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Posted By: Sriram Member Level: Diamond Posted Date: 16 Jun 2008
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2006 Andhra Pradesh State Jawaharlal Nehru Technological University B.Tech EXPERIMENTAL TECHNIQUES IN METALLOGRAPHY Set No. 2 Question paper
Code No: RR411811 Set No. 2
IV B.Tech I Semester Regular Examinations, November 2006
EXPERIMENTAL TECHNIQUES IN METALLOGRAPHY
(Metallurgy & Material Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. Describe Paraffin and Lead grinding laps in detail. [16]
2. (a) How does the disturbed metal form during polishing operation.
(b) How the disturbed metal is removed?
(c) What is the effect of etchant on grain boundaries? [4+4+8]
3. (a) What is meant by polarized light? Explain in detail.
(b) How the light can be polarized? Explain? [8+8]
4. Explain in detail optical microscope objectives and eyepieces. [16]
5. What are different components of an optical microscope? Describe them in detail.
[16]
6. (a) How good resolution is achieved in the electron microscope. What are the
factors that influence the resolution in electron microscopy? Explain.
(b) Explain depth of field and its role in electron microscopy in detail. [9+7]
7. (a) How does the image form in the electron microscope? Explain.
(b) How the contrast is achieved in the electron microscope? Explain. [8+8]
8. (a) Derive an expression for the transmitted intensity from perfect crystal.
(b) Describe in detail special transmission techniques. [8+8]
1 of 1
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