TIG TEST QUETIONS AND ANSWERS

What does the gas do in arc welding? - ️️protects weld from atmosphere porosity corosion What does high frequency do in AC welding? - ️️provides cleaning action and minimizes the unbalance which torch requires three hoses? - ️️Water cooled torches What are the adv of Argon? - ️️cheaper smoother arc cools tungsten rod less heat transferred What are the purposes of the three wires in the water torches? - ️️Gas, Water in, Water out Disadvantage of Tig compared to all other processes? - ️️slowest metal deposition What Gases are used for TIG? - ️️Argon helium or a mix Why do you use AC for aluminum? - ️️DC - negative will release too many electrons causing too much heat. it will melt through. What are the three ways to start welding? - ️️scratch, HF, touch WHAT DOES EWX stand for? - ️️E- electrode W-Tungsten X- whatever alloy your using (ex: Pure or 2% thoriated What does SCFH stand for? - ️️Standard cubic feer per hour What does TIG stand for? - ️️Tungsten Inert Gas Inert Vs Active - ️️Inert- does not melt with base metal Active - Melts with base metal Is argon inert or active? - ️️Argon = INERT HELIUM = INERTADVANTAGE OF HELIUM - ️️SMALLER HAZ Transfers lots of heat use on thick metals COLOR EWP - ️️green COLOR EWCe-2 - ️️ORange COLOR EWLa-1 - ️️black