Download GTU BE/B.Tech 2019 Summer 5th Sem New 2152604 Rheology Of Rubber Question Paper

FirstRanker.com
Subject Code: 2152604
GUJARAT TECHNOLOGICAL UNIVERSITY

--- Content provided by​ FirstRanker.com ---

BE - SEMESTER-V (NEW) EXAMINATION - SUMMER 2019
Subject Name: Rheology of Rubber
Time: 02:30 PM TO 05:00 PM
Date: 31/05/2019
Total Marks: 70

--- Content provided by‌ FirstRanker.com ---

Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

--- Content provided by FirstRanker.com ---

Q.1 (a) Write the equation for Reiner-Philipoff model. (MARKS 03)
(b) Give the difference between viscoelastic and viscoplastic fluids. (MARKS 04)
(c) Explain in detail about Bingham plastic and Ellis model. (MARKS 07)

Q.2 (a) Define the term: (i) Melt flow Index (ii)Viscoelasticity (iii) Laminar flow (MARKS 03)

--- Content provided by​ FirstRanker.com ---

(b) Write a brief note on Turbulent flow. (MARKS 04)
(c) Derive the momentum flux distribution equation for flow through Falling film. (MARKS 07)
OR
(c) Derive the velocity profile equation for flow through a circular tube. (MARKS 07)

--- Content provided by‌ FirstRanker.com ---

Q.3 (a) Write the importance of Reynolds number in Fluid flow. (MARKS 03)
(b) Give the difference between the Dilatant and pseudo plastic fluid. (MARKS 04)
(c) Short note on “Turbulence damping”. (MARKS 07)
OR
Q.3 (a) Write the equation for the shell momentum balance. (MARKS 03)

--- Content provided by⁠ FirstRanker.com ---

(b) State the assumptions implied in the development of Hagen poiseuille law. (MARKS 04)
(c) Explain the velocity profile for Newtonian and non-Newtonian fluid. (MARKS 07)

Q.4 (a) Give the limitations of plunger viscometer. (MARKS 03)
(b) Write a brief note on falling sphere viscometer. (MARKS 04)

--- Content provided by‌ FirstRanker.com ---

(c) Explain in detail about the cup-and bob viscometer. (MARKS 07)
OR
Q.4 (a) Give the importance of compression rheometer. (MARKS 03)
(b) Write a brief note on plunger viscometer. (MARKS 04)
(c) Derive the equation for capillary viscometer. (MARKS 07)

--- Content provided by FirstRanker.com ---

Q.5 (a) List out the variable influencing the Rheology of rubber. (MARKS 03)
(b) Write in brief about the effect of temperature on viscosity. (MARKS 04)
(c) Explain the “Molecular Motion” in detail. (MARKS 07)
OR

--- Content provided by​ FirstRanker.com ---

Q.5 (a) Give the effect of molecular weight and molecular structure on viscosity (MARKS 03)
(b) Write the equation for zero shear viscosity. (MARKS 04)
(c) Short note on “ Entanglement of Molecules” (MARKS 07)