Question

Subsequent machining for products finishing does not require extra material to the metal casting, as it removes negligible amount of material from the casting.

(a) True

(b) False

I got this question during an interview.

My enquiry is from Finishing Patterns & Storing of Patterns topic in section Pattern and Pattern Making of Casting-Forming-Welding I

Answer 1

Correct option is (b) False

The best I can explain: It is very necessary to include extra material to the metal casting to compensate it for subsequent machining which removes very fine particles to vanish roughness and to make casting smooth and aesthetically pleasant. Then the casting becomes ready for industrial application.