Sharp internal corner of the casting also causes the misrun defect in the casting.(a) True(b) FalseThe question was posed to me at a job interview.I want to ask this question from Pattern Fillets in chapter Pattern and Pattern Making of Casting-Forming-Welding I

Sharp internal corner of the casting also causes the misrun defect in

1.	Sharp internal corner of the casting also causes the misrun defect in the casting.(a) True(b) FalseThe question was posed to me at a job interview.I want to ask this question from Pattern Fillets in chapter Pattern and Pattern Making of Casting-Forming-Welding I
Answer» The correct answer is (B) False To explain: Sharp external corners can also produce CASTING defects. A misrun defect is basically caused by sharp external corners of the casting. External corners abruptly LOSE heat to the surrounding mould material and as a result, the corner might not fill COMPLETELY that result into a misrun defect.

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