1.

The transfer of heat across a gap (an interface between mould and casting) is given by_____(a) q = h+∆T(b) q = h/∆T(c) q = h*∆T(d) q = h-∆TI have been asked this question in exam.I need to ask this question from Rate of Solidification topic in portion Cooling and Solidification of Casting-Forming-Welding I

Answer»

Correct ANSWER is (c) Q = h*∆T

Explanation: The transfer of heat across a gap (an interface between mould and casting) is given by q = h*∆T, where q is the heat FLUX, h is the heat transfer coefficient of the interface and ∆T is the TEMPERATURE difference between the source and the sink. Values of the heat transfer coefficient may vary from 10 to 102 for large air gap; 103 to 104 for normal castings.



Discussion

No Comment Found

Related InterviewSolutions