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Phenolic resin and fine dry silica are mixed with ________ for shell mold casting.

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Phenolic resin and fine dry silica are mixed with ________ for shell mold casting.

(a) Warm water

(b) Cold water

(c) Mercury

(d) Alcohol

I had been asked this question at a job interview.

My query is from Casting Processes in division Testing of Materials, Foundry & Powder Metallurgy of Engineering Material & Metallurgy

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The correct option is (d) Alcohol

Explanation: The mold material of shell mold casting contains 5-10% phenolic resin mixed with fine dry silica. These are mixed with either dry oil or in the presence of alcohol. This pattern is heated to about 230-600^oC.

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