Welder Red Seal · Question
What is a 'run-on' and 'run-off' tab used for in welding?
Run-on and run-off tabs are temporary pieces of metal attached to the beginning and end of a weld joint. They allow the welder to initiate and terminate the arc
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Question: What is a 'run-on' and 'run-off' tab used for in welding?
Answer options: ✅ To start and end the weld outside the actual joint, ensuring full weld penetration at the ends
- To measure the preheat temperature of the joint
- To support the workpiece during welding
- To contain excess shielding gas flow at the weld edges
Correct answer: To start and end the weld outside the actual joint, ensuring full weld penetration at the ends
Explanation: Run-on and run-off tabs are temporary pieces of metal attached to the beginning and end of a weld joint. They allow the welder to initiate and terminate the arc outside the critical area, ensuring full penetration and good quality at the actual start and end of the production weld.
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