Question

An open riser is easy to mould as compared to a blind riser.

(a) True

(b) False

I have been asked this question in examination.

My question is taken from Types of Risers in division Concept of Gating and Risering of Foundry and Forging

Answer 1

The correct answer is (a) True

To explain I would say: An open riser is open to atmosphere, thus it ensures that unlike a blind riser it will not draw metal from the casting as a result of partial vacuum in the riser. Hence, it is easier to mould compared to a blind riser.