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1997 Course Process Dynamics & Control

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Total No. of Questions :8] P1134 [Total No. of Pages : 3 [3864] - 87 B.E.(Chemical) PROCESS DYNAMICS & CONTROL (1997 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer any three questions from each section. 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 logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) Explain the functions of feedback control system. [6] b) A mercury thermometer at 25oC is suddenly dipped in boiling water. If time constant of the thermometer is 20 sec, find the temperature reading after 5, 10, 15 & 20 seconds. [6] c) Define: i) Proportional gain of P-controller. ii) PB of P-controller. iii) Reset time of PI- controller. iv) Rate time of PD-controller. v) Dead time. vi) [6] Time constant of thermometer. P.T.O.

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