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  1. The sand used for making cores is

    2. A.

     Green sand
    B.

     Dry sand
    C.

     Loam sand
    D.

     Oil sand

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    Answer : Option D

    Explanation :

    It is used for making cores and sometimes called oil sand.
    This is silica sand mixed with core oil composed of linseed oil, resin, light mineral oil and other binding materials.

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