GTU B.Tech 2020 Winter Question Papers || Gujarat Technological University
Subject Name:Testing and Identification of Plastic Materials
Time:02:00 PM TO 04:00 PM Total Marks: 56
3. Figures to the right indicate full marks.
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-VI (NEW) EXAMINATION - WINTER 2020
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Subject Code:2162307 Date:22/01/2021Subject 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.
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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 (2) Soft and Tough (3) Hard and Tough plastic material | 03 |
| (b) List the electrical properties tests carried out for plastic materials. | 04 |
| (c) Write basic preliminary tests to identify --- Content provided by FirstRanker.com --- (a) Polyvinyl Chloride (b) Polyamides (c) Polystyrene | 07 |
| Q.2 (a) Explain in short about creep. | 03 |
| (b) Explain with diagram about notch and state the reason for notching the impact test sample. | 04 |
| (c) Explain in detail about Tensile strength: List out the various types of samples used. Write the test procedure for same. | 07 |
| 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 test procedure to determine same with neat diagram. | 07 |
| Q.4 (a) Define-(i) Heat Deflection Temperature (ii) Dielectric Constant (iii) Refractive Index | 03 |
| (b) Write a short note on : Thermal Conductivity | 04 |
| (c) Describe Differential scanning Calorimeter (DSC) with neat diagram and graph. | 07 |
| Q.5 (a) Explain in short the significance of TGA. | 03 |
| (b) Define- (1) Haze (2) Dissipation Factor (3) Co- efficient of thermal expansion | 04 |
| (c) Define Luminous Transmittance & Haze. Explain Test method carried out to determine Luminous Transmittance & Haze of plastics material with neat sketch. | 07 |
| 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 with the factors affecting it. | 07 |
| Q.8 (a) Write short note on: Oxygen Index Test. | 03 |
| (b) Define Arc resistance. List the typical requirements of an Insulator. | 04 |
| (c) Explain in detail about Gel Permeation Chromatography test. | 07 |
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