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Name of the University : Annamalai University
Department : Welding Engineering And Technology
Degree : Diploma
Subject Name : Fusion Welding Processes
Website : annamalaiuniversity.ac.in
Document Type : Old Question Paper

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December 2013 : https://www.pdfquestion.in/uploads/annamalaiuniversity.ac.in/6108-dec2013-7855.pdf
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Fusion Welding Processes Question Paper :

Diploma Examination December 2013. : (Welding Engineering And Technology)
Time : Three hours
Maximum : 100 marks

Related : Annamalai University Welding Metallurgy And Weldability Testing Diploma Question Paper : www.pdfquestion.in/6112.html

Answer any FIVE questions. : (5 ´ 20 = 100)
All questions carry equal marks. :
1. (a) Explain the oxy-hydrogen and air acetylene welding process with a neat sketch.
(b) With suitable sketch, explain any two welding torches.
2. (a) Explain in detail how arc is initiated and their characteristics in arc welding.
(b) What are the requirements for an arc welding power sources?

3. (a) Explain the types and classification of coated electrodes of AWS and IS system.
(b) Explain the meaning of E31132-CL, as per BIS low alloy steel arc welding electrode specification.

4. (a) Briefly explain the working principle and process parameters of manual metal shield arc welding.
(b) Is it possible to weld dissimilar metals? Justify.

5. (a) Explain with a neat sketch of Electro gas welding and its process parameters.
(b) Write the advantages, limitations and applications of Plasma arc welding process.

6. (a) Explain how the surfacing is done by submerged arc welding process.
(b) Explain with a neat sketch of TIG welding and its industrial applications.
7. (a) Explain the method of manufacturing of electrodes.
(b) Explain the working principle of CO2 welding process.

8. (a) Explain the working principle of electro-slag welding and how it is used for modification of surfaces.
(b) What is atomic hydrogen welding? List out the various applications and limitations.

Diploma Examination, 2013 :
Answer any FIVE questions : (5×20=100)
All question carry equal marks :
1. a) Explain with a neat sketch of a double stage pressure regulators.
b) With suitable sketch, explain variants of oxy-fuel gas welding.
2. a) Explain the Voltage-Ampere characteristics for a welding process.
b) What are the basic requirements for a welding transformer?

3. a) Explain any two types of coated electrodes.
b) Describe in detail about the role of fluxes and its ingredients.
4. a) Explain with a neat sketch CO¬¬2 welding and its process parameters.
b) Is it possible to weld dissimilar metals? Justify.

5. a) Explain with a neat sketch of submerged arc welding.
b) Write the advantages, limitations and applications of atomic hydrogen welding process.
6. a) Explain the different types of transformers used in arc welding process.
b) Explain with a neat sketch of flux cored arc welding process and its industrial applications.

7. a) Write the difference between coated and covered electrode.
b) Explain in detail about selection of electrodes for welding brittle and ductile materials.
8. a) Explain the working principle of electro-gas welding and how it is used for modification of surfaces.
b) List the various advantages, applications and limitations of plasma welding.

Diploma Examination – 2012 :
1. a) Explain types of welding flames and flames characteristics’.
b) Explain oxy-hydrogen welding processes.

2. a) Explain types of metal transfer and factors affecting metal transfer.
b) Explain DC generators and transformers.
3. a) Explain the types and classification of coated electrodes of B S and I S system.
b) Explain the Ingredients and functions of coating elements.

4. a) Explain the working principles operation and process variables of carbon arc welding
b) Explain the advantages, limitations and applications of tungsten inert gas welding
5. a) Explain working principle of flun cored arc welding.
b) Explain working principle of CO2 welding processes.

6. a) Explain the advantages, limitations and applications of electro gas welding.
b) Explain the working principle of atomic hydrogen welding process.

7. a) Explain the working principle of plasma arc welding.
b) Explain the advantages, limitations and applications of electro slag welding.
8. a) Discuss briefly pressure regulator and welding torch.
b) Explain the method of manufacturing of electrodes.