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GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-V (NEW) EXAMINATION — WINTER 2020
Subject Code:3152303 Date:01/02/2021
Subject Name:Plastic Recycling & Waste Management
Time:10:30 AM TO 12:30 PM Total Marks: 56
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Instructions:
- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
MARKS
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Q.1 (a) Define and explain in short about (i) Post consumer plastics waste (ii) Thermoplastics and Thermoset plastics (iii) Scrape plastic. 3
(b) Discus the flow of plastic waste. 4
(c) Explain the generation of industrial plastic waste and concept of 4R. 7
Q.2 (a) Write the recycling codes for various plastics. 3
(b) Explain Separation of plastics from Plastic-coated fabric. 4
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(c) Explain the various separation techniques in detail. 7
Q.3 (a) Define the primary recycling. 3
(b) Write short notes on Granulators. 4
(c) Explain the Cryogenic Grinding, and reprocessing low Bulk density plastic waste with plunger and screw type of stuffer. 7
Q.4 (a) Define the secondary recycling. 3
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(b) Write short notes on Equipment Required for secondary recycling. 4
(c) Explain Secondary Recycling by Co-extrusion and Co-injection Molding. 7
Q.5 (a) Define the Tertiary Recycling. 3
(b) Write short notes on Chemical decomposition of plastics waste. 4
(c) Explain the Pyrolysis of plastic waste with suitable diagram and reactions. 7
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Q.6 (a) Define the Incineration. 3
(b) Write short notes on medical plastic waste. 4
(c) Explain the Incineration of plastics waste and Problems associated with incineration of plastic waste. 7
Q.7 (a) Explain in short the disposal of waste plastics without the recovery of value. 3
(b) Draw the diagram of Mitsubishi Reverzer. 4
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(c) Explain the Recycling of medical waste in detail. 7
Q.8 (a) Explain the Recycling of Medical Plastic Waste? 3
(b) Explain the recycling of PET. 4
(c) Explain the Environmental Implications of Recycling & Polymer Degradation. 7
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