Draft is generally provided to make a clearance between the pattern

draft-is-generally-provided-to-make-a-clearance-between-the-pattern

Draft is generally provided to make a clearance between the pattern and the mould during pattern extraction.

A. True

B. False

This question was posed to me during a job interview.

This interesting question is from Pattern Fillets topic in section Pattern and Pattern Making of Casting-Forming-Welding I

The correct option is A. True

The best explanation: Draft angles are normally included into the pattern design to make easy extraction of a pattern from the mould cavity. Draft angles are used in most of the pro¬cesses in which a pattern is withdrawn from the mould prior to pouring. Draft is very necessary to provide a clearance between the pattern and the mould during pattern extraction.