Explanation: TIG welding requires a Constant Current (CC) power source. In a CC source, the current remains relatively stable even if the arc length (voltage) fluctuates slightly due to the welder's hand movement. If a Constant Voltage source were used, a slight change in arc length would cause massive changes in current, making manual welding nearly impossible.
A welder complains that he gets porosity at the start of every GMAW weld. What are your likely causes? A: cswip 3.1 technology questions and answers
The CSWIP 3.1 (Certification Scheme for Welding and Inspection Personnel) is the gold standard for welding inspectors worldwide, particularly in the oil, gas, construction, and structural steel industries. Passing the 3.1 examination is notoriously challenging. It requires not only practical inspection knowledge but also a deep grasp of welding technology —from heat inputs and preheat calculations to weld defects and NDT methods. Explanation: TIG welding requires a Constant Current (CC)
Thickness is crucial. The rule of thumb: Thicker plate + high CE = higher preheat. A welder complains that he gets porosity at