?The modulated current transfer process can be used to make code quality root welds ______.
A. ?only if the root face is 1/8 in (3 mm) and the root opening is 7/32 in. (2.7 mm)
B. ??when the root face is twice the size of the root opening but less than 5/32 in (4 mm)
C. ?even if the root opening and root face may vary as much as the code might allow
D. ?only in ferrous (steel) alloys
Answer: C
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