GTAW Exam #2 || with 100% Correct Answers.

Touch start Pilot arc High-frequency start Pulse start correct answers What are the four arc initiation methods? Sugaring correct answers What is the gray/flaked appearance on stainless steel welds known as? Nitrogen dioxide correct answers Which toxic gas only occurs within 6 inches of the welding arc? 15-35 CFH correct answers What is the suggested flow rate for argon according to the book? Hydrogen correct answers Aluminum is very susceptible to porosity caused by the presence of which element? Magnesium correct answers Which material is often confused with aluminum, and therefore welded improperly? Smoother, quieter arc Reduced penetration Cathodic cleaning action on EP Lower cost Greater availability Lower flow rates required Better cross-draft resistance Easier arc starting correct answers What are advantages of argon, as compared to helium? AC and Argon correct answers What polarity and shielding gas is preferred for welding magnesium? Spark-gap oscillator correct answers HF start utilizes what device to superimpose a high-voltage AC output to initiate the arc? Longer weld times Higher cost Higher heat input More distortion correct answers What are disadvantages of using a wider than necessary groove angle? Wire feeder correct answers What component makes the process semi