Welding 2, Module 8 Exam 2025 Questions & Answers with 100% Correct Answers | Verified

In the past, GTAW was called_________________. Today the, the nonstandard TIG, is still used, including in the control nomenclature marked on some welding machines. - (TIG) Tungsten Inert Gas, welding A combination on the arc and the gas generates substantial levels of __________________, which reacts with the oxygen in the area of the weld. - ultraviolet light or(UV) UV radiation can ionize oxygen in the atmosphere near the weld, which can lead to a rise in ozone and ___________________ - nitrogen dioxide levels. It is recommended that the walls of the work area be _______________ with a paint that reduces reflections from the UV light generated by the GTAW process. - painted ___________________ nonstandard term STRAIGHT POLARITY, is almost always used for performing GTAW on Ferrous and nonferrous materials. - Direct Current Electrode Negative (DCEN) This high voltage, high frequency current creates a very stable arc that is able to jump a gap of about ___________ - 1/2 inch(=13mm). High frequency current has such low amperage, it creates ________________. - very little heat High Frequency has 2 purposes. to stabilize AC and allow DC arc to be started without touching the _________________ to the work. High voltage allows it to jump the gap between the two. - tungsten electrode Welders use ___________ to perform GTAW. The type of welding current (DCEN, DCEP) depends on the type and thickness of the BASE METAL. - CC welding machines ANy welding machine that produces ___________, such as those used for SMAW, can be used. - constant current