?Why are the ends of tack welds ground to a featheredge?
A. ?To make it easier to see as you weld across the tack welds.
B. ?It prevents the shielding gas from becoming turbulent and losing good gas coverage.
C. ?It stops porosity.
D. ?To make it easier to have 100% penetration at the ending and beginning of the root weld.
Answer: D
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