In light alloys, metal – mold reaction can be suppressed by adding Helium.(a) True(b) FalseI have been asked this question at a job interview.I'd like to ask this question from Mold-Metal Reaction in portion Mold and Mold Making of Casting-Forming-Welding I

In light alloys, metal – mold reaction can be suppressed by adding H

1.	In light alloys, metal – mold reaction can be suppressed by adding Helium.(a) True(b) FalseI have been asked this question at a job interview.I'd like to ask this question from Mold-Metal Reaction in portion Mold and Mold Making of Casting-Forming-Welding I
Answer» The CORRECT choice is (B) False The explanation is: In LIGHT alloy, metal – bond reaction can be suppressed, but not by using Helium, but by using Boric acid and ammonium bi-fluoride.

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