2. [5 pts] Two aluminum plates (each of 2.9 J/mm specific melting energy) are joined together...
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2. [5 pts] Two aluminum plates (each of 2.9 J/mm specific melting energy) are joined together in SMAW with a copper electrode (of 6.1 J/mm specific melting energy). The welding machine runs on 220 volts and 25% loop efficiency to develop an 84 mm weld cross sectional area and 300 mm weld length in 30 sec. What is the operation current (in Amp) of the welding machine? 2. [5 pts] Two aluminum plates (each of 2.9 J/mm specific melting energy) are joined together in SMAW with a copper electrode (of 6.1 J/mm specific melting energy). The welding machine runs on 220 volts and 25% loop efficiency to develop an 84 mm weld cross sectional area and 300 mm weld length in 30 sec. What is the operation current (in Amp) of the welding machine?
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