Download AKTU B-Tech 8th Sem 2016-17 Advanced Welding Technology Question Paper

B. TECH. THEORY EXAMINATION (SEM–VIII) 2016-17

ADVANCED WELDING TECHNOLOGY

Time: 3 Hours

Max. Marks : 100

Note: Be precise in your answer. In case of numerical problem assume data wherever not provided.

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SECTION – A

1. Attempt all parts of the following questions: 10 x 2 = 20
   1. What is deformation resistance welding?
   2. Compare vacuum brazing with welding.
   3. How radial friction welding is used to join collars to shafts and tubes?
   4. What are the advantages of constricting plasma in PAW?
   5. What are the effects of gases in welding?

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   6. What are the main factors affecting the welding design?
   7. Define dilution.
   8. Name any four weld defects.
   9. What are the factors that cause slag inclusion?
   10. Give two examples of adhesives and mention its general characteristics.

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SECTION - B

2. Attempt any five of the following questions: 5 x 10 = 50
   1. What are the different joint designs in adhesive bonding? Explain how a good joint design can be selected?
   2. Explain the welding symbol with an example.
   3. Explain the process of Needle Arc Micro Plasma Welding.
   4. Describe the reasons that fatigue failure generally occur in HAZ of welds instead of through the weld bead itself.

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   5. Explain how different process parameter influence Laser Beam Welding.
   6. With suitable sketch explain the process of TIG welding. What are its disadvantages?
   7. What are the different joint designs in adhesive bonding? Explain how a good joint design can be selected?
   8. Describe Principle of operation of EBW (Electron beam welding). What are the possible problem or difficulties and how it can be dealt with? Write down the advantage and limitation.

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SECTION-C

3. Attempt any two of the following questions: 2 x 15 = 30
   1. What are the different joint designs in adhesive bonding? Explain how a good joint design can be selected?
   2. Explain how the weld quality of different welded joints can be determined?
4. Explain the following:
   1. Dye Penetrant Testing
   2. Inspection of welds.

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   3. Discontinuities in welds and their causes.
5. 1. Explain With neat labeled sketch the working of Ultra sonic Welding.
   2. what are the different types of errors in welding and what precautions affect the strength of the joint?

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