Solidification time of a metallic alloy casting is

Inversely proportional to the thermal diffusivity of the mould material

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Inversely proportional to the pouring temp

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Directly proportional to its surface area

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Inversely proportional to the specific heat of the case material

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Solution

The correct option is A Inversely proportional to the thermal diffusivity of the mould material
Thermal diffusivity:

$α = \frac{k}{ρ C_{p}}$

Solidification time increases with decrease in thermal conductivity.

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