How do water and carbon dioxide relate to combustion?
A) Carbon dioxide is a product of combustion, not water.
B) Water is a product of combustion, not carbon dioxide.
C) Both are stable and safe products of combustion.
D) Both are unstable, dangerous products of combustion.
Question 2
GMAW normally uses:
A) DCEP B) DCEN
C) AC D) AC - High Frequency
