AS ISO 20807:2020 pdf download.Non-destructive testing一Qualification of personnel for limited application of non-destructive testing.
6 Vision requirements
6.1 The candidate shall provide documented evidence of satisfactory vision in accordance with the following requirements:
a) near-vision acuity shall permit reading a minimum of Times Roman N4,5 or equivalent letters (Times New Roman of 4,5 points where 11 point = 1/72 inch or 0,352 8 mm) at not less than 30 cm with one or both eyes, either corrected or uncorrected;
b) colour vision shall be sufficient that the candidate can distinguish contrast between the colours used in the NDT method concerned as specified by the employer.
6.2 Subsequent to qualification, the tests of visual acuity shall be carried out annually and be verified by the employer.
7 Eligibility
7.1 Eligibility for examination
To he eligible for examination, the candidate shall provide evidence acceptable to the qualifying body or to the certification body, of completion of a course of NDT training appropriate to the scope of qualification sought.
NOTE 1 Training providers should issue documentary proof of completion of training.
NOTE 2 Information in Annex A may be used as guidance for the development of training and education syllabi, and duration of training.
7.2 Eligibility for the award of a certificate of qualification
7.2.1 The candidate shall have satisfactorily completed an appropriate written and practical examination.
7.2.2 The candidate shall have gained experience as required by the certification body, taking into account the guidance provided in A.1 to A.4.
7.2.3 The candidate shall provide documentary evidence of satisfactory vision in accordance with Clause 6.
8 Examinations
8.1 General
The qualification examination shall comprise a written examination and a practical examination. A guide to the construction of a written examination syllabus and practical tests to be carried out is given in Annex A.
8.2 Written examination
8.2.1 The written examination shall include an evaluation of the candidate’s understanding of the NDT application, as well as the theory of the NDT method. Questions shall be selected from the certification body’s or the qualifying body’s collection of questions valid on the date of examination. The candidate shall be required, as a minimum, to give answers to thirty questions, which may be multiple choice and/or short answer questions.AS ISO 20807 pdf download.