Question

Which of the following factors is used to define the casting type in riser design?

(a) Plating factor

(b) Ranginess factor

(c) Caine factor

(d) Pseudo factor

I got this question during an interview.

The above asked question is from Riser Design in portion Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I

Answer 1

Correct choice is (b) Ranginess factor

To explain I would say: For the chunky type castings like a cube, the volume component can be neglected, but for the rangy castings, like as plate-like casting, the influence of the volume part becomes increasingly significant. So, it is very useful to have a parameter called ranginess factor (R), to define the casting type.