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Aluminium alloys are not susceptible to which of the following?

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in Casting-Forming-Welding II by (119k points)
Aluminium alloys are not susceptible to which of the following?

(a) Macro shrinkage

(b) Drossing

(c) Micro shrinkage

(d) Solidification shrinkage

This question was posed to me in an interview.

Question is taken from Aluminium and Its Alloys topic in chapter Foundry Introduction & Materials of Casting-Forming-Welding II

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Best answer
Correct answer is (a) Macro shrinkage

The best explanation: Aluminium alloys are susceptible to drossing, micro shrinkages and solidification shrinkages, but not to macro shrinkages. For the prevention of entering of dross in mold cavity, gating system is installed.

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