Question

Friability and crumbling are the properties which help in removing the core material from the solidified casting.

(a) True

(b) False

The question was posed to me in final exam.

Enquiry is from Forces Acting on Cores and Mold topic in section Mold and Mold Making of Casting-Forming-Welding I

Answer 1

The correct choice is (a) True

For explanation I would say: Friability and crumbling are the properties of the core material which helps in breaking and removing of core from the solidified casting part. So, these two properties are important in breaking of cores. Removal of the cores becomes easier when the friability and crumbling properties of the core sand is better.