Question

When would dross and slag tend to float on the metal surface?

(a) When pouring basins are doubled

(b) When pouring basins are made large

(c) When pouring basins are made small

(d) When pouring basins are removed

Answer 1

Correct choice is (b) When pouring basins are made large

Explanation: The metal could be stopped from entering the sprue, and would cause the dross and slag to float on the metal surface, when the pouring basins are made large.