Welder Red Seal · Question
What is the primary function of a gas lens in a GTAW torch assembly?
A gas lens contains fine mesh screens that smooth out turbulence in the shielding gas flow. This creates a longer, more stable column of inert gas, improving sh
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Question: What is the primary function of a gas lens in a GTAW torch assembly?
Answer options:
- To focus the arc for deeper penetration
- To amplify the welding current at the tip ✅ To create a longer, more uniform column of shielding gas
- To cool the tungsten electrode more effectively
Correct answer: To create a longer, more uniform column of shielding gas
Explanation: A gas lens contains fine mesh screens that smooth out turbulence in the shielding gas flow. This creates a longer, more stable column of inert gas, improving shield effectiveness and allowing for greater tungsten stick-out, which is especially useful for accessing tight joints.
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