Multiple Choice Question (MCQ)
Question: What are the gases mixed for shielding in FCAW?
A.
Argon and O<sub>2</sub>
B.
Argon and CO<sub>2</sub>
C.
Helium and CO<sub>2</sub>
D.
Argon and helium
Correct Answer: Argon and CO<sub>2</sub>