GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VI (NEW) EXAMINATION - WINTER 2018
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Subject Code:2162303 Date:16/11/2018Subject Name:Plastic Process Instrumentation and Process Control
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
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2. Make suitable assumptions wherever necessary.3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Explain sources of error. 03
(b) Explain open loop control system with neat diagram. 04
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(c) Explain block diagram of instrumentation process with neat sketch. 07 Q.2 (a) Define Range, Precision & Accuracy. 03
(b) Define Calibration & explain general steps to perform it. 04
(c) Explain diaphragm pressure transducers with neat diagram. 07
OR
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(c) Explain construction, working, advantages & disadvantages of LVDT. 07
Q.3 (a) Explain closed loop transfer function. 03
(b) Explain CASCADE control system. 04
(c) Explain Strain gauge pressure transducers with neat diagram. 07
OR
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Q.3 (a) Explain open loop transfer function. 03
(b) Describe piezoelectric pressure transducer. 04
(c) Explain different types of Manometers? 07
Q.4 (a) Explain derivative controllers. 03
(b) Explain C type bourdon tube transducer. 04
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(c) Explain Radiation pyrometer with neat sketch. 07OR
Q.4 (a) Explain proportional controllers. 03
(b) Explain basic elements of closed loop system. 04
(c) Explain Capacitive type pressure transducer. 07
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Q.5 (a) Explain open loop control system with neat diagram 03
(b) Explain Seeback effect & thermocouple. 04
(c) Explain the total injection molding process control 07
OR
Q.5 (a) Explain thermistors? 03
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(b) Write a short note on static characteristics. 04(c) Describe the advantages and disadvantages of filled system thermometer with neat sketch. 07
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