The amperage on a machine and the actual welding current are necessarily the same.

• A. FALSE
• B. TRUE
• C. Sometimes they differ
• D. Always

Answer: (A)

The amperage you set on the welding machine is the target current the machine tries to deliver, but the actual current at the arc is not guaranteed to match that value exactly. In practice, several factors can cause a difference: resistance and voltage drop in cables, clamps, and connections reduce what reaches the arc; the arc length and shielding gas conditions can force the power source to adjust voltage to maintain the current, and real-world equipment has calibration tolerances. Because of these variables, the current you observe at the weld may be a bit higher or lower than the dial setting, so they are not necessarily the same.