Welder Red Seal · Question
In the GMAW process, what is the typical outcome of having an excessively long electrode extension, also known as stick-out?
A long electrode extension increases the electrical resistance in the wire between the contact tip and the arc. This preheats the wire, causing a voltage drop t
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Question: In the GMAW process, what is the typical outcome of having an excessively long electrode extension, also known as stick-out?
Answer options:
- Increased amperage and deeper penetration ✅ Decreased actual amperage at the arc and a risk of increased spatter
- Increased voltage and a wider arc cone
- Smoother metal transfer and a narrower bead profile
Correct answer: Decreased actual amperage at the arc and a risk of increased spatter
Explanation: A long electrode extension increases the electrical resistance in the wire between the contact tip and the arc. This preheats the wire, causing a voltage drop that results in a lower actual welding current at a given wire feed speed. This often leads to poor penetration and an unstable, spatter-prone arc.
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