GMAW & FCAW (REVIEW QUESTIONS)
**FCAW Process**
Of the two basic FCAW processes, one is self-shielding and the other uses shielding gas. What is the
second FCAW process? Shielding gas
**GMAW Arc Stabilization**
In GMAW, the arc is stabilized and the molten filler and base metals are pro...
Of the two basic FCAW processes, one is self-shielding and the other uses shielding gas. What is the
second FCAW process? 💡 Shielding gas
**GMAW Arc Stabilization**
In GMAW, the arc is stabilized and the molten filler and base metals are protected from oxidation by
shielding gas. What protects the arc and metals? 💡 Shielding gas
**Petroleum Product Safety**
When working near oil, grease, and other petroleum products, keep large amounts of oxygen away from
them. Why is oxygen a concern? 💡 Large amounts of oxygen can ignite flammable materials
**Arc Voltage**
Depending on the range selected, for each 100 amperes of current, the arc voltage of a welding machine
is typically lower than the open-circuit voltage by 2-3 volts. How does arc voltage change with current?
💡 Lower by 2-3 volts
**Heat Generation**
The welding arc generates intense heat that ranges from 6,000 to 10,000 Fahrenheit. What is the
temperature range of the welding arc? 💡 6,000 to 10,000 F
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