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In clay content determination of molding sand, which is the base solution used?(a) KOH(b) NaOH(c) Mg(OH)2(d) Ca(OH)2I got this question in an interview for job.This intriguing question originated from Testing of Molding Sand topic in division Sand Preparation of Casting-Forming-Welding I

Answer»

The correct choice is (B) NaOH

For explanation: For KNOWING the exact details of the compositions present in the SAND, various tests have to be performed. In clay CONTENT determination of the molding sand, 3% sodium hydroxide (NaOH) is used.



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