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Defects like diagonal cracks and blow holes can be induced in the casting by the oscillation of mould.

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in Casting-Forming-Welding I by (687k points)
Defects like diagonal cracks and blow holes can be induced in the casting by the oscillation of mould.

(a) True

(b) False

This question was addressed to me during an online interview.

This key question is from Continuous Casting in chapter Special Casting Techniques of Casting-Forming-Welding I

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Best answer
Correct choice is (b) False

Best explanation: Mould oscillation leads to a generation of shape defects of the casting. But the internal defects like blow holes, diagonal cracks or any kind of cracks are originated in the cast product due to the mechanical and thermal stresses which are caused by the non-uniform cooling of casting in the secondary zone.

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