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Which of the following metal-mould interfaces show the divergent nature of heat flow from the casting material?(a) Concave(b) Square plane(c) Rectangular plane(d) ConvexThis question was addressed to me in semester exam.I would like to ask this question from Solidification of a Large Casting in an Insulating Mould in chapter Cooling and Solidification of Casting-Forming-Welding I

Answer»

Right choice is (d) Convex

The explanation is: During the solidification of casting in an INSULATING MOULD, the divergent nature of heat flow is shown by the convex type of metal-mould interface and the convergent nature is shown by the concave type interface. And PLANE interface reveals the straight and parallel nature of heat flow. The nature of heat flow in all THREE INTERFACES is shown in below figure.



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