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Shrinkage cavities are compensated by ___________

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in Casting-Forming-Welding I by (687k points)
Shrinkage cavities are compensated by ___________

(a) Providing proper chill techniques to the casting

(b) Providing proper feeding of liquid to the casting

(c) Using specific risers

(d) Using proper ramming during solidification

I got this question in an interview for job.

My question comes from Classification of Defects & Factors Affecting Salvage of Castings in division Salvage of Defective Castings of Casting-Forming-Welding I

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Correct choice is (b) Providing proper feeding of liquid to the casting

Easy explanation: Shrinkage cavities are formed due to volume decreasing phenomena while solidification of liquids. Proper liquid metal feed is given to reduce the effect of shrinkage.

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