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

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 8th Semester (Eight Semester) 2016-17 Advanced Welding Technology Question Paper

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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 Ofnumerical problem assume data wherever not provided.
SECTION ? A
1. Attempt all parts of the following questions: 10 x 2 = 20
(a) What is deformation resistance welding?
(b) Compare vacuum brazing with welding.
(c) How radial friction welding is used to join collars t0 shafts and tubes?
(d) What are the advantages of constricting plasma in PAW?
(e) What are the effects of gases in welding?
(f) What are the main factors affecting the welding design?
(g) Define dilution.
(h) N ame any four weld defects.
(i) What are the factors that cause slag inclusion?
(j) Give two examples of adhesives and mention its general characteristics
SECTION ? B
2. Attempt any five of the following questions: 5 x 10 = 50
(a) What are the different joint designs in adhesive bonding? Explain how a good joint
design can be selected?
(b) Explain the welding symbol with an example.
(c) Explain the process of Needle Arc Micro Plasma Welding.
(d) Describe the reasons that fatigue failure generally occur in HAZ of welds instead of
through the weld bead itself.
(e) Explain how different process parameter in?uence Laser Beam Welding.
(f) With suitable sketch explain the process of TIG welding. What are its disadvantages?
(g) What are the different joint designs in adhesive bonding? Explain how a good joint
design can be selected?
(h) 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.
SECTION ? C
Attempt any two of the following questions: 2 x 15 = 30
3 (i) What are the different joint designs in adhesive bonding? Explain how a good
joint design can be selected?
(ii) Explain how the weld quality of different welded joints can be determined?
4 Explain the following:
(i) Dye Penetrant Testing
(ii) Inspection of welds.
(iii) Discontinuities in welds and their causes.
5 (i) Explain With neat labeled sketch the working of Ultra sonic Welding.

(ii) What are the different methods of diffusion welding? How surface preparations
affect the strength of the joint?