Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 7th Sem New 2172107 Surface Coating Technology Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2172107 Date: 19/11/2018
Subject Name: Surface 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.
MARKS
Q.1 (a) State the requirement of coating by giving suitable example of
applications.
03
(b) List the various properties developed on the surface due to surface
coatings along with name of coating.
04
(c) Critically compare Mechanical, Chemical & Electro chemical
methods of surface preparations.
of surface preparation.
07
Q.2 (a) What are the different types of Phosphating process ? state their
application with suitable example
03
(b) State the role of oxide film in Aluminium anodizing and List the
Process parameters of Anodizing Process.
04
(c) Explain Principle of electrolytic plating process and compare it with
Electro less plating. Enlist components subjected to these type of
plating with examples.
07
OR
(c) Write the operation, mechanism, advantages and disadvantages of Hot
dipping process
07
Q.3 (a) Define Pickling. State Purpose of Pickling & give name of Pickling
Chemicals
03
(b) Write short note on Electro less nickel plating. 04
(c) Explain various factors affecting Electrodeposition 07
OR
Q.3 (a) Define Sputtering? Draw Schematic only. 03
(b) Compare Physical Vapour deposition & Chemical Vapour
deposition.
04
(c) Explain chemical vapour deposition process with mechanism,
advantages. Disadvantages and applications
07
Q.4 (a) What is thermal spray coating. How it can be achieved? 03
(b) How Stainless Steels can be protected? Which Surface treatment do
you suggest for it?
04
(c) Discuss plasma spray coating technique with its advantages over
othertechniques
07
OR
Q.4 (a) Suggest type of surface treatment needed for removing Tarnishing
on Silver ornaments.
03
(b) Compare Liquid Carburizing & Gas Carburizing in terms of media
used, quality and productivity of the process.
04
(c) What is plasma Nitriding ? What are its advantages over other
Nitriding Processes. How it can be achieved ?
07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2172107 Date: 19/11/2018
Subject Name: Surface 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.
MARKS
Q.1 (a) State the requirement of coating by giving suitable example of
applications.
03
(b) List the various properties developed on the surface due to surface
coatings along with name of coating.
04
(c) Critically compare Mechanical, Chemical & Electro chemical
methods of surface preparations.
of surface preparation.
07
Q.2 (a) What are the different types of Phosphating process ? state their
application with suitable example
03
(b) State the role of oxide film in Aluminium anodizing and List the
Process parameters of Anodizing Process.
04
(c) Explain Principle of electrolytic plating process and compare it with
Electro less plating. Enlist components subjected to these type of
plating with examples.
07
OR
(c) Write the operation, mechanism, advantages and disadvantages of Hot
dipping process
07
Q.3 (a) Define Pickling. State Purpose of Pickling & give name of Pickling
Chemicals
03
(b) Write short note on Electro less nickel plating. 04
(c) Explain various factors affecting Electrodeposition 07
OR
Q.3 (a) Define Sputtering? Draw Schematic only. 03
(b) Compare Physical Vapour deposition & Chemical Vapour
deposition.
04
(c) Explain chemical vapour deposition process with mechanism,
advantages. Disadvantages and applications
07
Q.4 (a) What is thermal spray coating. How it can be achieved? 03
(b) How Stainless Steels can be protected? Which Surface treatment do
you suggest for it?
04
(c) Discuss plasma spray coating technique with its advantages over
othertechniques
07
OR
Q.4 (a) Suggest type of surface treatment needed for removing Tarnishing
on Silver ornaments.
03
(b) Compare Liquid Carburizing & Gas Carburizing in terms of media
used, quality and productivity of the process.
04
(c) What is plasma Nitriding ? What are its advantages over other
Nitriding Processes. How it can be achieved ?
07
2
Q.5 (a) List different quality tests of Electroplated article.
03
(b) Discuss & draw the defects found in Electroplated objects and state
the causes of it.
04
(c) Describe Electroplating of Copper. Explain factors affecting
Electrodeposition
07
OR
Q.5 (a) What is Passivation? Why it is required for Stainless Steels ? 03
(b) What is surface modification by Ion beam implantation? Discuss with
example.
04
(c) State the type of Surface Engineering on the following engineering
components 1. Kitchen utensils 2. Car body 2. Engine
Valves 3. Decorative Ash tray 4.Plumbing pipes 5. Water taps 6.
Car wheel rim 7. Bicycle body
07
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This post was last modified on 20 February 2020