Welder Red Seal · Question
Which set of conditions is required to achieve spray transfer mode in Gas Metal Arc Welding (GMAW)?
Spray transfer occurs above a critical 'transition current' and requires a high energy level (high voltage/amperage) and an inert gas-rich atmosphere, typically
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Question: Which set of conditions is required to achieve spray transfer mode in Gas Metal Arc Welding (GMAW)?
Answer options:
- Low voltage, low wire feed speed, and 100% CO2 shielding gas. ✅ High voltage, high wire feed speed, and an argon-rich (>85%) shielding gas.
- A short arc length, DCEP polarity, and a helium-argon gas mixture.
- Pulsed current, low background amps, and 75% Ar / 25% CO2 gas.
Correct answer: High voltage, high wire feed speed, and an argon-rich (>85%) shielding gas.
Explanation: Spray transfer occurs above a critical 'transition current' and requires a high energy level (high voltage/amperage) and an inert gas-rich atmosphere, typically with at least 85% argon, to allow fine droplets of molten metal to 'spray' across the arc.
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