15. A GTAW electrode is v usually installed after the nozzle because the __ a nozzle grounds the entire torch assembly b. electrode stickout (ESO) is measuremently the end of the nozzle c. electrode back cap threads onto the noz- zle to form a seal d. nozzle determines the maximum outer diameter of the electrode

The correct answer is b. electrode stickout (ESO) is measured from the end of the nozzle.<br /><br />In Gas Tungsten Arc Welding (GTAW), also known as Tungsten Inert Gas (TIG) welding, the electrode stickout (ESO) is the length of the electrode that extends beyond the end of the nozzle. The ESO is an important parameter in GTAW as it affects the stability of the arc and the quality of the weld. It is typically measured from the end of the nozzle to the tip of the electrode.