Question

Which of the following methods is more convenient for the removal of very large size gates and risers from the steel castings?

(a) Hammering

(b) Chipping

(c) Flame or arc cutting

(d) Hack sawing

This question was addressed to me at a job interview.

My doubt stems from Casting Cleaning topic in portion Pouring – Gating Design, Melting Furnaces, Melting and Casting Quality of Casting-Forming-Welding I

Answer 1

The correct answer is:

(c) Flame or arc cutting

Explanation: For the removal of very large gates and risers from steel castings, flame or arc cutting is the most efficient and convenient method. This method involves using high-temperature flames (often from an oxy-acetylene torch or arc cutting equipment) to melt and separate the large portions of metal, making it much faster and more effective than other methods like hammering, chipping, or hacksawing, which are more suitable for smaller or less tough materials. Flame or arc cutting helps reduce the physical labor involved and minimizes the risk of damaging the casting during the cleaning process.