Download AKTU B-Tech 6th Sem 2016-2017 EME 022 Advance Welding Technology Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 6th Semester (Sixth Semester) 2016-2017 EME 022 Advance Welding Technology Question Paper

Printed Pages : 1 Roll No.| l l l l I l l l l l EME-022
B.TECH.
THEORY EXAMINATION (SEM?VI) 2016-17
ADVANCE 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. Explain the following: 10 X 2 = 20
(a) Brazing
(b) Arc blow
(c) Spray welding
(d) Importance of Schaef?er diagram
(e) Electroslag welding
(f) Importance of welding
(g) Life prediction of welded structures
(h) Modes of Metal transfer
(i) TIG and MIG.
(i) What is hard facing
SECTION ? B
2. Attempt any five of the following questions: 5 x 10 = 50
(3) Explain the principle behind generation of LASER and also write its various
applications. Describe Laser beam welding?
(b) Describe principle, working and applications of Electron Beam Welding. What are the
possible problems / difficulties in it and how it can be dealt with?
(c) What are ultrasonic waves / Vibrations and how it is generated, and what are its various
applications? Describe ultrasonic welding.
(d) Describe with sketches, the mechanism of explosive welding. Also brie?y write about
weld ?interface and welding parameters. What are the applications of explosive
welding?
(e) What is meant by hardfacing? How hardfacing with electric arc is theoretically
consideration as simultaneous alloy steel making in electric arc furnace and heat
treatment? What welding process may be used for hardfacing? Enumerate the
advantages and applications of hardfacing.
(f) Explain the terms ?Transferred? modes and non transferred modes used in Plasma Arc
welding. What ?Plasma?? Describe plasma arc welding and mention its advantages.
(g) Brie?y describe the various defects and distortion in welding and its causes and
remedies?
(h) What are the advantages and limitation of friction welding process? Explain the effect
of various process parameters on friction welding?
SECTION ? C
Attempt any two of the following questions: 2 x 15 = 30
3. Draw symbols and sketches and write the design considerations for Lap?joint and butt ?joint.
How life prediction estimation can possibly be done?
4. Draw characteristics (current?voltage) curve of Arc and of power?resources. Explain how
stability could be achieved?
5. Draw temperature distribution on plate around the arc weld at an instant. Explain what do you
mean by heating-rate and cooling rate and that how it affects the properties of weld?