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  1. For arc welding

    2. A.

     Alternating current with high frequency is used
    B.

     Alternating current with low frequency is used
    C.

     Direct current is used
    D.

     Any one of these

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    Answer : Option C

    Explanation :

    Arc welding is a welding process that is used to join metal to metal by using electricity to create enough heat to melt metal, and the melted metals when cool result in a binding of the metals

    For arc welding Direct current is used

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