Welder Red Seal · Question
For an FCAW electrode classified as E71T-1C, what does the 'C' at the end of the designation signify?
The letter at the end of the main classification (e.g., 'C' or 'M') for a gas-shielded FCAW electrode indicates the required shielding gas. 'C' stands for 100%
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Question: For an FCAW electrode classified as E71T-1C, what does the 'C' at the end of the designation signify?
Answer options:
- It indicates the wire is for cast iron
- It indicates the electrode has Charpy V-notch impact requirements ✅ It indicates the recommended shielding gas is 100% CO2
- It indicates the wire has a complex flux system
Correct answer: It indicates the recommended shielding gas is 100% CO2
Explanation: The letter at the end of the main classification (e.g., 'C' or 'M') for a gas-shielded FCAW electrode indicates the required shielding gas. 'C' stands for 100% Carbon Dioxide (CO2), while 'M' indicates a mixed gas, typically Argon/CO2.
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Question explanations
- A welder is fabricating a pressure vessel component using FCAW-G with an E70T-1 wire. The procedure specifies
- A welder is preparing to weld 20 mm (0.8 in) thick high-strength low-alloy (HSLA) steel using FCAW-G. The weld
- A structural steel fabricator is using FCAW-S (E71T-8 wire) to weld heavy sections of structural steel in an o
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