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  1. The flux commonly used in brazing is

    2. A.

     Zinc chloride
    B.

     Ammonium chloride
    C.

     Resin plus alcohol
    D.

     Borax

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    Answer : Option D

    Explanation :

    The flux commonly used in brazing is Borax
    A flux is required for all brazing and soldering applications.
    The purpose of the flux is to remove oxides from the base material and to prevent oxidation during the heating process, thus promoting the free flow of the brazing filler metal

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