Question

____________ force is responsible for cleaning in mechanical blast method.

(a) Gravitation force

(b) Tensile force

(c) Centrifugal force

(d) Shear force

I have been asked this question in a national level competition.

I want to ask this question from Fettling and Cleaning of Castings topic in chapter Concept of Gating and Risering of Foundry and Forging

Answer 1

The correct option is (c) Centrifugal force

To explain: The centrifugal force aid in issuing a stream of abrasive particles which impinges on castings being trumbled on an apron conveyor. Due to this high speed action of the centrifugal impellers, the particles are cleaned.