Explain why is post-weld heat treatment (stress relieving) sometimes necessary for welded vessels?

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When an expansion is joint needed on the shell side of a shell and tube heat exchanger?

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why traction voltage is 25kv

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PROCESS DESIGN - EXAMPLE 21.3 : According to a heuristic of chemical engineering plant design, assume a pressure difference dP = 4 psi for each 10-ft rise in elevation. A pump is needed to pump liquid from a storage tank at a lower elevation to a heating tank at a higher elevation with the elevation difference of 60 ft. (a) Find the pressure loss due to such elevation. (b) If the required minimum inlet pressure to the heating tank is 9 psi, with 1 control valve is installed between pump and heating tank, what is the dP minimum required for the control valve and the entrance to the heating tank when the heuristic mentions that at least 10 psi is required for the control valve? (c) The pressure at the inlet of the pump is 8 psi and the flowrate of the liquid produces pressure head of 50 psi. What is the total pressure produced by the pump? (d) Assume a pipeline dP of 2 psi / 100 ft for liquid flow in a pipe according to heuristic, what is the approximate maximum length of the pipe in ft that can be installed between the pump and the heating tank?

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ACCOUNTING AND FINANCIAL ENGINEERING - EXAMPLE 34.26 : In a construction accounting for a biochemical processing plant, $A has been spent to date, and another $B is expected required to complete the construction project. The biochemical processing plant is expected to generate a total revenue of $C. Calculate the : (a) estimated total costs; (b) percentage completion of project; (c) total estimated profit; (d) profit to date.

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which reformer efficiencywise best?

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What are the different types of equipments for the conveyance of solids?

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have any one question paper of institute of plasma research center for aptitute as well as technical?

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Name some common causes of control valve noise?

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Explain what types of metals are typically removed via chemical precipitation?

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What are the apt definitions for apparent power, active power and reactive power? Explain about different types of lamps?

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i am appearing in railway section engg. exam of chemical eng. therefore i want previous papers and study material of chemical eng.

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