Discussion
What is the function of a gas regulator during a gas welding operation?
Answer: D
A gas regulator is used to set the working pressure.
Gas cylinders store oxygen at very high pressure. The regulator reduces this cylinder pressure to a steady, much lower working pressure suited to the torch and keeps it constant as the cylinder empties.
Mixing the gases in the right proportion happens in the blowpipe (torch). The type of flame is adjusted with the torch valves, which also control the volume of gas flowing; the regulator's job is the pressure.
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