FCAW: Chapter 12 review questions by:(7th edition by Larry
Jeffus)
**Comparison with GMAW**
FCAW is similar to GMAW in that it uses a constant-potential (CP) or constant-voltage (CV) power
supply. What do these power supplies have in common? They are used in FCAW
**Atmospheric Contaminat...
FCAW: Chapter 12 review questions by:(7th edition by Larry
Jeffus)
**Comparison with GMAW**
FCAW is similar to GMAW in that it uses a constant-potential (CP) or constant-voltage (CV) power
supply. What do these power supplies have in common? 💡 They are used in FCAW
**Atmospheric Contamination**
The major atmospheric contaminants of the molten weld metal are oxygen and nitrogen. What are the
two main culprits? 💡 Oxygen and nitrogen
**Slag Functionality**
Slag helps an FCAW weld by protecting the hot metal from atmospheric effects, controlling bead shape
by serving as a dam or mold, and slowing cooling rates. What does slag do? 💡 It helps with protection,
control, and cooling
**Welding Gun Cooling**
Welding guns can be cooled using air or water. How can welding guns be cooled? 💡 By air or water
**Excessive Drive Rollers Pressure**
Excessive drive rollers pressure can cause crushed wire coverage, dropping flux inside the wire liner, and
potentially causing stoppage and "birds nest" formation. What problems arise from excessive pressure?
💡 Crushed wire coverage, dropped flux, and potential stoppage
**Large Diameter Electrodes**
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