Question

Which of the following cannot be a way of spreading dust?

(a) Enclosing the mixer

(b) Screening the sand

(c) Moistening the sand

(d) Treating the cast chemically

This question was posed to me in semester exam.

My question comes from Dust Control and Dust Extraction in Foundry in division Foundry Environment Health & Dust Problem in Foundries of Casting-Forming-Welding I

Answer 1

The correct choice is (d) Treating the cast chemically

To explain I would say: For the prevention of spreading the dust, moistening and screening the sand can be options. By enclosing the mixer too sand spreading can be avoided. But by treating the cast chemically, its physical, chemical, as well as mechanical properties may change.