Flowmeters measure shielding gas flow rates in _____.

Flowmeters are essential tools in welding, particularly in processes that require shielding gas to protect the weld pool from atmospheric contamination. These devices measure the flow rates of shielding gas, which is critical for ensuring proper gas coverage during welding operations.

Cubic feet per hour and liters per minute are appropriate units of measurement for gas flow because they effectively describe the volume of gas moving through a given point over time. These units are directly relevant to the requirements for effective gas flow in welding applications, as they provide a clear understanding of how much gas is available to shield the weld. Too little gas can lead to oxidation and impurities in the weld, while too much can lead to turbulence and an unstable arc.

The other unit selections, while they measure different metrics, don't align closely with the specific needs of gas flow in welding processes. Gallons and square foot measurements are not suitable for capturing gas flow rates relevant to welding applications. Hence, cubic feet per hour and liters per minute are definitive choices for ensuring that sufficient shielding gas is provided throughout the welding task.