GTU BE 2019 Summer Question Papers || Gujarat Technological University
Subject Code: 2132601
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-III (NEW) EXAMINATION — SUMMER 2019
Subject Name: Basic Rubber Science
Time: 02:30 PM TO 05:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.1 | (a) Write about Archimedes Principle. 03 (b) How can you obtain relative density of a substance which floats in water? 04 (c) Discuss in detail about “Young’s modulus’ and ‘Shear Modulus’. 07 |
| Q.2 | (a) Write about the R class and Q class of rubbers with example. 03 --- Content provided by FirstRanker.com --- (b) Give the general rules for polymer solubility. 04(c) Explain in detail about the characteristics properties of rubber. 07 OR (c) Write a short note on ‘Suspension polymerization technique’. 07 |
| Q.3 | (a) Define the terms: (i) Reflection (ii) Refraction (iii) Critical angle 03 (b) Differentiate ‘vibrations’ and ‘waves’. 04 --- Content provided by FirstRanker.com --- (c) Explain in detail about refractive index of polymers. 07OR (a) Mention the purpose of using pigment in rubber industries. Classify the types of it. 03 (b) Discuss about the effect of fillers and processing oils on transmissibility. 04 (c) Explain in detail about electromagnetic radiation and its properties. 07 |
| Q.4 | (a) State the Fourier’s law of heat conduction. And represent it mathematically. 03 --- Content provided by FirstRanker.com --- (b) Write about the different modes of heat transfer. 04(c) Explain in detail about mass and molar concentrations with ideal gas mixture theory. 07 OR (a) What do you mean by thermal conductivity? Write its unit. 03 (b) Write about the terms: absorptivity, reflectivity and transmissivity. 04 --- Content provided by FirstRanker.com --- (c) Explain in detail about the Fick’s law of diffusion. 07 |
| Q.5 | (a) Write about multimolecular colloids and macromolecular colloids. 03 (b) Give any four applications of colloids. 04 (c) Explain the dialysis method for purification of colloidal solution in detail. 07 OR (a) Write about the brownian movement exhibited by colloidal solution. 03 --- Content provided by FirstRanker.com --- (b) What do you mean by Gel? Give importance of it. 04(c) Discuss in detail about the comparison of lyophilic sols and lyophobic sols. 07 |
Total Marks: 70
Date: 07/06/2019
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