Firstranker's choice
Seat No.: Enrolment No.
--- Content provided by FirstRanker.com ---
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VI (New) EXAMINATION - WINTER 2019
Subject Code: 2162604 Date: 11/12/2019
Subject Name: Characterisation of Rubber
Time: 02:30 PM TO 05:00 PM Total Marks: 70
--- Content provided by FirstRanker.com ---
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q.1 (a) Why is it necessary to store the rubber product at standard conditions? Which ISO standard is used for the same? [03]
--- Content provided by FirstRanker.com ---
Q.1 (b) Give the different circumstances in which standard test method is used. Also mention the classification of sources of standards. [04]
Q.1 (c) With suitable diagrams, explain the various methods used to prepare test specimen from rubber. [07]
Q.2 (a) Write down the spot test to characterize the following rubbers: (1) SBR (2) NBR [03]
Q.2 (b) Write down the procedure for free sulphur determination test. [04]
Q.2 (c) Explain the Bragg’s law. Give advantages and disadvantages of Scanning Electron Microscopy (SEM). [07]
--- Content provided by FirstRanker.com ---
OR
Q.2 (c) Explain the operation of Transmission Electron Microscopy (TEM) with diagram showing it’s major components. [07]
Q.3 (a) Define the given terms with respect to thermal analysis of rubber: (i)Peak (ii) Base Line (iii)Heating Rate [03]
Q.3 (b) Differentiate the Differential Scanning Calorimetry(DSC) and Differential Thermal Analysis(DTA). [04]
Q.3 (c) With Suitable examples of rubber and rubber related materials, write about the applications of Thermogravimetric Analysis (TGA). [07]
--- Content provided by FirstRanker.com ---
OR
Q.3 (a) Define the given terms with respect to thermal analysis of rubber: (i)Peak Width (ii)Peak Height(iii)Peak Area [03]
Q.3 (b) Write a short note on ‘Thermobalance’. [04]
Q.3 (c) Discuss different types of transitions observed in Dynamic Mechanical Analysis by taking an example of EPDM rubber. [07]
Q.4 (a) With schematic diagram, explain the term Ry value. [03]
--- Content provided by FirstRanker.com ---
Q.4 (b) Explain the given features with respect to Chromatography:(i) Retention Time (ii) Retention Volume [04]
Q.4 (c) Discuss in detail about the classification of Gas Chromatography (GC). [07]
OR
Q.4 (a) Which different types of columns are used in Gas Chromatography(GC)? [03]
Q.4 (b) Explain the given features with respect to Chromatography: (i)Relative Retention (ii) Resolution [04]
--- Content provided by FirstRanker.com ---
Q.4 (c) Discuss in detail about the High Performance Liquid Chromatography (HPLC). [07]
Firstranker's choice
Q.5 (a) Write a brief note on ‘finger print region’. [03]
Q.5 (b) What do you mean by interferometer? Give advantages of Fourier Transform Infrared Spectroscopy (FTIR) over Infrared Spectroscopy. [04]
--- Content provided by FirstRanker.com ---
Q.5 (c) Discuss in detail about Beer-Lambert’s law. Also give its application. [07]
OR
Q.5 (a) Give classification of Infrared (IR) band. [03]
Q.5 (b) Discuss in detail about Nuclear Magnetic Resonance Spectroscopy(NMR). [04]
Q.5 (c) Discuss the different types of transitions observed during ultraviolet spectroscopy. [07]
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
--- Content provided by FirstRanker.com ---