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What is the amount of sea coal needed in cast irons for large green casting moulding sands?(a) 10%(b) 15%(c) 20%(d) 25%I had been asked this question in unit test.My question is based upon Bonding Theory in chapter Molding and Core Sands of Casting-Forming-Welding I |
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Answer» Right option is (a) 10% |
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