API-577 practice question 14 of 25

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

Full set: 110 questions
Answer options
A: Inadequate preheat
B: Improper welding speed
C: Improper heat input and improper welding technique Correct answer
D: Not using a low hydrogen electrode or improper shielding
Correct Answer:
C. Improper heat input and improper welding technique
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