Crossing in Foundry Practice Is

Multiple Choice

Crossing in foundry practice is

A) A means for checking the strength of cores
B) A defect in casting that can be removed by heating in a furnace and cooling at show rate.
C) The process of addition of chemicals to the molten metal to improve its fluidity
D) The process of formation of oxides on the surface of the molten metal
E) The process of forcing metal uniformly into the mould