1.

Rat tails and buckles in sand casting are caused by __________(a) Lower strength of the solidified metal(b) Lower refractoriness of the moulding sand(c) Lower strength of the moulding sand(d) Lower hardness of the moulding sand

Answer» The correct choice is (c) Lower strength of the moulding sand

Explanation: Lower strength of the moulding sand causes rat tails and buckles type of defect in manufacturing of casting.


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