Which welding process uses an electrical arc?

Which welding process uses an electrical arc?

• A. Arc welding
• B. Gas welding
• C. Oxy-fuel welding
• D. Soldering

Answer: (A)

The key idea here is how heat is generated to make the weld. Arc welding uses an electrical arc formed between an electrode and the workpiece, with current creating a hot, localized plasma that melts the metal to form a weld. That electrical arc is the defining heat source for this method, whether you’re doing MMA/SMAW, MIG, or TIG welding. Gas welding and oxy-fuel welding get their heat from a flame produced by burning gas with oxygen, not from an electrical arc. Soldering also doesn’t involve welding heat from a high-temperature arc; it joins parts with relatively low heat and a filler metal that melts at low temperature, without melting the base metals. So the process that uses an electrical arc is arc welding.

The key idea here is how heat is generated to make the weld. Arc welding uses an electrical arc formed between an electrode and the workpiece, with current creating a hot, localized plasma that melts the metal to form a weld. That electrical arc is the defining heat source for this method, whether you’re doing MMA/SMAW, MIG, or TIG welding.

Gas welding and oxy-fuel welding get their heat from a flame produced by burning gas with oxygen, not from an electrical arc. Soldering also doesn’t involve welding heat from a high-temperature arc; it joins parts with relatively low heat and a filler metal that melts at low temperature, without melting the base metals. So the process that uses an electrical arc is arc welding.