Question

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

(a) True

(b) False

The 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 1

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.