GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VI (OLD) EXAMINATION - WINTER 2018
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Subject Code:161702 Date: 04/12/2018
Subject Name: Process Control
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) Classify the controller on the basis of modes of controller. Explain in detail [07]
(b) Write a note on necessity, importance and requirement of process control [07]
Q.2 (a) What is feedback control? Write the elements of feedback control system with necessary figure [07]
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(b) What are the approaches to control [07]
OR
(b) What are the types of modelling? Also how to linearize the non linear system [07]
Q.3 (a) Give the example of temperature-flow cascade control system. Explain the design criteria for the cascade control [07]
(b) What do you mean by offset in case of proportional controller mode? How offset can be eliminated? How PI control is better than only P controller? [07]
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OR
Q.3 (a) Explain feedback-feedforward control scheme with example? [07]
(b) Discuss floating control mode in detail [07]
Q.4 (a) Explain the composite PI Controller with equation, transfer function and draw the response of PI controller to step input of error. Clarify the unit of gain of Ki. [07]
(b) Write notes on ratio control [07]
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OR
Q.4 (a) Enumerate feed forward control scheme with neat application diagram. [07]
(b) Explain the Zeigler Nichols method of controller tuning with example. [07]
Q.5 (a) Explain static error, velocity error and offset [07]
(b) Explain split range control operation in detail [07]
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OR
Q.5 (a) Implement the Integral (I) control mode using operational amplifiers circuits [07]
(b) Explain selective control with suitable example [07]
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