Download GTU BE/B.Tech 2019 Summer 3rd Sem New 2132601 Basic Rubber Science Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 3rd Sem New 2132601 Basic Rubber Science Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?III (NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2132601 Date: 07/06/2019

Subject Name:Basic Rubber Science

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

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
(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
(c) Explain in detail about refractive index of polymers. 07
OR
Q.3 (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
(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
Q.4 (a) What do you mean by thermal conductivity? Write its unit. 03
(b) Write about the terms: absorptivity, reflectivity and transmissivity. 04
(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

Q.5 (a) Write about the brownian movement exhibited by colloidal solution. 03
(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

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