Question 127General Subjects - QMED

70% to pass

Setting up a welding job, where the work is the positive pole and the electrode is the negative pole for the arc, is known as a/an _______________.

Ainert-arc welding circuit
Breverse polarity welding circuit
Cstraight polarity welding circuit
Dshielded-arc welding circuit
AI Explanation

The correct answer is C) straight polarity welding circuit. In a straight polarity welding circuit, the work piece is connected to the positive pole of the welding power source, while the electrode is connected to the negative pole. This configuration allows the electron flow to travel from the electrode to the work piece, creating the desired arc for welding. The other options are incorrect because: A) Inert-arc welding uses an inert gas, such as argon or helium, to shield the weld from atmospheric contamination, which is a different welding technique. B) Reverse polarity refers to the opposite configuration, where the electrode is connected to the positive pole and the work piece to the negative pole. D) Shielded-arc welding uses a flux-coated electrode to create a shielding gas, which is a different welding process.

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Official Resources
46 CFR Machinery & Electrical 46 CFR Engineering USCG National Maritime Center
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