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About this exam

Inspection & Testing (ET105) is a multiple-choice examination covering the knowledge an inspection or testing technician needs to verify that materials, components, and fabricated work meet specified requirements. It suits quality inspectors, NDT trainees, welding and fabrication QA staff, laboratory technicians, and engineers who sign off on test results, as well as candidates building a formal credential in inspection practice. The exam spans nine domains: inspection fundamentals and terminology; codes, standards, and regulatory requirements; visual and dimensional inspection; non-destructive examination methods; destructive and mechanical testing; test equipment, calibration, and measurement uncertainty; sampling, test procedures, and data recording; and acceptance criteria, reporting, and documentation, closing with safety, ethics, and quality assurance. NDT methods carry the largest weight, so plan study time accordingly. Preparation works best as a staged build: master terminology and the code hierarchy first, then dimensional and visual technique, then NDT and mechanical testing, then calibration, sampling, and reporting so you can tie results back to acceptance criteria. Work through practice questions domain by domain, keep a formula and definition sheet, and rehearse reading a test record to a decision. This page is independent study material and is not affiliated with the certifying body; confirm current administrative details on the official website.

What you'll study

Common questions

About Inspection & Testing (ET105) preparation

What is the exam format?

It is a multiple-choice examination delivered in a single sitting. Expect questions that mix recall of definitions and code requirements with applied scenarios, such as choosing a method for a defect type or deciding whether a recorded result meets acceptance criteria. The official body publishes the current item count, delivery options, and any permitted reference material.

How difficult is ET105?

Most candidates find the terminology and visual inspection material straightforward and the NDT and mechanical testing domains demanding, because those questions test method selection and interpretation rather than memorization. If you have hands-on inspection experience you will recognize many scenarios; if not, budget extra time for NDT principles and acceptance criteria.

How long is the exam, and how many questions are there?

The certifying body publishes the current question count and time allowance, and they can change between exam versions. Check the official site before scheduling. As a planning rule, practice under timed conditions at roughly the pace you expect on exam day so that long scenario questions do not force you to rush the final domain.

What score do I need to pass?

The passing score is set by the certifying body and is published on its official website along with any scoring or scaling policy. Do not rely on numbers quoted in forums or study guides, which are often out of date. Aim well above the published threshold in practice tests to leave margin for exam-day pressure.

Can I retake the exam if I fail?

Retake rules, waiting periods, and any fee for a second attempt are set by the certifying body and are not fixed across versions of the exam. Check the official site for the current policy before you schedule. Many candidates use the score report to identify weak domains and study those before rebooking.

In what order should I study the domains?

Start with fundamentals and terminology, then codes and standards, so later questions have context. Move to visual and dimensional inspection, then NDT and destructive testing, which carry the most weight. Finish with equipment and calibration, sampling and data recording, then acceptance criteria and reporting, and review safety and ethics last.

What are the most common failure modes?

Candidates most often lose marks by confusing similar NDT methods and their typical defect sensitivities, misreading acceptance criteria thresholds, and forgetting that calibration status affects whether a result is valid. Weakness in measurement uncertainty and sampling logic is also common. Practicing applied scenario questions exposes these gaps faster than rereading notes.

Do I need practical experience to pass?

The exam is knowledge-based and can be passed through study, but practical exposure makes the scenario questions much easier because you will have seen how a test record is actually completed. If you lack field experience, use worked examples and case studies of inspection reports to build that familiarity.

How should I use practice questions?

Work one domain at a time, and after each set write down why every wrong option was wrong, not just why the right one was right. That habit builds the discrimination the exam tests. Revisit missed questions after a week, and take at least one full timed practice run before the real sitting.

Is this page affiliated with the exam provider?

No. This is independent study material produced for exam preparation and is not endorsed by or affiliated with the certifying body. Always confirm registration, fees, scheduling, and current policies directly with the official provider, since administrative details change and only their published information is authoritative.