In the atmosphere near the weld, the UV radiation from the GTAW process can ionize _____.

GTAW is most commonly performed using _____.

A high-voltage, high-frequency current used in GTAW work creates an arc that can jump a gap of about _____.

One of the advanced features associated with the GTAW process is the high-frequency intensity controls that provide better _____.

Setting the amperage at 200 amps for a welding machine that is rated 300 amps at 60-percent duty cycle will _____.

On a GTAW torch, to change an electrode or adjust its stickout, the welder loosens the _____.

Of the various types of tungsten electrodes available, the tungsten electrodes that are used for AC welding are _____.

The two principal shielding gases used for GTAW are _____.

When welding with GTAW in a cross draft situation, better shielding is provided by _____.

Carbon steel filler metals are identified by AWS Specification A5.18 and low-alloy steel filler metals are identified by AWS Specification _____.

When filler metal is graded for rigid control fabrication, the purchaser receives _____.

Which welding process is recommended for the repair of a defect on clean magnesium castings?

Titanium becomes sensitive to embrittlement by oxygen, nitrogen, and hydrogen at temperatures above _____.

GTAW commonly uses the same power sources and welding machines used for _____.

Higher shielding gas flow rates are required with _____.

The typical shielding gas for GTAW on deoxidized copper that is over 1/8" (3.2 mm) thick is _____.

Ceriated and lanthanated electrodes are used as non-radioactive substitutes for _____.

For which one of the following types of tungsten electrodes can the electrode tip be balled (spherical)?

For GTAW, the electrode is clamped in place inside the torch body by the _____.