Question 1:
Make a distinction between porosity and blow holes?
Question 2:
Illustrate the causes for formation of porosity in welds?
Question 3:
What are the situations required for the phase change in structures due to welding?
Question 4:
Illustrate the mechanism for the formation of heat affect zone in welds?
Question 5:
What are the constituents employed to coat on bare electrodes? Illustrate each of the ingredients?
Question 6:
Make a distinction between AC welding and DC welding?
Question 7:
Austenitic Stainless Steels are successfully welded through spot welding. Comment on this line.