A: Very simply efficiency. DC requires rectification from AC. Which will waste this process as non working heat
Shielded Metal Arc Welding, known colloquially as "stick".
There are far more than 5 types or processes of welding. Currently the American Welding Society (AWS) states that there are more than 80 different welding and joining processes. However, some of the common welding processes include shielded metal arc welding (SMAW), gas metal arc welding (GMAW), gas tungsten arc welding (GTAW), flux cored arc welding (FCAW), and oxyfuel gas welding (OFW).
smaw welding is sheilded metal arc welding
Arc crater is the depression in the molten metal created by the end of the welding electrode during the welding of metal.
If you are asking for the correct nomenclature it is Shielded Metal Arc Welding.
Arc welding uses an electric arc to melt and join metal pieces together, while resistance welding uses heat generated by the resistance to electric current flow between two metal pieces to join them together. Arc welding is more versatile and can be used for various types of metals, while resistance welding is more suited for high-speed production and is commonly used in automotive and appliance manufacturing.
If you are asking for the correct nomenclature it is Shielded Metal Arc Welding.
ME
Mike Gellerman has written: 'Practical shielded metal arc welding' -- subject(s): Shielded metal arc welding 'Welding fundamentals' -- subject(s): Welding
Arc welding uses an electrical current to create enough heat to melt metal. Any type of welding that uses an electric arc is technically arc welding. However, most people use the term 'arc welding' to mean shielded metal arc welding (SMAW), or 'stick welding'. SMAW, MIG, and flux core wire welding use the filler metal as both electrode and filler; TIG welding uses an electric arc to heat the base metal and a separate filler rod to add metal to the weld.
shielded metal arc welding does not required any shielding gas
ARC welding uses large amounts of electricity to melt the metal, not a hot flame. So no, LPG cannot be used for ARC welding.