GTU BE 2019 Summer Question Papers || Gujarat Technological University
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VI(NEW) — EXAMINATION - SUMMER 2019
--- Content provided by FirstRanker.com ---
Subject Code: 2162604 Date: 18/05/2019
Subject Name: Characterisation of Rubber
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
--- Content provided by FirstRanker.com ---
| Q.1 | (a) List out the chemicals which are used in determination of free sulphur present in vulcanizate. | 03 |
| (b) Write about the different test specimen preparation methods. | 04 | |
| (c) Discuss in detail about the classification of standards. | 07 | |
| Q.2 | (a) Which characteristic information related to rubber is obtained by Wide Angle X-ray Scattering? | 03 |
| (b) Write about main difficulties in exploitation of Transmission Electron Microscopy. | 04 | |
| (c) Explain the given features with respect to Electron Microscopy: (i) Secondary Electrons (ii) Back Scattered Electrons | 07 | |
| OR | ||
| Q.2 | (a) Discuss in detail about the relaxation behavior of excited atoms with respect to Scanning Electron Microscopy (SEM). | 03 |
| (b) Define the given terms: (i) Endothermic Peak (ii) Exothermic Peak (iii) Peak Width | 04 | |
| (c) Write down the characteristics of good thermobalance design. | 07 | |
| Q.3 | (a) Discuss in detail about the different transitions which are observed in standard Dynamic Mechanical Analysis (DMA) curve of rubber. | 03 |
| (b) OR | 04 | |
| (c) Define the given terms: (i) Peak Height (ii) Peak Area (iii) extrapolated Onset | 07 | |
| Q.3 | (a) Which different types of probe geometries are used in Thermomechanical Analysis (TMA) of rubber? | 03 |
| (b) Differential Thermal Analysis is the best tool to propose a mechanism of crosslinking - Justify this statement with suitable example of rubber. | 04 | |
| (c) Write about types of columns used in Gas Chromatography. | 07 | |
| Q.4 | (a) List the types of detectors used in High Performance Liquid Chromatography. Write on any one. | 03 |
| (b) Discuss in detail about the principle and separation mechanism of Gel Permeation Chromatography (GPC) | 04 | |
| (c) OR | 07 | |
| Q.4 | (a) Which sample injection systems are used in Gas Chromatography? | 03 |
| (b) Write in brief on instrumentation of High Performance Liquid Chromatography (HPLC). | 04 | |
| (c) Discuss in detail about the preparatory and operational steps of Thin Layer Chromatography (TLC). | 07 | |
| Q.5 | (a) Which information related to rubber is obtained by Infrared Spectroscopy? | 03 |
| (b) Write a note on ‘fingerprint region’. | 04 | |
| (c) Write a short note on single beam UV-Spectrophotometer. | 07 | |
| Q.5 | (a) Discuss applications of Fourier Transform Infrared Spectroscopy with suitable case study of rubber and related material. | 03 |
| (b) Write a short note on double beam UV-Spectrophotometer. | 04 | |
| (c) Discuss in detail about Beer-Lambert’s law. | 07 | |
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University