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Mr. Dubey • 100.64K Points
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Q. Which of the following additives are added to the sand in Co2 moulding for the improvement in collapsibility of the sand?

  • (A) copper oxide
  • (B) wood flour
  • (C) aluminium oxide
  • (D) oil
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Explanation by: Mr. Dubey
after the preparation of the sand mixture by adding sodium silicate to the

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