Illustrate the following:
i. Hard soldering
ii. Soft soldering.
Illustrate with neat diagram the torch technique of soldering?
prepare brief notes on following weld defects.
(b) Under cutting
Why is cleaning of metal is significant for successful welding? Discuss?
Illustrate the metallurgical effects in resistance welding cycle?
Illustrate the process of welding gray cast iron using manual metal arc welding?
prepare brief notes on following:
(a) Shielding gas in arc welding.
(b) Fluxes in arc welding.