Download GTU BE/B.Tech 2019 Summer 6th Sem New 2162308 Advance Plastics Processing Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem New 2162308 Advance Plastics Processing Previous Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2162308 Date:16/05/2019
Subject Name:Advance Plastics Processing
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) Which are the advantages and limitations of RIM process? 03
(b) Explain calendar roll arrangement with diagram. 04
(c) Explain the process steps of Reaction Injection molding
Technique.
07

Q.2 (a) What is open cell and closed cell foam? Discuss. 03
(b)
Differentiate between extrusion blow molding and injection blow molding
techniques.
04
(c) Write a note on: Parison Programming. 07
OR
(c)
Write a note on: Electroplating.
07
Q.3 (a) Define: K factor, Nip gap, Cellular Plastics. 03
(b) What is Color concentrates for thermoplastics? Discuss. 04
(c) What is structural foam molding? Give advantages and limitations of
structural foam molding.
07
OR
Q.3 (a) Discuss flexographic printing process for plastic film. 03
(b) Explain encapsulation process and give its applications. 04
(c)
With neat diagram explain calendaring process along with its applications.
07
Q.4 (a) What is the function of blowing agent? Discuss various blowing agents
used in foam.
03
(b) Explain Hot foil stamping process along with its applications. 04
(c) Explain the vacuum metalizing process with a neat sketch along with its
applications.
07
OR
Q.4 (a) Explain In- mold decoration technique for plastics. 03
(b) Discuss (i) Cellular PE foam (ii) Crosslinked PE (XLPE) foam. 04
(c) How PU foam is prepared? Explain its process and give its applications. 07
Q.5 (a) Give any three molding defect, causes and remedies for Calendaring
process.
03
(b) Explain the steps in rotational molding process. 04
(c) What is Casting? List various Plastic materials that can be cast. Explain
PMMA sheet preparation by casting.
07
OR

Q.5 (a) List various heating systems for Calendar rolls. Explain any one heating
system for calendar rolls.
03
(b) List various printing techniques on Plastics. Explain Rotogravure printing
process for plastic films.
04
(c) Explain (i) Fluidized bed and (ii) Electrostatic fluidized fluidized coating
technique.
07

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