GATE ME 2019 Set 2 — Question 25

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

Manufacturing Processes → Casting → Solidification & Chvorinov's Rule

Last updated 5 September 2026

Question

The fluidity of molten metal of cast alloys (without any addition of fluxes) increases with increase in

Correct answer (D) degree of superheat Solution Fluidity is the ability of molten metal to flow and fill the mold cavity. Degree of superheat : Increasing the pouring temperature above the liquidus temperature (superheat) reduces viscosity and increases the time available for flow before solidification begins, thus increasing fluidity. Viscosity and Surface Tension : Increasing these properties hinders flow, thereby decreasing fluidity. Freezing range : A wider freezing range (difference between liquidus and solidus temperatures) typically leads to a mushy zone that obstructs flow, decreasing fluidity. Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (D) degree of superheat Solution Fluidity is the ability of molten metal to flow and fill the mold cavity. Degree of superheat : Increasing the pouring temperature above the liquidus temperature (superheat) reduces viscosity and increases the time available for flow before solidification begins, thus increasing fluidity. Viscosity and Surface Tension : Increasing these properties hinders flow, thereby decreasing fluidity. Freezing range : A wider freezing range (difference between liquidus and solidus temperatures) typically leads to a mushy zone that obstructs flow, decreasing fluidity.

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