Download GTU B.Tech 2020 Winter 6th Sem 2162307 Testing And Identification Of Plastic Materials Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 6th Sem 2162307 Testing And Identification Of Plastic Materials Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VI (NEW) EXAMINATION ? WINTER 2020
Subject Code:2162307 Date:22/01/2021
Subject Name:Testing and Identification of Plastic Materials
Time:02:00 PM TO 04:00 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.



MARKS
Q.1 (a) Give examples of (1) Soft and Weak
03
(2) Soft and Tough
(3) Hard and Tough plastic material

(b) List the electrical properties tests carried out for plastic
04
materials.

(c) Write basic preliminary tests to identify
07
(a) Polyvinyl Chloride (b) Polyamides (c)
Polystyrene


Q.2 (a) Explain in short about creep.
03

(b) Explain with diagram about notch and state the reason
04
for notching the impact test sample.

(c) Explain in detail about Tensile strength. List out the
07
various types of samples used. Write the test procedure
for same.




Q.3 (a) Give full form of (i) ASTM (ii) ISO
03

(b) Write a short note on : Vicat softening Point
04

(c) Define Surface and Volume Resistivity and explain the
07
test procedure to determine same with neat diagram.




Q.4 (a) Define-(i) Heat Deflection Temperature
03
(ii) Dielectric Constant
(iii) Refractive Index

(b) Write a short note on : Thermal Conductivity
04

(c) Describe Differential scanning Calorimeter (DSC) with
07
neat diagram and graph.



Q.5 (a) Explain in short the significance of TGA.
03

(b) Define- (i) Haze
04
(ii) Dissipation Factor
(iii) Co- efficient of thermal expansion

(c) Define Luminous Transmittance & Haze. Explain Test
07
method carried out to determine Luminous
Transmittance & Haze of plastics material with neat
sketch.



1

---

Q.6 (a) Write short note on : Gloss
03

(b) Explain Impact Strength in brief.
04

(c) Explain ESCR test in detail with neat sketch.
07



Q.7 (a) Write short notes on: Flammability test
03

(b) Explain the significance of Dielectric Strength.
04

(c) Define MFI and explain in detail about the test, along
07
with the factors affecting it.



Q.8 (a) Write short note on: Oxygen Index Test.
03
(b) Define Arc resistance. List the typical requirements of an
04
Insulator.
(c) Explain in detail about Gel Permeation Chromatography
07
test.

*************
2

---