Proficiency shall be demonstrated in selecting and performing the applicable NDE technique within the method and interpreting and evaluating the results on two or more specimens or machine problems approved by the NDE Level III. At least ten (10) different checkpoints requiring an understanding of NDE variables and the Kelvion’s procedural requirements shall be included in this practical examination. The candidate shall detect 80% discontinuities and conditions specified by the NDT Level III. When required by the NDE Level III, detecting rate as well as the maximum numbers of false call that are acceptable shall be no more than 20%.Note: Practical examinations shall contain checkpoints that failure to successfully complete will result in failure of the examination.