My Profile
Active Members
TodayLast 7 Days
more...
Awards & Gifts
Online Exams
Fresher Jobs
Our fresher job section is exclusively for fresh graduates! Find jobs for freshers in major Indian
cities including Bangalore, Chennai, Hyderabad, Pune or Kochi
Resources
Find educational articles, blogs, discussion threads and other resources.
Colleges
Find details about any college in India or search for courses.
|
Download Model question papers & previous years question papers
|
Posted Date: 01 May 2008 Posted By: Nitin Member Level: Platinum
|
2007 Jawaharlal Nehru Technological University B.Tech ELECTRO METALLURGY AND CORROSION (Metallurgy & Material Technology) - Set 1 Question paper
IV B.Tech I Semester Regular Examinations, November 2007 ELECTRO METALLURGY AND CORROSION (Metallurgy & Material Technology) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
1. (a) Explain the following terms i. Current e?ciency ii. Energy e?ciency. (b) Suppose that a certain current passes for a given time through three baths connected in series i. An acid copper bath used as a coulometer and assumed to have an e?ciency of 100%. ii. A Nickel bath and iii. A Zinc bath. The respective weights of the 3 metals deposited were 35.6 gm of copper, 29.2 gm of Ni & 34.8 gm of Zinc. What are the cathode e?ciencies of Ni & Zn deposition (Hint: 1 amp Hr deposits 1.86 g of Cu, 1.095 gm of Ni & 1.22 g of Zinc). [6+10]
2. (a) Name the measuring instruments in Electrochemistry and explain them brie?y. (b) What is standard Potential? How is EMF measured? Discuss the usefulness of EMF series. [8+8]
3. (a) What is primary current distribution ? Discuss its importance in electroplating. (b) Discuss the e?ect of polarization on elctrodeposition. (c) What is throwing power? Discuss in detail. [6+5+5]
4. Describe in detail the procedure you will adopt to plate chromium on a steel plate. How would you test the thickness, Strength and porosity of electroplated chromium? [16]
5. (a) Explain the importance of over voltage on Environment of the corrosion rate. (b) De?ne passivity and explain how the e?ect of temperature and acid concentration on anodic dissolution behavior of an active , passive metal. [7+9]
6. (a) A widely used measure of corrosion is the weight loss per unit area per unit time. Contrast the usefulness of this measure when applied to uniform. Corrosion and when applied to pitting. (b) Di?erentiate between galvanic corrosion and stress corrosion cracking. Give some examples and remedies. [8+8]
7. (a) Cracks in cathodic protection are very dangerous. Explain. (b) Primers are commonly used before paint coats are given. Why?
8. (a) Explain factors involved in pitting corrosion. (b) Explain electrochemical theory of corrosion
Return to question paper search
|
|
|
Submit Previous Years University Question Papers and make money from adsense revenue sharing program
Are you preparing for a university examination? Download model question papers
and practise before you write the exam.
|
Advertise Here
|