CO₂ sand is used A)for low temperature alloys B)for non-ferrous castings C)Parting off D)for producing hard surface around the mould E)for mass production of castings

Name: CO 2 sand is used A)for low temperature alloys B)for non-ferrous castings C)Parting off D)for producing hard surface around the mould E)for mass production of castings
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Question

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CO2 sand is used for producing a hard surface around the mould by reacting with sodium silicate to form a solid silica gel, which strengthens the mould.

CO2 Sand Is Used

CO₂ Sand Is Used