WAF 231 GTAW Steel

What is the typical flow rate for pure argon in the GTAW process?
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Terms in this set (12)
What is the typical flow rate for pure argon in the GTAW process?
15 to 35 cubic feet per hour (cfh)
When using straight polarity in the GTAW process, 30% of the heat is on the electrode.
True
What is the correct polarity when welding mild steel using GTAW?
DC-
A water cooled torch uses the flow of shielding gas and a continuous flow of liquid coolant to cool the torch, whereas an air cooled torch only uses the flow of the shielding gas.
True
Match the following AWS classifications of carbon steel filler metal ER70S-X to their meanings.
ER: Electrode Rod
70: minimum tensile strength x 1000
S: solid electrode wire
-X: chemical composition and shielding
What effect does increasing or decreasing the welding amperage have? Check all that apply.
melting capability of base material
amount of penetration
width of the puddle
Which tungsten is considered radioactive? Check all that apply.
Thoriated
Which of the following are correct GTAW AWS filler metal classifications? Check all that apply.
ER5356
ER309L
ER347
ER70S-3
When welding on 1/16" thick mild steel, which DCEN amperage range and tungsten diameter is recommended?
50-90 DCEN welding amperage; 1/16 tungsten diameter electrode
Match each AWS tungsten classification to its designated color.
EWP: Green
EWZr-1: Brown
EWTh-1: Yellow
EWTh-2: Red
EWTh-3: Blue (correct test answer, but the EWLa-2 is Blue)
EWLa-1: Black
Unspecified: Chartreuse
Out of the gases listed below, what is the proper shielding gas used when welding carbon steel using the GTAW process?ArgonWhen preparing a tungsten for welding on carbon steel, you should always grind the electrode so grooves are length-wise, following the pathway of the current.True