According to the ANSI/ASNT CP-189 standards, how are Level I Practical examinations intended to be administered?

The correct answer reflects that Level I Practical examinations should involve the use of one or more test samples for each technique being evaluated. This approach ensures that candidates get a comprehensive and hands-on understanding of the techniques they are being assessed on. Utilizing multiple samples allows for a better demonstration of skills, as different samples can present varied challenges and scenarios.

This hands-on application is critical for Level I examinations, as it aligns with the intent of practical assessments to accurately gauge a candidate's ability to apply theoretical knowledge in real-world situations. The emphasis on different test samples supports the goal of real-world applicability and skill verification in accordance with the ANSI/ASNT CP-189 standards.