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  1. In welding magnesium with TIG arc welding, direct current with ________ is used.

    2. A.

     Straight polarity
    B.

     Reversed polarity
    C.

     Both (A) and (B)
    D.

     None of these

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    Answer : Option B

    Explanation :

    In welding magnesium with TIG arc welding, direct current with Reversed polarity is used
    The preferred polarity of the GTAW system depends largely on the type of metal being welded.

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