NDT Certification > What Is SNT-TC-1A?
Recommended Practice No. SNT-TC-1A: Personnel Qualification and Certification in Nondestructive Testing is an employer based certification program that is recommended by the American Society for Nondestructive Testing. The recommended guidelines were established in hopes to create consistency and accuracy in the way nondestructive testing is performed through out the industry.
This popular certification program provides a company with guidelines for training its employees and documenting their progress as they advance in their NDT career. In most cases, when following the SNT-TC-1A framework, NDT companies can feel confident that their employees are capable and qualified to earn certifications.
Each NDT method requires its own certification. The method's degree of difficulty directly influence the certification requirements. Technicians can earn different levels of certification in each method. This standard covers certification in liquid penetrant testing (PT), magnetic particle testing (MT), eddy current testing (ET), ultrasonic testing (UT), and radiography testing (RT).
Popular Training Requirement Outlined in the SNT-TC-1A
• Organized/Structured Training
This is a structured training program that teaches the principles, theories and applications of a NDT method. Traditionally, this training is a lecturing style program in a classroom setting.
• Hands on Training/Experience - As it relates to Hours and Months
On the job training with the guidance and supervision of a certified level II or III nondestructive testing technician.
• General Exam
This comprehensive written exam, when taken and passed, is an indicator and measurement of a trainee or technician's understanding of the principles and theories of a a particular ndt method. According to the SNT-TC-1A standards this exam should be a minimum of 40 question. One should score at least a 70% to pass the general exam. However, when combining the scores of both the general and specific exam the trainee or technician should score a minimum of 80%.
• Specific Exam
This comprehensive written exam, when taken and passed, would be an indicator and measurement of a trainee or technician's ability to research and perform a particular test application when referring to a specific procedures involving proper equipment calibrations, materials preparation and applying proper testing techniques. It is recommended to have a minimum of 20 questions on the specific exam. One should score at least a 70% to pass the specific exam. However, when combining the scores of both the general and specific exam the trainee or technician should score a minimum of 80%.
• Practical Exam
This hands on exam is a physical demonstration of a trainee or technician's ability to actually perform a particular method on a particular material by calibrating equipment, preparing the test object, using proper testing techniques, identifying discontinuities and documenting results.
• Vision Test
Trainees or technicians must pass a vision and color vision test. Near vision acuity and the ability to distinguish colors and shades of gray are required to identifying discontinuities and interpret ndt test results.