Rough surface of casting may result from
A)high permeability of sand
B)large grain size
C)soft ramming
D)any of the above

Question

Quizplus · Accepted Answer

Rough surface of casting can result from high permeability of sand, large grain size, or soft ramming. Each of these factors can affect the surface finish of the casting by allowing gases to escape too easily, creating a coarser mold surface, or not compacting the sand tightly enough, respectively.

Rough Surface of Casting May Result from