Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting) ?
Correct answer: D. V2/A2
- A. V/A
- B. V/A2
- C. V2/A
- D. V2/A2
Explanation
Chvorinov's rule gives solidification time as t = C(V/A)^n, with n commonly taken as 2. Hence the time is proportional to V²/A², so larger volume and smaller surface area slow cooling.
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