Certified Welding Inspector Practice Exam

Which method is used in Air Carbon Arc Cutting?

1. A jet of air to carry solid particles

2. A stream of oxygen to increase heat

3. A jet of air to remove molten metal

4. A vacuum to collect waste material

The correct answer is: A jet of air to remove molten metal

Air Carbon Arc Cutting is a process that primarily utilizes a jet of high-pressure air to blow away molten metal that has been created during the cutting process. This method is effective because it helps to clear the cutting area, ensuring that the cut remains visible and preventing the molten metal from creating additional resistance or interfering with the cutting operation. In this process, an electrode is used to create an arc that melts the metal, and the high-velocity jet of air serves to remove the molten material from the cut, enhancing efficiency and precision. This method is particularly valuable in situations where visibility of the cut and quick removal of molten material are essential, such as in maintenance welding or in industrial applications. The other methods mentioned serve different purposes: while a jet of air can carry solid particles, it does not specifically address the removal of molten metal like in Air Carbon Arc Cutting. A stream of oxygen is more commonly associated with oxy-fuel cutting processes, designed to increase temperature for cutting but does not apply here. Lastly, a vacuum to collect waste material is not a function of the Air Carbon Arc Cutting process; it is more indicative of cleanup methods post-cutting rather than part of the cutting technique itself.