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True or False? Arc welding machines used for GTAW can be either AC and/or DC, but must supply a constant current. correct answers true In GTAW, a high frequency voltage is superimposed on the DC circuit for the purpose of ____ the arc. correct answers starting In a constant current volt-ampere...

In gas tungsten arc welding with _____, approximately 70% of the heat is generated at the electrode and 30% on the workpiece. correct answers DCEN True or False? DCEN requires a larger electrode diameter than DCEP for the same current. correct answers False True or False? DCEP cleans surface o...

It should be broken squarely correct answers Which of the following is true of breaking and remelting tungsten? Pointed, DCEN correct answers When setting up to make a GTA weld on low carbon steel, the Tungsten should be _________ and the welding machine set for _________ Thoriated tungsten co...

Which specification defines the performance characteristics & rating procedures for ac/dc arc-welding equipment? correct answers NEMA Specification EW-1, Electric Arc-Welding Power Sources The GTAW power source provides electrical current, which is also called _____. correct answers amperage P...

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 t...

Advantage or Limitation: GTAW has a low deposition rate. correct answers Limitation Advantage or Limitation: The ability to weld a variety of a(n)_________ of the tig welding process. correct answers Advantage Advantage or Limitation: GTAW has a higher learning time. correct answers limitation...

With GTAW the heat of the arc is transferred to the work through a non-consumable? correct answers Tungsten electrode GTA W requires an inert gas too? correct answers Shield the weld puddles GTA W is used primarily when? correct answers High quality welds are mandatory For what application ...

What does TIG stand for? correct answers Tungsten Inert Gas Define inert. correct answers Doesn't react with metals or other gases. Which gases are used for TIG? correct answers Argon, Helium, argon-helium, and argon-hydrogen What are the principal advantages of TIG? correct answers Heat a...

2 % tungsten is what color? correct answers red inert gases are gases that do not react with ? correct answers other gases in the vicinity of the weld, stainless steal and nickle alloys using ____ as shielding gas for the AC GTAW operation one must contend with the less arc stability and less ...

Gas Tungsten Arc Welding correct answers What does GTAW stand for? Constant Current correct answers What type of power source does GTAW require? AC correct answers What polarity should be used for Aluminum and Magnesium? DC- correct answers What polarity is used for most other metals beside...

Air-cooled torches use _____ to cool the electrode and the internal components of the torch. correct answers Shielding gas The _____ is designed for welding on light-gauge metals at less than 200A. correct answers Air-cooled torch The _____ is adjusted a necessary for different joints. correct...

GTAW correct answers Gas Tungsten Arc Welding, sometimes referred to as TIG or Heliarc. TIG correct answers Tungsten Inert Gas Welding GTAW History correct answers late 1930's, originally used Helium and DCEP inert gas correct answers An inert gas is any gas that is not reactive with eleme...