Question

Before starting of casting process, a dummy starter bar is used in the continuous casting method.

(a) True

(b) False

I have been asked this question in semester exam.

The above asked question is from Continuous Casting in section Special Casting Techniques of Casting-Forming-Welding I

Answer 1

Correct answer is (a) True

To elaborate: At initial, a dummy starter bar is kept in the mould bottom. After starting of a process, as the metal level rises to a desirable height then the starter bar is withdrawn from the system. The initial metal freezes onto the starter bar as well as the periphery of the mould, and then this solidified shell supports the liquid metal as it moves downwards.