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Shrinkage allowance on pattern is provided to compensate for shrinkage when

A. The temperature of liquid metal drops from pouring to freezing temperature

B. The metal changes from liquid to solid state at freezing temperature

C. The temperature of solid phase drops from freezing to room temperature

D. The temperature of metal drops from pouring to room temperature

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  15. High speed steel cutting tools operate at cutting speeds _________ than carbon steel tools.
  16. The addition of lead, sulphur and phosphorus to low carbon steels, help to
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