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2003 Course Process Instrumentation - I

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Total No. of Questions : 12] P1356 [Total No. of Pages : 3 [3764] - 281 B.E. (Instrumentation & Control) PROCESS INSTRUMENTATION - I (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer three questions from Section - I and three 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 logarithmic tables slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. SECTION - I Q1) a) b) Elaborate Control Valve Capacity Testing. [8] Differentiate between Source treatment and path treatment for reducing control valve noise. [8] OR Q2) a) b) Q3) a) b) With the help of necessary equations explain control valve pneumatic actuator design. [8] Comment on the valves used for high temperature and high pressure applications. [8] Substantiate single capacity processes are easiest to control . Explain the following terms : i) Interacting Lags. ii) Quarter Amplitude Damping. [8] [8] OR P.T.O. Q4) a) b) Q5) a) b) Describe step analysis method for finding single time constant of a process. [8] Compare self regulating and non-self regulating processes. [8] What are the methods of Ratio Control? Why ratio calculations are done outside the control loop? [9] Compare feedback and feed-forward control system. [9] OR Q6) a) b) Describe with suitable application the Cascade Control. [9] With the help of a suitable diagram explain Split Range Control. [9] SECTION - II Q7) a) b) What are the desired qualities of a non linear controller. Explain with suitable examples. [9] Elaborate analysis of a typical Flow Control Loop. [9] OR Q8) a) Compare SLPC and MLPC. [9] b) Define the term Scaling . What is its necessity in Process Control? Explain the various steps involved in Scaling . [9] Q9) a) With the help of a neat block diagram explain the working of MRAC . [8] b) What is Self Tuning Controller ? Explain its advantages and shortcomings. [8] OR [3764]-281 2 Q10)a) Explain the use of optimal controller to improve the performance of a process. [8] b) Explain the terms Steady state adaptive system and Dynamic adaptive system with reference to Adaptive Control. [8] Q11)a) With the help of suitable examples explain the need of advance process control techniques. [8] b) Explain the terms Fuzzifier and Defuzzifier w.r.t. Fuzzy Controller. [8] OR Q12)a) Explain the applications, merits and demerits of ANN based controller. [8] b) Explain the techniques for analysis of process control performance using SPC. [8] vvvv [3764]-281 3

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