In EGW, the molten weld pool is protected from the atmosphere by ____ or by a flux core in the filler electrode.
A) oxygen in the atmosphere
B) a thick blanket of slag
C) shielding gas
D) a thick blanket of molten flux

Question

Quizplus · Accepted Answer

The molten weld pool is protected from the atmosphere by shielding gas which prevents the molten metal from reacting with oxygen in the air and forming defects in the weld. Slag and flux can also provide protection, but the question specifically mentions that the flux is contained in the filler electrode and not separate from it.

In EGW, the Molten Weld Pool Is Protected from the Atmosphere