Shrinkage allowance on pattern is provided to compensate for shrinkage when
A
the temperature of liquid metal drops from pouring to freezing temp
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B
the temperature of solid phase drops from freezing to room temperature
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C
the temp of metal drops from pouring to room temperature
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D
the metal changes from liquid to solid state at freezing temperature
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Solution
The correct option is B the temperature of solid phase drops from freezing to room temperature Shrinkage allowance is provided to compensate for shrinkage when the temperature of the solid phase drops from freezing to room temperature.