It depends on what process you're planning on testing on. When I tested on 3/8 for stick it was open root w/ 6010 root pass and 7018 hotpass and cap. It just takes a little practice. Make sure your root face is as uniform as possible and keep a short arc lenght on your root. Not sure what you've been taught but I was always taught to keep the rod as close to a 90deg. angle to the work as possible and push so you barely see any light from the arc. On your hot pass and cap, the z-weave works well pausing for about 2 sec at the ends and moving rather fast thru the middle (dont leave a dip though) If the weave isnt your style, ask the test administrator if they will allow you to run stringer passes. With GTAW the root face even more critical. Make sure and clean the scale and junk off of both sides of the plate. (especially using GTAW but doesnt hurt using SMAW either) On GTAW using a dia. cup works well to kind of weave the puddle to avoid burning thru too far. Then keep getting larger in cup size the more passes you add. If you've got more specific questions feel free to shoot me an email.
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