GUJARAT TECHNOLOGICAL UNIVERSITY
Subject Code: 2162506
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Subject Name: Metal Joining Technology
Time: 10:30 AM TO 01:00 PM
SEMESTER-VI(NEW) — EXAMINATION - SUMMER 2019
Date: 10/05/2019
Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
MARKS
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Q.1
(a) Define welding. 03
(b) List advantages of welding over riveting. 04
(c) Classify welding as per AWS. 07
Q.2
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(a) Define gas welding. 03
(b) List characteristics of flux in welding. 04
(c) Sketch different gas welding flames. 07
OR
(c) List gas welding equipments and their applications. 07
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Q.3
(a) What is an arc? 03
(b) What is carbon active welding? 04
(c) Describe GMAW. 07
OR
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Q.3
(a) What is polarity? 03
(b) What is submerged arc? 04
(c) Describe GTAW. 07
Q.4
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(a) What is solid state welding? 03
(b) List any 2 welding defects (other than distortion) and their causes. 04
(c) Explain friction inertia welding in detail. 07
OR
Q.4
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(a) What is chemical welding? 03
(b) Which are the causes of welding distortion? 04
(c) Explain thermit welding in detail. 07
Q.5
(a) What is NDT? 03
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(b) Explain MPT. 04
(c) Classify welding electrode. 07
OR
Q.5
(a) What is resistance welding? 03
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(b) Write down principles of Radiography Testing. 04
(c) Draw a neat sketch of standard location of elements of welding symbols. 07
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