Answer :
C) Submerged Arc Welding (SAW) uses a flux to protect the weld pool, distinguishing it from other welding processes such as Resistance Welding, Electron Beam Welding, and Gas Metal Arc Welding (GMAW).
The welding process that uses a flux to protect the weld pool is Submerged Arc Welding (SAW). In SAW, the weld area is covered by a blanket of granular flux, which helps to protect the molten weld pool from atmospheric contamination and stabilize the electric arc. The flux becomes conductive when it is molten, providing a path for the welding current to pass between the electrode and the workpiece. This process is distinct from Resistance Welding, Electron Beam Welding, and Gas Metal Arc Welding (GMAW), where other means are used for protecting the weld zone or no flux is involved.
