Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 4th Sem New 2142301 Basic Plastic Processing And Thermal Engineering Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2142301 Date: 22/11/2018
Subject Name: Basic Plastic Processing and Thermal Engineering
Time: 02:30 PM TO 05:00 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) (1) What do you mean by breathing in compression
molding?
(2) PET bottles are manufactured by ___________
process.
(3) Define conduction
03
(b) (1) Define plastic processing.
(2)Wastage is less in injection blow molding than
extrusion blow molding. (True or False)
(3) What is a parison?
(4) Insert molding can be done by transfer molding
process. (True/False)
04
(c) Write a short note on plug assist vacuum forming
technique.
07
Q.2 (a) What is bulk factor? Explain in brief. 03
(b) List four points of difference between thermoplastics &
thermosets.
04
(c) List the advantages and disadvantages of rotational
molding process.
07
OR
(c) Explain the plunger type transfer molding process with a
neat sketch.
07
Q.3 (a) List the steps in compression molding. 03
(b) What are performs? Advantages of preforms in
compression molding.
04
(c) List the types of molds in compression molding and
explain any one.
07
OR
Q.3 (a) What is breathing and why is it important in compression
molding process?
03
(b) List the material characteristic require for thermoforming
process.
04
(c) With a neat sketch explain pot type transfer molding
process.
07
Q.4 (a) List the types of heat exchanger and explain any one. 03
(b) Explain the pressure forming process. 04
(c) Write a short note on parison programming. 07
OR
Q.4 (a) Compare blow molding process with rotational molding. 03
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2142301 Date: 22/11/2018
Subject Name: Basic Plastic Processing and Thermal Engineering
Time: 02:30 PM TO 05:00 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) (1) What do you mean by breathing in compression
molding?
(2) PET bottles are manufactured by ___________
process.
(3) Define conduction
03
(b) (1) Define plastic processing.
(2)Wastage is less in injection blow molding than
extrusion blow molding. (True or False)
(3) What is a parison?
(4) Insert molding can be done by transfer molding
process. (True/False)
04
(c) Write a short note on plug assist vacuum forming
technique.
07
Q.2 (a) What is bulk factor? Explain in brief. 03
(b) List four points of difference between thermoplastics &
thermosets.
04
(c) List the advantages and disadvantages of rotational
molding process.
07
OR
(c) Explain the plunger type transfer molding process with a
neat sketch.
07
Q.3 (a) List the steps in compression molding. 03
(b) What are performs? Advantages of preforms in
compression molding.
04
(c) List the types of molds in compression molding and
explain any one.
07
OR
Q.3 (a) What is breathing and why is it important in compression
molding process?
03
(b) List the material characteristic require for thermoforming
process.
04
(c) With a neat sketch explain pot type transfer molding
process.
07
Q.4 (a) List the types of heat exchanger and explain any one. 03
(b) Explain the pressure forming process. 04
(c) Write a short note on parison programming. 07
OR
Q.4 (a) Compare blow molding process with rotational molding. 03
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2
(b) What is pinch- off in blow molding. 04
(c) Differentiate between injection blow molding and
extrusion blow molding.
07
Q.5 (a) List any three defects occurring in blow molding and give
its causes and remedies.
03
(b) Enlist the advantages and disadvantages of transfer
molding process.
04
(c) Explain the Injection blow molding process. 07
OR
Q.5 (a) Define convection & radiation. Explain Fourier?s law of
heat transfer.
03
(b) Explain rotational molding process briefly. 04
(c) Discuss the steps in compression molding process along
with advantages and disadvantages.
07
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This post was last modified on 20 February 2020