Question

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Explanation:

Identify the function of the welding component

Using the Shielding Gas Function and GMAW Consumables Identification knowledge points

• The question asks for the component that supplies shielding gas to protect the molten weld pool from atmospheric contamination.
• The nozzle directs the flow of shielding gas around the contact tip and onto the weld puddle.

Evaluate the given options

Using the GMAW Consumables Identification knowledge point

• Contact Tip: Guides the wire electrode and transfers welding current.
• Diffuser: Distributes the shielding gas evenly inside the nozzle.
• Nozzle: Directs and delivers the shielding gas stream to the weld area to protect the molten metal.
• Liner: Guides the welding wire through the gun cable to the contact tip.

Answer:

• Contact Tip
• Diffuser
• Nozzle (Correct answer)
• Liner