| ADVANCED PROCESS CONTROL |
| PAPER NO. 2 |
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| PUT ON: Dec, 2001 |
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IC-402 ADVANCED PROCESS CONTROL (B.Tech 8th Semester, 2092) Time : 3 Hours Maximum Marks : 60 NOTE:- This paper consist of Three Sections. Section A is compulsory. Do any Four questions from Section B and any two questions from Section C Section-A Marks : 20 1(a) Comment upon the stability of open loop vs closed loop system. (b) Draw a closed loop process colntrol loop. (c) What are the advantages of feedforward over feedback control ? (d) Discuss an application of autioneering control. (e) Draw standard instrumentation symbols of three way valve , pilot tube, pneumatic signal pilot light. (f) What are the salient features of DCS ? (g) Compare PLC vs PC based control systems. (h) Define an element of RGA matrix. (i) Identify the process variables for controlling Heat exchanger. (j) What is the need of adaptive control ? Section-B Marks:5 Each 2. Compare single loop vs multiloop control systems. 3. Explain the operation of Adaptive Ratio control system with the help of diagram. 4. Write a note memory and I/O section of PLC. 5. Using PI diagrams, draw simple single loop control scheme for CSTR. 6. Write a note on DCS flowsheet symbols. Section-C Marks : 10 Each 7. What is Override Control ? Apply override control scheme on steam distribution system in which high pressure is "Let down" to lower pressure levels. assume the value to be A/O. Which selector switch 8. (a) Draw a Ladder diagram for a motor to start after 2 minutes when Start switch is pressed. Allow for temperature switch to avoid overheating and for self latching after the start button is released 9. For a system described by the following (d/dt)y1 = -5y1 - 50 y2 - 4u1 (d/dt)y2 = -0.1 + 0.5y2 + 0.1 u1 - 0.05 u2 Comparethe RGA matrix and select the best pair of manipulated and controlled variable. |
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