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The baking process in plaster moulding process induces which of the following defects?(a) It depletes down the content of water at a very scarce level(b) It develops microscopic cracks onto the surface of mould(c) It gives the surface improper heat that causes differential heat treatment while casting solidification(d) The Calcium reacts at elevated temperatures used for baking the mould |
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Answer» Correct choice is (b) It develops microscopic cracks onto the surface of mould Best explanation: The baking of mould in plaster moulding process causes the development of microscopic cracks, which results in improper surface of casting. |
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