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 sandI had been asked this question during a job interview.My question is from Pattern Design topic in chapter Pattern and Pattern Making of Casting-Forming-Welding I

Rat tails and buckles in sand casting are caused by __________(a) Lowe

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 sandI had been asked this question during a job interview.My question is from Pattern Design topic in chapter Pattern and Pattern Making of Casting-Forming-Welding I
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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