain relatively dilute solutions of nitric acid
(b) Barrels to contain benzene
(c) Pipe to transport hot alkaline (basic) solutions
(d) Underground tanks to store large quantities of high-purity water
(e) Architectural trim for high-rise buildings
The Young's modulus of steel is higher than that of Al (29.0 x 106 psi vs. 10.5 x 106 psi). However, for many applications such as automotive and aerospace a more important quantity is the "specific modulus," or modulus/density. Determine the speci..
consider a steam power plant that operates between the pressure limits of 10 mpa and 20 kpa. steam enters the pump as
The lever BCD is hinged at C and attached to a control rod at B. If P = 100 lb, determine the tension in rod AB and the reaction at C, using both the graphical method and the analytical method base on force decomposition.
a 3000 kg car a and 15000 kg freight car b are moving towards each other with velocities 20 kmh and 10 kmh
determine: (a) the cutting time to complete the facing operation, (b) the cutting speeds and metal removal rates at the beginning and end of the cut.
1-what are the adavanteges and disadvantages of project managment?2-what are the key charactristics all project
Calculate the magnitude and direction of the torque required to hold the gearbox stationary (holding torque Th). Show the direction of the holding torque applied to the shaft with the aid of a sketch.
A steam powered catapult on an aircraft carrier sends a 60,000-lb aircraft 250 feet, from zero to 180 mph. Assuming that the acceleration is constant, A) determine the time for taxing. B) Determine the acceleration of the aircraft. C) Determine the f..
2kg of an ideal gas for which Cp=0.895 KJ/kg-k and Cv =0.706 KJ/kg-k is contained in a rigid, insulated container at 2 bar, 400K. A stirrer driven by an external motor is operated within the vessel until the pressure becomes 4bar. Determine, the fina..
explore the n2nono2 equilibrium in ambient atmosphere p 1 atm t 25 oc after the oxides no and no2 have been produced
Consider heat transfer through a wall comprised of two solid layers, each 4m x 4m. When perfect contact is maintained between the layers, the steady state temperature profile across the wall might look like that shown below
given the following stress components sigma x 12000 psi sigma y 8000 psi sigma z -6000 psi sigma xy 9000 psisigma yz
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