Top 20 Interview Questions & Answers for NDT Technician Roles – 2025

Preparing for an NDT technician job interview? This guide provides a list of essential questions and answers that will help you showcase your technical expertise, attention to detail, and experience working with various non-destructive testing methods. Whether you’re applying for a role in the aerospace, oil and gas, or construction industry, these questions cover all key areas of the job.

General Questions

• 1. Can you tell us about your experience in performing non-destructive testing?
  As an NDT technician, I have over 5 years of experience working with a wide range of methods such as ultrasonic testing, magnetic particle testing, and radiography. I have also received training and certifications in these methods from reputable organizations.
• 2. What motivated you to pursue a career in NDT?
  I have always been interested in technology and how it can be used to ensure the safety and quality of structures and components. NDT caught my attention because it allows for thorough testing without causing any damage to the materials being inspected.
• 3. How do you stay updated with the latest NDT techniques and equipment?
  I regularly attend conferences and workshops to learn about new techniques and equipment. I also make sure to read industry publications and participate in online forums to stay updated.
• 4. Can you explain the importance of following safety protocols in NDT?
  Following safety protocols is crucial in NDT because it involves working with hazardous materials and equipment. By following protocols, we can ensure the safety of ourselves, our colleagues, and the environment.
• 5. How do you handle quality control in your NDT work?
  Quality control is a crucial aspect of NDT work, and I handle it by following industry standards and procedures strictly. I also make sure to double-check my work and document any findings or discrepancies.

Technical Skills & Experience

• 6. What is the main difference between ultrasonic testing and radiography?
  Ultrasonic testing uses sound waves to detect internal flaws while radiography uses X-rays to create an image of internal structures.
• 7. Have you ever faced a challenging NDT project? How did you handle it?
  Yes, I once worked on a project where the structure being tested was located in a cramped space with limited accessibility. I used specialized equipment and collaborated with my team to successfully complete the project.
• 8. Can you explain the process of liquid penetrant testing?
  Liquid penetrant testing involves applying a visible or fluorescent dye to the surface of a component and then using a developer to reveal any defects or cracks.
• 9. What are some common defects that can be detected through magnetic particle testing?
  Magnetic particle testing can detect defects such as cracks, seams, laps, and porosity in ferromagnetic materials.
• 10. How do you ensure the accuracy of your NDT inspections?
  To ensure accuracy, I make sure to calibrate my equipment regularly and follow established procedures. I also perform a second inspection or have a colleague review my work to catch any discrepancies.

Behavioral Questions

• 11. Can you tell us about a time when you identified a critical flaw through NDT testing?
  In one project, while conducting ultrasonic testing on a welded structure, I found a crack that could have caused serious safety implications if left undetected. I immediately reported it to my supervisor and we took the necessary steps to address the issue before it became a major problem.
• 12. How do you handle communication with clients and colleagues during an NDT project?
  I make sure to communicate clearly and regularly with clients and colleagues, providing updates and addressing any concerns or questions they may have. I also keep detailed records of any communication for future reference.
• 13. Have you ever faced a difficult situation with a colleague on a project? How did you handle it?
  Yes, I once had a disagreement with a colleague over a testing method. I calmly discussed my concerns with them and we ended up finding a solution that satisfied both of us.
• 14. Have you ever made a mistake during an NDT inspection? How did you handle it?
  Yes, I once made a mistake in recording my findings while performing a magnetic particle test. I immediately notified my supervisor and corrected the mistake. I also made sure to double-check my work moving forward.
• 15. Can you describe a time when you had to work under tight deadlines?
  In a previous job, I had to complete a large-scale NDT inspection on a tight deadline due to an unexpected rush order from a client. I managed my time effectively and collaborated closely with my team to complete the project on time without compromising the quality of work.

Situational Questions

• 16. What would you do if you found a discrepancy in your NDT findings that could have serious consequences?
  I would immediately report the discrepancy to my supervisor and provide evidence to support my findings. I would also collaborate with the necessary parties to address the issue and ensure its proper resolution.
• 17. How do you handle a situation where an NDT method you are not familiar with is requested by a client?
  I would first research and familiarize myself with the method and request training if necessary. If time does not permit for training, I would collaborate with a more experienced colleague to ensure the proper execution of the method.
• 18. What would you do if you found an issue during an NDT inspection but your supervisor instructed you to ignore it?
  I would calmly voice my concerns and provide evidence to support my findings. If my supervisor still insists on disregarding the issue, I would escalate the matter to a higher authority for resolution.
• 19. How do you prioritize your work when you have multiple NDT inspections to complete in a short timeframe?
  I would prioritize based on the urgency and complexity of each inspection, making sure to communicate any potential delays or issues with clients and colleagues. I would also effectively manage my time and resources to ensure timely completion of all tasks.
• 20. How do you handle a situation where an NDT method is not effective in detecting a defect?
  I would assess the situation and consult with my team to determine the best course of action. If necessary, I would recommend an alternative method or escalate the issue to a specialist for further evaluation.