Download GTU BE/B.Tech 2018 Winter 8th Sem New 2182112 Industrial Corrosion Testing Prevention And Control Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VIII (NEW) EXAMINATION — WINTER 2018

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Subject Code: 2182112 Date: 19/11/2018
Subject Name: Industrial Corrosion, Testing, Prevention & Control
Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Enlist different methods of corrosion prevention. 03
(b) Define corrosion. List the types of corrosion. 04

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(c) Discuss the importance of corrosion study based on economic 07 aspects.

Q.2 (a) What is em.f. series? Discuss its applicability in corrosion 03 studies.
(b) Multiple Choice Questions: 04
1) Which of the following is not an example of physical protection?
a. Greasing

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b. Painting
c. Galvanizing
d. Attaching the metal to the negative terminal of a battery
2) Passivity is due to
a. Higher EMF

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b. Lower EMF
c. Oxide film
d. All of the above
3) Corrosion is a chemical reaction that involves
a. The inside of the object changing from an element to a compound

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b. The surface of the object changing from an element to another element
c. The inside of the object changing from an element to another element
d. The surface of the object changing from an element to a compound
4) Which of the following metals would protect iron by electrons flowing to the iron,
a. Silver

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b. Magnesium
c. Tin
d. Copper
(c) Discuss the type of corrosion that occurs in riveted vessel. Explain 07 protection technique against it.
OR

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(c) Discuss stress corrosion cracking. 07

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Q.3 (a) Write briefly about corrosion resistant materials for different 03 industries.
(b) Explain the failures due to embrittlement in boiler tubes along 04 with the remedial measures.
(c) Describe the corrosion resistant materials that can be used in 07 power industries.

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OR
Q.3 (a) Write briefly about corrosion resistant materials for petrochemical 03 industries.
(b) Discuss corrosive environment in fertilizer industries. 04
(c) Discuss one corrosion related failure in petrochemical industries 07 and suggest remedies.

Q.4 (a) List out different corrosion that take place in ship building 03 industries.

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(b) Write briefly about corrosion resistant materials for automobile 04 industries.
(c) Discuss case study on fertilizer industries. 07
OR
Q.4 (a) Which types of corrosion frequently occur in automobile 03 industries?
(b) Explain how material selection is helpful to combat corrosion in 04 petrochemical industries.

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(c) Discuss case study on failures in ship building industries and 07 suggest remedies.

Q.5 (a) List out different types of corrosion that occur in marine 03 industries.
(b) Discuss the effect of water quality on corrosion rate in thermal 04 power plants.
(c) Explain how material selection is helpful to combat corrosion in 07 fertilizer industries.
OR

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Q.5 (a) Discuss corrosion resistant materials for marine industries. 03
(b) Explain sacrificial anode method: 04
(c) Identify corrosion related failures in a gas engine and suggest 07 remedies.

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