Final answer:
High-frequency intensity controls in the GTA Welding process provide better arc stability, which is crucial for creating high-quality welds. Therefore correct answer is option C.
Step-by-step explanation:
The advanced features associated with the Gas Tungsten Arc Welding (GTAW), or GTA Welding process, include high-frequency intensity controls that provide better arc stability. High-frequency intensity controls allow the welder to maintain a consistent welding arc, which in turn results in higher-quality welds. Arc stability is crucial for producing welds that have fewer defects and that are structurally sound.
In terms of matter penetration, gamma rays penetrate matter more deeply than alpha particles. Alpha particles can be stopped by a sheet of paper or even the outer layer of human skin, whereas gamma rays require denser materials like lead or concrete for shielding. To protect against alpha particle emission, one can use barriers such as protective clothing or stand at a safe distance. Gamma rays, because of their high penetration power, require more heavy-duty shielding such as lead aprons or the use of remote handling tools in environments with high levels of gamma radiation.