Which type of pneumatic control valve is used mostly Either Air to Open r Air to close the value And guys I need reason for your reason

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What step should be taken in process industries if the process variable is oscillating?

0 Answers   HPCL,

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Hi, I am preparing for Indian Forest Service (UPSC). Can you please help me to get previous years question papers (Chemcial Engineerign) (atleast 5).

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Suppose you have hot fluid and cold water, what fluid you should flow in shell side and tube side in a shell and tube heat exchanger and why

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Question 65 – A differential equation is given as y” + 5y’ + 6y = 0, y(0) = 2 and y’(0) = 3. By using Laplace transform, an engineer has correctly produced the equation L {y} = (2s + 13) / [(s + 2)(s + 3)] = A / (s + 2) + B (s + 3). (a) Find the values of A and B. (b) The inversed Laplace transform of 1 / (s + a) is given by exp (-at) where a is a constant. If the statement : L {y} = 9 L { exp (-2t) } - 7 L { exp (-3t) } is correct, find the equation of y as a function of t as a solution to the differential equation stated in the beginning of this question. When L {d} = 9 L {b} - 7 L {c}, then d = 9b - 7c with b, c and d are unknowns.

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Explain the difference between cfm (cubic feet per minute) and scfm (standard cubic feet per minute)?

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Experiment constitutes 1000 ml of 10 ppm dye solution and 0.2 g catalyst mixed in beaker. How to calculate the initial of concentration?

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The process conditions of the fuel gas are as follows: Temperature = 25 deg C Pressure = 4 bar g Calculate the line size for the fuel gas supply line to the superheater

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Define viscosity?

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Is there a handy way to determine if a horizontal pipe is running full if the flow rate is known?

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What are some good strategies for curing tube vibration in shell and tube exchangers?

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Why catalyst is charging in chemical reaction as high pressurized pellet of tablet?

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