1.

Which of the following is not refractory sand?(a) Olivine(b) Silica Sand(c) Dolomite(d) Barium Chloride

Answer» Correct option is (d) Barium Chloride

To explain I would say: Among the following, Barium Chloride is not refractory sand, as it is counted under foundry fluxes, whereas all remaining sands are refractory sands.


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