Demonstration should include

• selecting the correct shielding gas to get the best result from the filler metal
• ensuring the work-piece is as clean as possible
• setting the power source according to the manufacturer’s instructions for wire polarity
• following wire electrode specifications to set the proper wire feed speed (amperage) and voltage
• aligning the proper electrode stick-out with the wire diameter being used
• positioning the wire electrode properly over the weld joint for maximum coverage based on the type of weld joint
• manipulating the welding gun effectively, based on the type of weld joint
• controlling travel speed

and may include

• stringer bead welding
• groove welding
• fillet welding
• out-of-position welding.

Process/Skill Questions:

• How does one select the appropriate wire and burn angle when performing GMAW operations?
• How does the wire feed speed affect the weld?
• Should the weld be pushed or pulled? Why?
• What are the characteristics of a proper weld?
• What corrections can be made if the weld is of poor quality?
• How should a proper weld sound?