Back pressure porosity can be avoided by________?

4460MedicalMedium

APreventing rapid heating the investment in burnout oven

BPlacing the sprue at least one quarter inch away form the end of casting ring

CUsing asbestos linear

DUsing a short and wide sprue

Correct answer

B. Placing the sprue at least one quarter inch away form the end of casting ring

Explanation

The correct answer is Placing the sprue at least one quarter inch away form the end of casting ring.

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