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The dried plaster mould have __________

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in Casting-Forming-Welding I by (687k points)
The dried plaster mould have __________

(a) Low permeability

(b) High permeability

(c) Moderate permeability

(d) Same amount of permeability as other moulds

This question was posed to me during an online interview.

This intriguing question originated from Molding Processes in section Mold and Mold Making of Casting-Forming-Welding I

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Best answer
The correct answer is (a) Low permeability

The best I can explain: The dried plaster moulds have extremely low permeability, about- 1 to 2 AFS.

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