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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VIII(NEW) EXAMINATION - SUMMER 2019
Subject Code:2181927 Date:13/05/2019
Subject Name:Advance Welding Technology
Time:10:30 AM TO 01:00 PM Total Marks: 70
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Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q:1 (a) Enlist different variables which affect the quality of Resistance Welding. 03
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(b) What is API standard & ASTM standard? 04(c) Explain factors affecting changes in microstructure and mechanical properties of HAZ of steel. 07
Q:2 (a) Explain different types of Welding Positions. 03
(b) Discuss effects of Welding parameters on Weld structure. 04
(c) Discuss with neat sketch shielded metal arc welding process; state the advantages, limitations and applications. 07
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OR
(c) Discuss about various types of flames commonly used in gas welding process with specific application of each types. 07
Q:3 (a) Write down different steps involved in Soldering process. 03
(b) Write down difference between Destructive and Non Destructive testing. 04
(c) Distinguish between welding, brazing and soldering process. 07
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OR
Q:3 (a) Write down difference between Friction Welding & Inertia Welding. 03
(b) Explain Stud welding process with advantages and limitations. 04
(c) Explain working principle of eddy current testing method, list out various coils used in this methods with neat sketch. 07
Q:4 (a) Give detail classification of welding processes. 03
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(b) Draw Fe-C & CC-T diagram. 04(c) Why leak testing is required? Explain procedure of leak testing method with neat sketch. 07
OR
Q:4 (a) Explain design Guide lines for sound welding joint. 03
(b) Explain TIG welding with neat sketch. 04
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(c) Explain ASME Code for Boiler and Pressure Vessel. 07Q:5 (a) Discuss the Factors affecting the selection of welding joint. 03
(b) Explain Friction Welding with neat sketch. State its benefits and limitations. 04
(c) Enlist various NDT methods and explain Radiographic inspection method. 07
OR
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Q:5 (a) Explain construction of welding symbols with neat sketch. 03(b) Explain Thermit welding. 04
(c) Explain Ultrasonic Inspection method for Weldment with neat sketch. 07
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