How many hours of supervised work are required for each NDI technician for penetrant method?

The correct choice is based on the established guidelines set forth for training and certification of Non-Destructive Inspection (NDI) technicians, specifically regarding the penetrant method. For NDI technicians specializing in this technique, the requirement is to complete 16 hours of supervised work. This amount of time is important because it ensures that the technician gains adequate hands-on experience and training under the supervision of a qualified individual. This supervised practice is critical for mastering the penetrant method, which involves applying a liquid penetrameter to detect surface defects in materials.

This hands-on training period is designed to enhance the technician's proficiency in various aspects of the NDI process, such as application techniques, interpretation of results, and adherence to safety and procedural standards. The 16-hour requirement supports the foundation for a technician to develop the necessary skills to perform inspections accurately and effectively, contributing to overall safety and quality in aviation maintenance.