Which of the following is a metallurgical defect?
(a) Hotspots
(b) Shrinkage cavities
(c) Slag inclusions
(d) Metal penetration
I have been asked this question in exam.
I want to ask this question from Classification of Defects & Factors Affecting Salvage of Castings in division Salvage of Defective Castings of Casting-Forming-Welding I