Download GTU BE/B.Tech 2019 Winter 5th Sem New 2152303 Plastics Recycling And Waste Treatment Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 5th Sem New 2152303 Plastics Recycling And Waste Treatment Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? V (New) EXAMINATION ? WINTER 2019
Subject Code: 2152303 Date: 04/12/2019

Subject Name: Plastics Recycling & Waste Treatment
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Define i) Primary Recycling ii) Nuisance Plastics iii) Tertiary
Recycling
03
(b) Write the Recycling codes for i) HDPE ii) PVC iii) PET iv) PP 04
(c) With a neat flow diagram, explain the flow of plastic products and
plastic waste.
07

Q.2 (a) List and explain the sources of plastic waste. 03
(b) Explain about use of plastic waste as fillers in secondary recycling. 04
(c) Write a short note on the sink-float separation method for separating
mixtures of plastics.
07
OR
(c) Explain about granulators used in primary recycling of plastics. 07
Q.3 (a) Explain the waste management of plastics with four R?s. 03
(b) Discuss with a neat flow diagram the inline automatic recycling
system for primary recycling of waste plastics.
04
(c) List the methods of separating paper/plastic mixture and explain any
one.
07
OR
Q.3 (a) Explain the properties used as a basis of separation for separating
plastic, wood, paper, glass & metallic waste.
03
(b) List the problems encountered in incineration of pure plastic waste. 04
(c) With a neat sketch, explain the Union Carbide?s cryogenic grinding
system used to granulate granulating difficult materials.
07
Q.4 (a) Discuss the technical problems encountered in primary recycling of
plastics.
03
(b) Explain the types of pyrolysis system used for pyrolysing municipal
solid waste.
04
(c) How is co-extrusion & co-injection technique helpful in the
secondary recycling of plastics.
07
OR
Q.4 (a) Write a short note on PVS scrap recycling. 03
(b) What is Landfill? Explain the Sanitary Land filling in brief. 04
(c) Define pyrolysis. List advantages of Pyrolysis. Write the principal
reactions involved in pyrolysis process.
07
Q.5 (a) List the technical problems encountered in pyrolysis of plastics. 03
(b) Explain the recycling of PET by chemical decomposition techniques
through tertiary recycling.
04
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1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? V (New) EXAMINATION ? WINTER 2019
Subject Code: 2152303 Date: 04/12/2019

Subject Name: Plastics Recycling & Waste Treatment
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Define i) Primary Recycling ii) Nuisance Plastics iii) Tertiary
Recycling
03
(b) Write the Recycling codes for i) HDPE ii) PVC iii) PET iv) PP 04
(c) With a neat flow diagram, explain the flow of plastic products and
plastic waste.
07

Q.2 (a) List and explain the sources of plastic waste. 03
(b) Explain about use of plastic waste as fillers in secondary recycling. 04
(c) Write a short note on the sink-float separation method for separating
mixtures of plastics.
07
OR
(c) Explain about granulators used in primary recycling of plastics. 07
Q.3 (a) Explain the waste management of plastics with four R?s. 03
(b) Discuss with a neat flow diagram the inline automatic recycling
system for primary recycling of waste plastics.
04
(c) List the methods of separating paper/plastic mixture and explain any
one.
07
OR
Q.3 (a) Explain the properties used as a basis of separation for separating
plastic, wood, paper, glass & metallic waste.
03
(b) List the problems encountered in incineration of pure plastic waste. 04
(c) With a neat sketch, explain the Union Carbide?s cryogenic grinding
system used to granulate granulating difficult materials.
07
Q.4 (a) Discuss the technical problems encountered in primary recycling of
plastics.
03
(b) Explain the types of pyrolysis system used for pyrolysing municipal
solid waste.
04
(c) How is co-extrusion & co-injection technique helpful in the
secondary recycling of plastics.
07
OR
Q.4 (a) Write a short note on PVS scrap recycling. 03
(b) What is Landfill? Explain the Sanitary Land filling in brief. 04
(c) Define pyrolysis. List advantages of Pyrolysis. Write the principal
reactions involved in pyrolysis process.
07
Q.5 (a) List the technical problems encountered in pyrolysis of plastics. 03
(b) Explain the recycling of PET by chemical decomposition techniques
through tertiary recycling.
04
2
(c) Explain the parts of a typical incinerator with a neat sketch. 07
OR

Q.5 (a) Explain the recycling of HDPE containers with a flow diagram. 03
(b) Draw only the flow diagram to separate plastic from plastic coated
fibre.
04
(c) Write a short note on Environmental Implications for recycling of
plastics.
07

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