Roll No. ...................... Total No. of Questions: 08]
[Total No. of Pages: 02
..
M.Tech. WELDING TECHNOLOGY SUBJECT CODE: PE - 504
Paper ID : [E0444] INote : Please fill subject co'de and paper ID onOMRI
Time: 03 Hours Instruction 1) 2)
Ql) (a)
Maximum Marks:
100
to Candidates:
Attempt any Five questions. All questions carry equal marks.
What is welding? Describe the solidification mechanism occurred in fusion ofweldments?
(b) Explain the effects of alloying of various elements on welding of carbon alloy steel? Q2) Define welding arc? Explain the mechanism of arc initiation and its maintenance?
Q3) (a) What is arc blow? Describe in brief the factor which causes the arc blow? (b)
Why coating of electrode is necessary? What are the different types of coating? Explain in brief.
Q4) How GTAWand GMA W differentiated from each other on the basis of process, parameters, equipments, uses and applications? Q5) What are the requirements of an electric arc welding power source? Describe in brief the A.C. welding power sources with the help of suitable sketches?
J -40 18{812 9J
P.T.O.
Q6) . Explai~ the various forces affecting the transfer of material in welding? Also describe in brief the different modes of metal transfer in welding?
Q 7) (a) Explain the theory and mechanisl~ of solid stat~welding with the help of suitable diagrams? (b)
What is the scope and applications of laser beam welding?
Q8) Write sho~ note on any two of the following: (a) Metallurgical changes occurred in weld metal (b) Ultrasonic welding (c) DC rectifiers
GNDEC M.Tech PE December 2009 Welding Technology.pdf ...
Describe the solidification mechanism occurred in fusion. ofweldments? (b) Explain the effects of alloying of various elements on welding of carbon. alloy steel? Q2) Define welding arc? Explain the mechanism of arc initiation and itsmaintenance? Q3) (a) What is arc blow? Describe in brief the factor which causes the arc.
or its equivalent. Page 3 of 7. Whoops! There was a problem loading this page. GNDEC M.Tech PE December 2009 Industrial Tribology.pdf. GNDEC M.Tech PE December 2009 Industrial Tribology.pdf. Open. Extract. Open with. Sign In. Main menu. Displaying GN
Page 1 of 60. Roll No. .......................... 1 \. t Total No. of Questions: 08] (Total No. of Pages : 02. M.Tech. METHODS ENGINEERING AND ERGONOMICS. ~:PE-523 .~: [E0460]. (Note: Please fill subject code and paper ID on OMR). Time: 03 Hours. Ins
Page 1 of 60. r . Roll Xo. ...................... z- t?Total Xo. of Questions : 08] [Total Xo. of Pages.: 01. Paper ID [PE504). (Please fill this Paper ID in OMR Sheet). M.Tech. . WELDING TECHNOLOGY (PE - 504). Time: 03 Hours. Instruction to Candidat
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