Question 1:
Illustrate the following:
i. Hard soldering
ii. Soft soldering.
Question 2:
Illustrate with neat diagram the torch technique of soldering?
Question 3:
Write brief notes on following weld defects.
(a) Porosity
(b) Under cutting
(c) Cracks.
Question 4:
Why is cleaning of metal is significant for successful welding? Discuss?
Question 5:
Illustrate the metallurgical effects in resistance welding cycle?
Question 6:
Illustrate the process of welding gray cast iron using manual metal arc welding?
Question 7:
Write brief notes on following:
(a) Shielding gas in arc welding.
(b) Fluxes in arc welding.