GTU BE 6th Semester 2163901 Coating technology Summer 2018 Question Paper

Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE – SEMESTER ?VI (NEW) – EXAMINATION ? SUMMER 2018
Subject Code: 2163901 Date: 28/04/2018
Subject Name: Coating technology
Time: 10:30 AM to 01:00 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 the importance of metal coating and polymer. 03
(b) Give the merits and demerits of spray and dip coating. 04
(c) Write short note on Surface engineering.
07

Q.2 (a) How wear occur? 03
(b) How can we measure the thickness of coating? Explain
any one technique in short.
04
(c) Explain the term Rheology and write it?s important in
coating technology.
07
OR
(c) Explain the SEM. 07
Q.3 (a) Write advantage of antifriction coating. 03
(b) Give the difference between alloying and cladding. 04
(c) Explain the wetting with surface energy equation and neat
diagram.
07
OR
Q.3 (a) Give the advantage and disadvantage of electroplating. 03
(b) Write the faraday?s law of Electrolysis. 04
(c) Write short note on electroplating With neat diagram. 07
Q.4 (a) Write the advantage of PTFE coating. 03
(b) Define metal coating and non-metallic coating. 04
(c) Write the full form of EPD and explain with neat diagram. 07
OR
Q.4 (a) Write the importance of Ion-implation in electronic
industries.
03
(b) Explain any one technique for metallic coating with
example.
04
(c) Write the two suitable SOL-GEL coating techniques. 07
Q.5 (a) Give the difference between Electroplating and EPD. 03
(b) Write short note on Newtonian Fluid and Non Newtonian
Fluid.
04
(c) Explain laser Cladding with neat diagram. 07
OR
Q.5 (a) Give the advantage and disadvantage of Ion beam
implation.
03
(b) Why Electroplating is important in metal coating. (Write
four point in brief).
04
(c) Explain the electron beam hardening. 07
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