Welding Level 2, Module 8 questions with verified solutions

GTAW If you see the label TIG on a welding machine, that machine is considered to be what kind of welding machine? oxygen During the GTAW process, UV radiation in the atmosphere near the weld can ionize ___________________. direct current electrode negative (DCEN) GTAW is most commonly performed using ___________________. 1/2 inch High voltage, high frequency current creates a very stable arc that is able to jump a gap of about _____________________. arc starting Advanced features and controls on a GTAW machine include high frequency intensity control for better _____________________. increase the duty cycle to 100 percent. Setting the amperage at 200 amps for a welding machine rated at 300 amps with a 60 percent duty cycle will ____________________. argon and helium The two principle shielding gases used for GTAW are ______________________. argon When welding with GTAW in a cross draft situation, better shielding is provided by ____________________. AWS A5.28 The ____________________ Specification is for Low Alloy Steel Electrodes and Rods for Gas Shielded Arc Welding. Certificate of Conformance When filler metal is graded for rigid control fabrication, the purchaser receives a _____________________. GTAW Which welding process is recommended for the defect repair on clean magnesium castings? 500 degrees (F) Titanium is sensitive to embrittlement by oxygen, nitrogen, and hydrogen at temperatures above ____________________. SMAW GTAW commonly uses the same power sources and welding machines used for ____________________. larger nozzles Higher shielding gas flow rates are required with ____________________. helium The typical shielding gas for GTAW on deoxidized copper that is over 1/8 inch thick is ____________________. pure Of the various types of tungsten electrodes available, the tungsten electrodes that are used for AC welding are ______________________. thoriated electrodes Ceriated and lanthanted electrodes are used as non-radioactive substitutes for _____________________. zirconiated Which type of tungsten electrodes can be balled or spherical? collet assembly The electrode is clamped in place in the torch body by the _____________________. electrode back cap To adjust the electrode stickout or to remove the electrode, loosen the ____