?The squarewave provides the welder with a current that allows the molten weld pool to _______________.
A. ?be cleaner and reduces the need to clean all of the oxides off of the underside of the weld joint
B. ?flow freely onto the base metal with minimum fusion for thinner metals
C. ?have more gas coverage of the weld at a slower flow rate
D. ?have both deeper penetration and faster solidification
Answer: D
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