What is the major cause of lack of fusion in all welding processes involving carbon steel?

exams API-577 API-577 exam 0 Comments

What is the major cause of lack of fusion in all welding processes involving carbon steel?
A . Inadequate preheat
B . Improper welding speed
C . Improper heat input and improper welding technique
D . Not using a low hydrogen electrode or improper shielding

Answer: C