Which consequence results when the 'lost-wax' casting mold fails during the casting of the ancient Chinese iron cannon?

💡 Explanation

Premature solidification within narrow sprue channels occurs, blocking the flow. This is due to reduced fluid flow (momentum transfer) because heat loss to the compromised mold is too rapid; therefore, the cannon is incomplete, rather than oxidizing/porous, as oxidation/porosity come from prolonged exposure to molten metals/degassing.

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