How much gold concentration should be in the organic phase (dbc) before reduction by oxalic acid solution? Is it effective on purity of gold in reduction step? Define what is the ratio of dbc to oxalic acid solution in this step?

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Which plaster is used in gold investment casting?

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What are carbides?

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In welding, arc is too long due to ?

0 Answers   NIC,

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Why is non-destructive testing necessary?

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How gold can be separated from mercury?

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what is the different between ferrite percentage and ferrite number?

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Why same casting has different hardness and machineability properties? One spot it is found hard for machining and another spot soft? It is FG 260 grade for Cast Iron.

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Which of different types of cast irons is stronger? Is their strength superior to steels?

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Define what kind of cleaning substance or treatments keep or help prevent cast iron from rusting?

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sir please send me previous question papers on metallurgy at vishal.nitrr07@gmail.com .....thank you

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Which liquid would oyu use to dissolve gold?

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