Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER- VIII (New) EXAMINATION — WINTER 2019
Subject Code: 2182604 Date: 29/11/2019
Subject Name: Automation & control in Rubber Industries
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
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- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q.1 (a) List out static characteristics of instrument. Define any two. 03
(b) Give any four symbols used in instrumentation diagram. 04
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(c) Explain the fundamental elements of an instrument. 07
Q.2 (a) Which general considerations are made for quality control in rubber industry? 03
Q.2 (b) Write a short note on material specification. 04
Q.2 (c) Discuss the problems with microcomputer in data acquisition and analysis. 07
OR
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Q.2 (c) Which methods are available to design the rubber processing trials? Explain any one in detail. 07
Q.3 (a) Draw different configurations of thermistors. 03
Q.3 (b) List out the different elastic pressure transducer. Write on any one. 04
Q.3 (c) Discuss in detail about forced induced variation in calendered gauge. 07
OR
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Q.3 (a) Write major components of electrical pressure transducer. 03
Q.3 (b) Give the name of the device which is used to measure the temperature of rubber compound. Also write on that. 04
Q.3 (c) Discuss in detail about mechanically induced variation in calendered gauge. 07
Q.4 (a) Explain the step forcing function. 03
Q.4 (b) How the screw speed measurement is carried out during extrusion process? 04
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Q.4 (c) Discuss the dynamic behavior of first order control system by taking suitable example. 07
OR
Q.4 (a) Explain the impulse forcing function. 03
Q.4 (b) Write a short note on different pressure transducers used to measure die head pressure during extrusion process. 04
Q.4 (c) Explain the servo mechanism control problem for positive feedback system and negative feedback system respectively by following block diagram algebra. 07
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Q.5 (a) Give the importance of the LAN in rubber industries. 03
Q.5 (b) Write a note on comparator. Which terms are used in controlled configurations? 04
Q.5 (c) Compare hydraulic controller and pneumatic controller. 07
OR
Q.5 (a) List the hardware steps necessary to bring information from rubber testing equipment sensor to microcomputer. 03
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Q.5 (b) Derive the transfer function for P-Controller and PD-Controller respectively. 04
Q.5 (c) Discuss the dynamic behavior of pneumatic control valve. 07
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