R05011801-metallurgical-analysis

Set No. 1

Code No: R05011801

I B.Tech Supplimentary Examinations, Aug/Sep 2008 METALLURGICAL ANALYSIS (Metallurgy & Material Technology) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. Discuss various techniques for the preparation for solutions for different metallurgical materials. [16] 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 Nickel in Nickel-Silvers, Cupro-Nickels and high tensile brasses. [16] 4. (a) Discuss the various methods for the estimation of Cr in alloy steels. (b) How is Phosphorous in Iron determined by Volumetric method.

[8+8]

5. Describe the procedure for the determination of the following in the manganese ores. (a) Determination of Lime. (b) Determination of Sulphur. (c) Determination of Phosphorus.

[5+5+6]

6. (a) Define the term Colorimetry? How is the colour developed in the solution in Colorimetry studies. (b) Name the different techniques of Colorimetry. Give their advantages and disadvantages. [8+8] 7. (a) Explain the procedure involved in colour measurement by standard series method. (b) Discuss colorimetric titration using duplication method.

[8+8]

8. (a) With the help of a Wheatstone bridge circuit, explain measurement of conductivity. (b) Discuss the basis of conductometric titrations. ⋆⋆⋆⋆⋆

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[10+6]

Set No. 2

Code No: R05011801

I B.Tech Supplimentary Examinations, Aug/Sep 2008 METALLURGICAL ANALYSIS (Metallurgy & Material Technology) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. Explain the following with sutiable examples and equations. (a) (b) (c) (d)

[16]

Molarity Normality Molality Equivalent weight.

2. (a) Mention the factors that should be taken into consideration in choosing an analytical method. (b) Give the advantages and disadvantages of classical methods of analysis.[8+8] 3. Explain the determination of Nickel in Nickel-Silvers, Cupro-Nickels and high tensile brasses. [16] 4. (a) How is Silicon estimated by perchloric acid method. (b) How do you determine Sulfur in Iron & Steel by gravimetric method? [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. [4+12] 6. (a) What is the basic principle on which the colorimetric analysis works. Compare the advantages and limitations of colorimetric analysis with other methods of instrumental analysis. (b) In case of colorimetric analysis the final analysis involves judgment by human eye. Where does really judgment by human eye involve. Is it going to lead for major errors in final analysis? How the error may be prevented or reduced. Give your suggestions for better results in this technique. [8+8] 7. (a) What is the fundamental principle of amperometric titration? (b) With neat sketches, explain the technique of amperometric titrations with the dropping mercury electrode. (c) What is the use of concentrated reagents? [5+6+5] 8. (a) Discuss the general considerations in quantitative technique of polarography. (b) Name three methods used for evaluation of quantitative results and briefly explain each one of them. [8+8] ⋆⋆⋆⋆⋆ 1 of 1

Set No. 3

Code No: R05011801

I B.Tech Supplimentary Examinations, Aug/Sep 2008 METALLURGICAL ANALYSIS (Metallurgy & Material Technology) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) What are primary and secondary standard substances? Explain the method of preparation of a standard solution, at least with one example? (b) Explain how do you prepare 500 ml of 0.1M NaC2 O4 solution?

[12+4]

2. (a) What is a borax bead test? How is it carried out? Give the applications of this test for qualitative analysis. (b) Mention the spot test analysis for the following i. Al ii. Ni iii. Mo.

[7+9]

3. How is Copper determined in Brasses, Aluminium Broznes and Nickel Silvers? [5+6+5] 4. Write notes on the following: (a) Estimation of Ni in High Cr & High Ni steels by Gravimetric method. (b) Estimation of Cr in Iron & Steels containing less than 2 % Cr.

[8+8]

5. Explain the procedure in detail for the determination of total iron in iron ore by potassium permanganate method. Give the various important chemical reactions and the precautions to be considered. [16] 6. What do you mean by instrumental analysis. What are the various types of instrumental analysis used in metallurgical analysis? Explain their principles of operation in detail. [16] 7. Give an account on the following: (a) Potentiometric titrations using classical method. (b) Differential potentiometric titrations.

[8+8]

8. (a) What are the advantages of dropping mercury electrode? (b) What are the factors affecting the limiting current with a dropping mercury cathode? Briefly discuss each one of them. [7+9] ⋆⋆⋆⋆⋆

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Set No. 4

Code No: R05011801

I B.Tech Supplimentary Examinations, Aug/Sep 2008 METALLURGICAL ANALYSIS (Metallurgy & Material Technology) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Explain the advantages and disadvantages of instrumental methods of analysis. (b) What is metallurgical analysis? Explain its scope.

[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. Write the procedure for finding the Phosphorous content in Phosphor bronzes and Gun metals. [16] 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]

5. How are the furnaces for assaying process are broadly divided. Explain their working principle with the help of suitable figures. [16] 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) Discuss determination of the absorption curve and concentration of a substance (potassium nitrate) method. (b) What is the chief advantage of colorimetric and spectrophotometric methods? [9+7] 8. Write short notes on: (a) Electro - Analysis. (b) Conductometry.

[8+8] ⋆⋆⋆⋆⋆

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