Question

A large size of riser should be placed on the casting system to compensate the solid shrinkage of the casting.

(a) True

(b) False

The question was posed to me by my college director while I was bunking the class.

I need to ask this question from Riser Placement in division Cooling and Solidification of Casting-Forming-Welding I

Answer 1

Right choice is (b) False

To explain I would say: In the solid shrinkage of the casting, casting cannot take any molten metal from the riser, as the casting is almost solidified. So, riser has no application for the solid shrinkage of the casting. To compensate the solid shrinkage, pattern of large size is placed in the mould which called a pattern with shrinkage allowance.