Final answer:
The correct flow rate of shielding gas for MIG welding steel is usually 15-20 cubic feet per hour, providing adequate protection without causing turbulence.
Step-by-step explanation:
The flow rate of shielding gas while MIG welding steel should generally be in the range of 15-20 cubic feet per hour (CFH). This flow rate ensures that there is enough gas to protect the weld pool from atmospheric contamination without causing excessive turbulence that could introduce air into the weld. It is important to adjust the flow rate based on specific welding conditions such as the size of the weld, the type of metal being welded, and the welding position.