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2003 Course Process Instrumentation (Elective I)

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Total No. of Questions :12] P1072 [Total No. of Pages :3 [3864]-246 B.E. (Electronics) PROCESS INSTRUMENTATION (Elective-I)(2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answers to the two sections should be written in separate books. 2) Neat diagrams must be drawn wherever necessary 3) Figures to the right indicate full marks. 4) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 5) Assume suitable data, if necessary. SECTION - I Q1) a) With suitable example, distinguish between Servo Problem and Regulator Problem in Process Control. [6] b) Draw the block diagram of a SMART TRANSMITTER for Temperature measurement. Explain the function of each block. [10] OR Q2) a) Using an RTD with temperature coefficient of resistance 0.0039/ C, design a signal conditioning with bridge and Instrumentation amplifier to provide 0-5V output for a 20 C 100 C Temperature variation. The RTD dessipation constant is 28mw / C. [10] b) Explain any one optical method for the measurement of displacement.[6] Q3) a) Explain the following terms with reference to a control valve i) b) Cavitation. ii) Flashing. [6] [10] A liquid level system converts 4 10m level into 4 20mA Current. Design a three mode controller that outputs 0 5V with 50% PB, 0.03min Reset time and 0.05 min derivative time. Fastest expected time change is 0.8 min. P.T.O.

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