If mercury is used as a pattern material in place of wax, then for the preparation of mould, mercury is kept at temperature_____(a) below -38 ⁰C(b) 0 ⁰C(c) 0 to 38 ⁰C(d) -38 to 0 ⁰CThe question was posed to me in exam.I would like to ask this question from Precision Investment Casting in chapter Special Casting Techniques of Casting-Forming-Welding I

If mercury is used as a pattern material in place of wax, then for the

1.	If mercury is used as a pattern material in place of wax, then for the preparation of mould, mercury is kept at temperature_____(a) below -38 ⁰C(b) 0 ⁰C(c) 0 to 38 ⁰C(d) -38 to 0 ⁰CThe question was posed to me in exam.I would like to ask this question from Precision Investment Casting in chapter Special Casting Techniques of Casting-Forming-Welding I
Answer» The correct answer is (a) below -38 ⁰C To explain I would say: If MERCURY is used as a pattern material in place of wax, then the process is known as MERCAST, the mercury is kept under -57 ⁰C where the mercury is frozen. And the complete mould preparation is to be UNDERTAKEN at a TEMPERATURE below -38 ⁰C to keep the mercury in solid state.

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