17 NDT Inspector Interview Questions and Answers

Non-destructive testing, or NDT, is a vital process in many industries for quality control and assurance. NDT inspectors use a variety of methods to test materials, components, and systems for defects without causing damage.

If you’re an NDT inspector, you know that your skills are in high demand. But before you can start your new job, you’ll need to pass an interview. The questions you’re asked will vary depending on the company, but there are some common NDT interview questions that you can expect.

We’ve put together a list of sample NDT questions and answers that you can use to prepare for your next interview.

Are you familiar with the various nondestructive testing methods used in the industry?

The interviewer may ask you this question to see if you have experience with the various testing methods used in your industry. You can answer this question by listing the different types of NDT and explaining which ones you’re familiar with.

Example: “I am familiar with all of the major nondestructive testing methods, including ultrasonic testing, magnetic particle testing, liquid penetrant testing, radiographic testing, eddy current testing, fluorescent penetrant testing and x-ray testing. I’ve performed each of these tests during my career as an NDT inspector.”

What are the most important skills for an NDT inspector to have?

This question can help the interviewer determine if you have the skills necessary to succeed in this role. When answering, it can be helpful to mention a few of your strongest skills and how they relate to NDT inspection.

Example: “The most important skill for an NDT inspector is attention to detail. This skill helps me ensure that I am looking at all aspects of a piece of equipment or structure during testing. Another important skill is communication. During my inspections, I often work with other professionals who are responsible for different tasks. Having strong communication skills allows me to relay information clearly and efficiently so everyone understands what’s happening.”

How do you perform a visual inspection?

This question can help the interviewer understand your process for inspecting a structure. You can answer this question by describing how you use your senses to look at a surface and identify any defects or damage.

Example: “I start my visual inspection by looking at the entire surface of the object I’m inspecting. Then, I’ll move in closer to inspect specific areas that may be damaged. For example, if I’m inspecting an airplane wing, I’ll first look at the overall shape of the wing to make sure it’s symmetrical. Next, I’ll look at the color of the metal to see if there are any discolorations or signs of corrosion. Finally, I’ll get even closer to inspect the surface of the metal to look for pitting, dents or other defects.”

What is the most common type of industrial equipment you inspect?

This question can help the interviewer determine if your experience is relevant to their company. If you have previous experience inspecting equipment similar to what they use, share that information. If not, consider discussing a type of equipment that’s similar and how it relates to the job.

Example: “I’ve worked with many types of industrial equipment in my career, but I’m most experienced with pipelines and pressure vessels. In my last position, I inspected both pipeline systems for leaks and pressure vessels for cracks. These are two common pieces of equipment used in oil drilling operations, so I feel confident that I could perform these inspections effectively.”

Provide an example of a time you identified a structural weakness in equipment or a structure.

An interviewer may ask this question to learn more about your experience with NDT and how you apply it in the workplace. When answering, consider describing a time when you used your knowledge of NDT to identify a weakness or defect in equipment or a structure that could lead to failure.

Example: “In my last role as an NDT inspector, I was responsible for inspecting all aspects of a bridge before it opened to traffic. During my inspection, I noticed some minor defects in the steel beams that supported the bridge. After discussing these issues with my supervisor, we decided to replace two of the beams rather than repair them. This decision ensured the safety of drivers who used the bridge.”

If you discovered a problem during an inspection, how would you present your findings to the client?

Interviewers may ask this question to assess your communication skills and how you handle conflict. In your answer, try to show that you can be professional while also being honest about the situation.

Example: “If I found a problem during an inspection, I would first explain what it was and why it’s important for them to address it. If they’re not willing to fix it, I would let them know that I will report it in my final report and include any other issues I find with the equipment or structure. This way, they have time to make changes before the client receives the final report.”

What would you do if you were unable to complete an inspection due to equipment malfunction or other issues?

Employers ask this question to make sure you have the ability to problem-solve and adapt to challenging situations. In your answer, explain how you would assess the situation and find a solution that works for everyone involved.

Example: “If I was unable to complete an inspection due to equipment malfunction or other issues, I would first try to fix the issue as quickly as possible so we could continue with the inspection. If it’s something that can’t be fixed right away, I would let my supervisor know what happened and see if there is another way to get the job done. For example, if I couldn’t use the x-ray machine because of a power outage, I might do more visual inspections until the power came back on.”

How well do you work with others in a team environment?

Teamwork is an important skill for NDT inspectors to have. The interviewer may ask this question to learn more about your interpersonal skills and how you interact with others in a team setting. Use examples from past experiences where you’ve worked well with others on a project or task.

Example: “I enjoy working as part of a team because it allows me to share my knowledge and experience with others. In the past, I’ve been part of several teams that were tasked with finding defects in metal structures. During these projects, I was able to work alongside other experienced NDT inspectors who taught me new techniques and helped me understand different aspects of the job. This allowed us to complete our tasks much faster than we would have if we had gone into them alone.”

Do you have any questions for us about the position or company?

This question is your opportunity to show the interviewer that you have done some research on their company and are genuinely interested in working for them. It’s also a chance to learn more about the position, including what skills or experience they’re looking for and how it fits into the company as a whole.

Example: “I noticed that this role requires NDT Level III certification. I’m currently studying for my Level II certification but plan to complete it by the end of next month. I was wondering if there were any opportunities for professional development within the company? I’d love to take advantage of training courses or workshops to help me prepare for my Level III exam.”

When performing an ultrasonic test, what does the test result mean when the echoes are scattered?

This question is a continuation of the previous one, and it tests your knowledge of NDT testing. Your answer should show that you understand what each test result means and how to interpret them correctly.

Example: “When the echoes are scattered, this indicates that there is an irregular surface or a flaw in the material being tested. The depth of the flaw can be determined by measuring the time between the transmitted pulse and the first echo. If the time is longer than expected, then the flaw is deeper.”

We want to become known for having the best NDT services in the industry. What would you do to help us achieve this goal?

This question is a great way to see how you can contribute to the company’s overall success. It also shows that they are looking for employees who want to help them grow and succeed as a business. When answering this question, it’s important to show your enthusiasm for helping the company achieve its goals.

Example: “I would start by making sure all of our equipment was in top condition at all times. I’d make sure we had enough staff members to handle any rush jobs or emergencies. I’d also ensure that all of our NDT inspectors were properly trained so they could perform their duties efficiently. Finally, I’d work hard to maintain good relationships with clients so they keep coming back.”

Describe your process for performing an internal inspection.

This question is an opportunity to show your interviewer that you have the skills and knowledge necessary for this role. You can answer by describing a specific internal inspection you performed in the past, or you can describe how you would perform one if you haven’t done so before.

Example: “I always start with a visual inspection of the area I’m inspecting. This helps me get a better idea of what I’ll be looking for during my other tests. Next, I use a penetrant test to check for cracks and leaks. After that, I use ultrasonic testing to look for flaws in welds and metal fatigue. Finally, I use magnetic particle testing to inspect for corrosion.”

What makes you the best candidate for this position?

Employers ask this question to learn more about your qualifications and how you can contribute to their company. Before your interview, make a list of all the skills and experiences that make you an ideal candidate for this position. Focus on highlighting your most relevant experience and soft skills.

Example: “I am the best candidate for this position because I have five years of NDT inspection experience in both commercial and industrial settings. In my previous role, I worked with many different types of metals and developed a strong understanding of what makes each material unique. My extensive knowledge of metal structures also allows me to work efficiently and accurately.

In addition to my technical expertise, I am also a highly organized individual who is able to prioritize tasks effectively. Throughout my career, I have always met deadlines and exceeded expectations. I believe these qualities make me the perfect candidate for this position.”

Which nondestructive testing methods are you most comfortable using?

This question can help the interviewer determine your level of experience with NDT methods. It can also show them which methods you prefer to use and why. When answering this question, it can be helpful to mention a few reasons for your preferences.

Example: “I am most comfortable using ultrasonic testing because I find it’s one of the fastest nondestructive testing methods available. In my previous role as an NDT inspector, I was able to complete many projects in less time than expected due to my expertise with ultrasonic testing. Another method that I’m comfortable using is radiographic testing because I have extensive training in its use. I’ve found that radiographic testing is useful when inspecting welds or other metal structures.”

What do you think is the most challenging part of being an NDT inspector?

This question can help the interviewer get a better idea of your personality and how you handle challenges. Your answer should show that you are willing to take on difficult tasks, but also that you know when to ask for help or support.

Example: “The most challenging part of being an NDT inspector is having to work in uncomfortable environments. I have had to inspect bridges while it was raining, which made it hard to see what I was doing. I always make sure to bring extra clothes so I can change if I get wet. Another challenge is working with people who don’t understand why we need to do certain tests. I try to explain things as best as I can, but sometimes they still aren’t happy about it.”

How often do you perform inspections?

This question can help the interviewer understand your experience level and how you might fit into their company. If they ask this question, it’s likely that they are looking for someone who performs inspections regularly. Your answer should include information about how often you perform inspections and what types of projects you’ve worked on in the past.

Example: “In my current position, I perform NDT inspections once a month. However, when I first started working as an inspector, I performed them every two weeks. As I gained more experience, I was able to increase the frequency of my inspections.”

There is a learning curve associated with becoming proficient in all of the different nondestructive testing methods. When can we expect you to be an expert at all of the tests we perform here?

Interviewers want to know that you are willing to put in the time and effort to learn their company’s processes. They also want to make sure you understand how long it will take for you to become proficient at all of the tests they perform. Your answer should include a timeline for when you expect to be an expert at each test, as well as your plan for learning them.

Example: “I have been performing NDT testing for five years now, so I am already quite familiar with most of the common methods. However, there are always new techniques being developed, so I would like to continue my education by taking courses or reading articles on the latest developments. I can complete this within six months of starting here.”