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A reduced metal section at the casting joint makes easy removal of gates and risers from the castings.

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in Casting-Forming-Welding I by (687k points)
A reduced metal section at the casting joint makes easy removal of gates and risers from the castings.

(a) True

(b) False

I had been asked this question in an internship interview.

Question is from Casting Cleaning in chapter Pouring – Gating Design, Melting Furnaces, Melting and Casting Quality of Casting-Forming-Welding I

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Correct option is (a) True

The explanation is: Removal of gates and risers can be simplified by providing a reduced metal section at the casting joint, so for brittle materials such as grey cast iron, the gates can easily be broken by hitting with a hammer. The gates and risers can be removed by hammering, chipping, hack sawing, abrasive cutoff etc.

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