NDT Level III Personnel Qualification Certification for PT - Liquid Penetrant Testing Outline
About Liquid Penetrant Testing (PT)
The basic principle of liquid penetrant testing is that when a very low viscosity (highly fluid) liquid (the penetrant) is applied to the surface of a part, it will penetrate into fissures and voids open to the surface. Once the excess penetrant is removed, the penetrant trapped in those voids will flow back out, creating an indication.
This examination is 2 hours in length, having 90 questions of equal value.
- Principles of liquid penetrant process
- Proper selection of PT as method of choice
- Liquid penetrant processing
- Liquid penetrant test units
- Methods of measurement
- Lighting for liquid penetrant testing
- Materials for liquid penetrant testing
- Testing and maintenance of materials
- Factor affecting indications
- Indications from discontinuities
- Relevant and Nonrelevant indications
- Liquid penetrant testing procedures, codes, standards and specifications
- Safety and Health
- Electrical hazards
- Personnel protective equipment
- Right to know (MSDS)
- Disposal of used materials
The number in parentheses following each reference is the ASNT catalog number.
- Level III Study Guide: Liquid Penetrant Testing (2255)
- NDT Handbook: Volume 2, Liquid Penetrant Tests (142, 142CD, 142WCD)
- Supplement to Recommended Practice No. SNT-TC-1A (Q&A Book) - Liquid Penetrant Testing Method, Revised Edition (2029)
ASNT offers a PT Refresher Course based on the above topical outline.