Rr11801-metallurgical-analysis

Set No. 1

Code No: RR11801

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 is the difference between the gross sample and the laboratory sample with reference to solids? (b) Describe various methods of reduction of bulk sample.

[8+8]

2. (a) Write a brief note on ‘theory of acid-base indicators’.

[4]

(b) Explain how the following reagents are useful in the qualitative analysis of metal ions. i. 1-nitro-2-naphthol. ii. dimethyl glyoxime. iii. Chramotrophic Acid.

[4 × 3]

3. Explain the determination of Zinc in Brasses, Manganese bronzes and Nickel Silvers. [16] 4. (a) Describe the volumetric method of analysis for Nickel in Iron and Steel. (b) How is Chrome estimated in Iron and Steel by calorimetric method.

[8+8]

5. Explain the following: (a) Manufacture of cupels (b) Process of cupellation (c) Parting.

[5+6+5]

6. Write short notes on (a) standards used in colorimetry and (b) duplication method of colorimetry.

[8+8]

7. (a) With neat sketches, discuss photoemissive cells and Barrier-layer cells. (b) What are the advantages of Spekker absorptiometers? (c) What are the essential parts of a one-cell filter absorptiometer?

[6+5+5]

8. Write short notes on: (a) Electro - Analysis. (b) Conductometry.

[8+8] ⋆⋆⋆⋆⋆ 1 of 1

Set No. 2

Code No: RR11801

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 is the difference between the gross sample and the laboratory sample with reference to solids? (b) Describe various methods of reduction of bulk sample.

[8+8]

2. (a) What is a borax bead test? How is it carried out? Give the applications of this test for qualitative analysis. [7] (b) Mention the spot test analysis for the following i. Al ii. Ni iii. Mo.

[3 × 3]

3. (a) Describe the procedure for Pb determination in Sn base alloys. (b) How is Sn estimated in Cu Alloys by volumetric method.

[8+8]

4. (a) How is Mn estimated by persulfate method in i. Cr -Steels. ii. Chromium-Tungsten steels. (b) Describe procedure for Cr estimation in high carbon, ferro-chrome steels.[8+8] 5. Explain with simple sketches the different types of furnaces used in fire assaying. [16] 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 titration. [8+8] 8. (a) With neat curves, discuss measurement of polarographic wave heights. (b) Write short notes on manual non-recording polarography. ⋆⋆⋆⋆⋆

1 of 1

[8+8]

Set No. 3

Code No: RR11801

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 is the difference between the gross sample and the laboratory sample with reference to solids? (b) Describe various methods of reduction of bulk sample.

[8+8]

2. (a) Write a brief note on ‘theory of acid-base indicators’.

[4]

(b) Explain how the following reagents are useful in the qualitative analysis of metal ions. i. 1-nitro-2-naphthol. ii. dimethyl glyoxime. iii. Chramotrophic Acid.

[4 × 3]

3. (a) Explain the determination of carbon in iron steel by strholein apparatus. (b) Describe the Sodium bismuthate method to find out the manganese content in. Iron and Steels. [8+8] 4. (a) Explain the principle of Jones reductor methods for the estimation of Mo in Steels. (b) How is the graphitic carbon estimated in cast Irons?

[8+8]

5. (a) What is cupellation? What are its advantages and disadvantages? (b) Explain the cupellation processes used for silver and gold assaying.

[6+10]

6. Explain any three of the following: (a) Limitations of Instrumental analysis. (b) Spectro photometry. (c) PULFRICH photometer.

[5+5+6]

7. (a) Write short notes on colorimetric titrations with duplication method. (b) Differentiate between a colorimeter and photo-electric colorimeter?

[8+8]

8. (a) What is polarograph & Explain with the help of a circuit diagram. (b) Briefly describe how a polarogram is obtained by a manual polarograph.[8+8] ⋆⋆⋆⋆⋆

1 of 1

Set No. 4

Code No: RR11801

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) Discuss the following with reference to reduction of bulk samples

[5+5]

i. Tabling. ii. Mechanical dividers. (b) Write briefly on the significance of sampling in the analysis of raw materials. [6] 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. Explain the determination of Zinc in Brasses, Manganese bronzes and Nickel Silvers. [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. Write short notes on (a) determination of maganese content in manganese ores. (b) furnaces used for cupellation. (c) parting of silver and gold from lead.

[5+5+6]

6. Write short notes on (a) standards used in colorimetry and (b) duplication method of colorimetry.

[8+8]

7. (a) With neat sketches, discuss photoemissive cells and Barrier-layer cells. (b) What are the advantages of Spekker absorptiometers? (c) What are the essential parts of a one-cell filter absorptiometer? 8. Write short notes on the following: (a) Decomposition potential. 1 of 2

[6+5+5]

Set No. 4

Code No: RR11801 (b) Overpotential. (c) Character of the deposit.

[6+5+5] ⋆⋆⋆⋆⋆

2 of 2