Question

Which of the following parts is provided in between the mould and casing to reduce the vibrations?

(a) Steel balls

(b) Metallic roller

(c) Viscous fluid

(d) Grease

I had been asked this question by my school principal while I was bunking the class.

This question is from Centrifugal Casting in section Special Casting Techniques of Casting-Forming-Welding I

Answer 1

Right choice is (b) Metallic roller

Explanation: After the completion of the mould, the flask is balanced dynamically so as to reduce the occurrence of undesirable vibrations during the casting process. And the metallic rollers are used in between the rotating mould and the stationary casing to avoid the jerks and for the damping of vibrations.