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2003 Course Process Dynamics & Control

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Total No. of Questions : 12] P1011 [Total No. of Pages : 3 [3664]-272 B.E. (Chemical) PROCESS DYNAMICS AND CONTROL (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer 3 questions from Section-I and 3 questions from Section-II. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of electronic pocket calculator is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) Derive the Input-Output model for a Stirred Tank Heater. [8] b) What are various forcing functions to study the dynamic response of a system? Explain with neat sketches. [10] OR Q2) a) Compare simple feedback and feedforward control configurations based upon performance alongwith proper justifications. [8] b) What are SISO and MIMO systems? Give examples of chemical processes for both the systems. [10] Q3) a) Study the response of a first order lag to a unit impulse input. [8] b) Show that a tank with variable cross sectional area along its height also has variable time constant and static gain. [8] OR Q4) a) A first order process is described by a transfer function: G ( s) = 1 1 + p .s Establish the time response for unit step change in input. [6] P.T.O.

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