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Exams on METALLURGICAL ANALYSIS, Study notes of Metallurgical Engineering

Jamia Millia IslamiaMetallurgical Engineering

B.Tech Semester Supplimentary Examinations, June 2009 METALLURGICAL ANALYSIS (Metallurgy

Typology: Study notes

2010/2011

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Code No: R05011801 Set No. 1
I B.Tech Semester Supplimentary Examinations, June 2009
METALLURGICAL ANALYSIS
(Metallurgy & Material Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
โ‹†โ‹†โ‹†โ‹†โ‹†
1. (a) What technique can we adopt for dissolving metallurgical materials like fluxes
and slags? Explain.
(b) Compare Molarity and Molality. How are they useful in the analysis of mate-
rials? [8+8]
2. (a) Give the essential requirements for the successful application of spot tests for
the identification of radicals.
(b) How are the following detected? Give the necessary chemical reactions
i. Iron.
ii. Chromium. [6+10]
3. Discuss in detail about Zinc determination in Tin-bronzes, Gun metals and phos-
phor bronzes. [16]
4. (a) With a neat sketch explain Sulfur estimation in steels by evolution method.
(b) Describe the procedure for Mo determination by Volumetric method in steel.
[8+8]
5. (a) List the different methods for determining iron content, in Iron oxes.
(b) Discuss the principle involved in the determination of iron content in iron ores
by any one method with relevant equations. [8+8]
6. (a) Explain the need for instrumental analysis in metallurgical analysis.
(b) List the different instrumental techniques used in analysis of metallurgical
samples.
(c) State and explain Beer-Lambert law. [6+4+6]
7. (a) How is migration current eliminated?
(b) Explain the procedure involved in determination of lead with standard potas-
sium dichromate solution.
(c) Comment on amperometric titrations with the rotating platinum micro-electrode.
[4+6+6]
8. (a) What is the basic principle in flame photometry?
(b) With neat sketches, name the events that occur in rapid succession when a
solution containing a suitable compound of the metal to be investigated is
aspirated into a flame.
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I B.Tech Semester Supplimentary Examinations, June 2009 METALLURGICAL ANALYSIS (Metallurgy & Material Technology) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks โ‹† โ‹† โ‹† โ‹† โ‹†

  1. (a) What technique can we adopt for dissolving metallurgical materials like fluxes and slags? Explain. (b) Compare Molarity and Molality. How are they useful in the analysis of mate- rials? [8+8]
  2. (a) Give the essential requirements for the successful application of spot tests for the identification of radicals. (b) How are the following detected? Give the necessary chemical reactions i. Iron. ii. Chromium. [6+10]
  3. Discuss in detail about Zinc determination in Tin-bronzes, Gun metals and phos- phor bronzes. [16]
  4. (a) With a neat sketch explain Sulfur estimation in steels by evolution method. (b) Describe the procedure for Mo determination by Volumetric method in steel. [8+8]
  5. (a) List the different methods for determining iron content, in Iron oxes. (b) Discuss the principle involved in the determination of iron content in iron ores by any one method with relevant equations. [8+8]
  6. (a) Explain the need for instrumental analysis in metallurgical analysis. (b) List the different instrumental techniques used in analysis of metallurgical samples. (c) State and explain Beer-Lambert law. [6+4+6]
  7. (a) How is migration current eliminated? (b) Explain the procedure involved in determination of lead with standard potas- sium dichromate solution. (c) Comment on amperometric titrations with the rotating platinum micro-electrode. [4+6+6]
  8. (a) What is the basic principle in flame photometry? (b) With neat sketches, name the events that occur in rapid succession when a solution containing a suitable compound of the metal to be investigated is aspirated into a flame.

(c) With a simplified energy level diagram, explain elementary theory involved in flame photometry. [4+7+5]

I B.Tech Semester Supplimentary Examinations, June 2009 METALLURGICAL ANALYSIS (Metallurgy & Material Technology) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks โ‹† โ‹† โ‹† โ‹† โ‹†

  1. (a) What is volumetric analysis? How is it performed and how is it useful in analysis process? (b) How do we calculate, equivalent weight of acids, bases and salts? Explain with suitable examples? [8+8]
  2. (a) Discuss briefly how the identification of metals is carried out by dry reaction (b) How are the following detected in metallurgical materials using spot tests. Give necessary chemical equations. i. Aluminium. ii. Copper. [6+10]
  3. Explain the determination of Zinc in Brasses, Manganese bronzes and Nickel Silvers. [16]
  4. (a) Describe the Mn estimation in Steels by Gravimetric method. (b) How is Vanadium estimated in Steels containing Molybdenum. [8+8]
  5. (a) Define the term : fire assaying. Give examples of metals that are assayed by this technique. (b) List any four important assay reagents and their characteristics. (c) Which type of metallurgical products are generally assayed? [5+5+6]
  6. (a) Explain in detail any one of the colorimetric methods. (b) Explain the important basic principles of chemical analysis. (c) List the advantages of using photoelectric cells in colorimetric analysis.[5+5+6]
  7. (a) What are the advantages of using calomel electrode over hydrogen electrode? (b) With neat sketches discuss use of calomel electrodes in potentiometric titra- tion. [8+8]
  8. (a) What are the two main forms of chemical interference? Briefly explain each one of them. (b) What is an essential requirement for flame spectrometry? How is it achieved. [8+8]

I B.Tech Semester Supplimentary Examinations, June 2009 METALLURGICAL ANALYSIS (Metallurgy & Material Technology) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks โ‹† โ‹† โ‹† โ‹† โ‹†

  1. (a) Discuss the importance of analysis of materials, in metallurgical industries. (b) Explain, what are various qualitative and quantitative analysis methods? [8+8]
  2. (a) Discuss briefly how the identification of metals is carried out by dry reaction (b) How are the following detected in metallurgical materials using spot tests. Give necessary chemical equations. i. Aluminium. ii. Copper. [6+10]
  3. (a) Explain the procedure for Zn determination in Brass by Gravimetric method. (b) How is Cu estimated from the Sn-base solders. [8+8]
  4. Write a short note on the following:

(a) Cr estimation in high Cr & high Ni steels. (b) Ni determination from Cast Irons by Gravimetric method. [8+8]

  1. (a) Give the details of the methods used for the determination of gold and silver in their ores. (b) Describe the methods to determine Iron content in a sample of Haematite. [8+8]
  2. (a) What is the major basic principle of working in colorimetric method of analy- sis. Compare and contrast between human eye and photoelectric cells for the quantitative comparisons of the color in colorimetric method. (b) Describe the apparatus required for the comparison of colours in Nessler tubes. [9+7]
  3. (a) Name two different types of absorptiometers and briefly explain them with examples. (b) What are photoelectric spectrophotometers? What is the fundamental prin- ciple involved in it? (c) What is the criteria for a satisfactory colorimetric analysis? Briefly explain. [5+6+5]
  4. (a) With the help of a Wheatstone bridge circuit, explain measurement of con- ductivity.