Flux used for brazing cast iron is: (a) A mixture of boric acid, borax and a wetting
Question:
Flux used for brazing cast iron is:
(a) A mixture of boric acid, borax and a wetting agent
(b) A mixture of boric acid, borax of fluoride with a wetting agent
(c) Chlorides and fluorides mixed with water
(d) None of the above
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