III B.Tech I Semester Supplementary Examinations, November 2006 TECHNIQUES OF METAL JOINING (Metallurgy & Material Technology) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Give a brief history of the development of welding practice and welding industry.
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(b) Differentiate between plastic welding and fusion welding with examples. [10+6] 2. Explain the design of welds, subjected to the following types of combined stresses. (a) Torsion and direct stress (b) Shear and bending stresses
[6+5+5]
or
(c) Shear and Torsion stresses.
3. (a) What factors are to be considered and why in the selection of
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i. Welding current ii. Welding electrode. In Dc arc welding process?
(b) Explain how you can compute standard welding time and welding costs in Arc welding processes. [4+4+8] 4. (a) What is Nugget? How is the size of the resistance spot weld determined? Explain. (b) Compare spot welding with upset welding.
[8+8]
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5. (a) What is weldability? Explain how and on what basis weldability can be assessed. (b) Discuss in detail the welding of stainless steels and other high alloyed steels. [8+8]
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6. (a) Why is it difficult to weld copper alloys? Suggest suitable remedies and precautions to weld the same. (b) Discuss the difficulties that are encountered during the welding of dissimilar alloys and how to overcome them. [9+7]
7. Develop the equations for the tensile load that can be applied on (a) Single V groove butt joint (b) Lap joint with transverse fillet weld.
[8+8]
8. (a) Compare Brazing and Braze welding. What are their specific applications? Explain. 1 of 2
NR
Code No: NR311805
(b) Explain with the help of a neat sketch the furnace brazing process. Explain its applications, advantages and limitations. [8+8]
NR311805 III B.Tech I Semester Supplementary Examinations ...
TECHNIQUES OF METAL JOINING · (Metallurgy & Material Technology) · Time: 3 hours · Max Marks: 80 · Answer any FIVE Questions · All Questions carry equal ...
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III B.Tech I Semester Supplementary Examinations, November 2005. POWER ELECTRONICS · (Electrical & Electronic Engineering) · Time: 3 hours · Max Marks: 80 · Answer any FIVE Questions · All Questions carry equal marks · ***** · 1. (a) Explain the oper
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