Which statement best describes the up slope in GTAW controls?

• A. It maintains a fixed current throughout welding
• B. It initiates current at a lower amperage than the welding current
• C. It decreases current after welding
• D. It controls shielding gas flow

Answer: (B)

Up slope is about how the arc current is started. It gradually raises the current from a smaller ignition level up to the final welding current. This smooth ramp helps the arc ignite cleanly, reduces the chance of a rough start or crater formation, and gives you better control as the weld begins. It’s not about holding a fixed current throughout (that would be a constant-current mode), not about lowering the current after welding (that would be a ramp-down), and not about shielding gas flow (gas is controlled separately). The defining idea is starting at a lower amperage and increasing to the welding current.