GATE ME 2018 Set 2 — Question 23

MCQ+1 / -0.33EasySolidification & Chvorinov's RuleCastingManufacturing Processes

Manufacturing Processes → Casting → Solidification & Chvorinov's Rule

Last updated 5 September 2026

Question

During solidification of a pure molten metal, the grains in the casting near the mould wall are

Correct answer (B) fine and randomly oriented Solution During the solidification of a pure molten metal, the mould wall acts as a heat sink, causing a very high cooling rate at the surface. This rapid cooling leads to a high rate of nucleation, resulting in the formation of a large number of small grains. These grains are known as the chill zone and are characterized as being fine and randomly oriented . Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (B) fine and randomly oriented Solution During the solidification of a pure molten metal, the mould wall acts as a heat sink, causing a very high cooling rate at the surface. This rapid cooling leads to a high rate of nucleation, resulting in the formation of a large number of small grains. These grains are known as the chill zone and are characterized as being fine and randomly oriented .

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