13.4 Chapter Conclusion
Stephanie Oostman
Summary
In this chapter, we covered that CAC-A can be used in the AC or DCEP polarity. The process is not limited to just cutting, but the welder can employ a variety of techniques to remove superficial material, gouge out a crack, or create bevels in the material. CAC-A can be utilized for cutting a range of material and does not require the metal to react to the carbon electrode such as in oxyacetylene cutting. CAC-A leaves carbon mineral deposits behind, so care should be taken to post-clean the area if more welding is needed. And, as always, welders should follow proper PPE and all manufacturer’s guidelines for safety.
Review Questions
- What polarity can be used with CAC-A?
- What metals should not be cut using CAC-A?
- What safety precautions should be in place prior to using CAC-A?
- What was the struggle with CAC prior to the addition of using compressed air?
- What gas is used to blow away the molten dross?
- Does the metal being used in conjunction with CAC-A have to react to the electrode to be cut or gouged?
- Is CAC-A considered an electric or gas thermal cutting process?
- How much preparation is needed for the CAC-A process?
- How is AAC different than CAC-A?
- Carbon arc air cutting is relatively quiet and does not require PPE for the ears such as ear plugs or over-the-ear muffs.
- True
- False
