IIW IWT Practice Questions - IIW International Welding Technologist (IWT) Exam

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Why is direct current electrode positive (DCEP / reverse polarity) generally preferred for manual metal arc welding with most coated electrodes?

It concentrates more heat in the electrode to increase deposition rate It produces a cleaning action and good penetration with deeper fusion into the workpiece It eliminates the need for any flux coating It allows welding without a return (earth) lead

Correct Answer:

It produces a cleaning action and good penetration with deeper fusion into the workpiece

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