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2003 & 1997 Course Process Instrumentation - II

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Total No. of Questions : 12] P1123 [Total No. of Pages : 2 [3664]-250 B.E. (Instrumentation & Control) PROCESS INSTRUMENTATION - II (1997 & 2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions : 1) Answer any 3 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) Your answers will be valued as a whole. 6) Assume suitable data, if necessary. SECTION - I Q1) a) b) For a typical chiller, you are supposed to configure a industry standard PID controller. Explain controller configuration procedure for the same. Which different parameters you will enter in the controller? [9] Apply instrumentation for a heat exchanger which will implement following equation : [9] Q = k (T2 T1 ) Where Q = change in steam flow rate. Q2) a) b) Q3) a) b) T2 = exit temperature of fluid. T1 = inlet temperature of fluid. k = constant. Draw instrumentation scheme. OR How heat exchangers are classified? Explain any one instrumentation scheme for heat exchanger. [9] What shall be fail-safe actions of the valves used in Chillers and Heatexchangers? Justify your answer. [9] What are difficulties in controlling CSTR? How they are overcome? [8] Compare controlling a CSTR with PLC (Programmable Logic Controller) and a multiloop PID controller. [8] OR P.T.O. Q4) a) b) Q5) a) b) Q6) a) b) What is difference between cold startup and hot startup of a CSTR? What is runaway reaction? [8] How reactor safety can be assured? Explain. [8] Explain a typical water distribution system using pump instrumentation.[8] Which factors shall be taken into consideration for Q5) a)? Explain in detail. [8] OR Explain different types of compressors in detail. Also enlit their control methods. Explain any one. [8] Give specifications of a typical compressor. [8] SECTION - II Q7) Enlist different control loops in Boiler Instrumentation. Explain any four in details. [16] OR Q8) a) How turbine instrumentation is important? Explain with speed as a particular parameter. [8] b) How following types of optimization are implemented / taken into consideration with reference to Boilers : i) Fuel side optimization. ii) Water side optimization. Explain. [8] Q9) a) b) Q10)a) b) Explain Auctioneering in a typical distillation column control system with diagram. [8] Why distillation column control is considered as most complex? Explain. [8] OR How feed forward control of distillation column will be implemented? Explain with block diagram. [8] Write a note on Role of Analyzers in distillation column control. [8] Q11) a) Enlist different dryer types. Explain any one in detail with instrumentation scheme. [9] b) [9] How crystallizers are controlled? Explain with block diagram. OR List manipulated variables and controlled variables in Evaporators. [9] How multieffect evaporation is achieved? Where are evaporators used?[9] Q12)a) b) rrr [3664]-250 -2-

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