NDT Level II Methods Compared: UT MT PT RT VT and ET

Why Your Method Choice Shapes Everything

Choosing to pursue ASNT NDT Level II certification is a career decision. Choosing which method to certify in first-or next-is a technical and strategic decision that most candidates underestimate. Ultrasonic Testing (UT), Magnetic Particle Testing (MT), Liquid Penetrant Testing (PT), Radiographic Testing (RT), Visual Testing (VT), and Electromagnetic Testing (ET) are not interchangeable paths to the same credential. They differ in physics, in the industries that require them, in how the exam domains weight the material, and in the prerequisites you must satisfy before you can even sit for the exam.

This guide breaks down all six ASNT NDT Level II methods with enough specificity to help you understand exactly what each certification demands-from the exam room to the job site.

The Six ASNT NDT Level II Methods at a Glance

Exam Structure: What Changes and What Stays the Same

Across all six methods, the ASNT NDT Level II exam follows the same structural framework governed by ANSI/ASNT CP-105 Standard Topical Outlines. What remains constant: the General exam is always 50 multiple-choice questions covering fundamentals, principles, and theory. The Specific exam is always 40 multiple-choice questions based on an industry sector NDT procedure-either General Industry or Pressure Equipment. The passing threshold never changes: a composite minimum of 80%, with a floor of 70% on the General exam and 80% on the Specific exam.

What changes dramatically between methods is the weighting of the six exam domains. A candidate preparing for UT will find that Techniques and Calibration commands far more of the exam than it does for PT, where Interpretation and Evaluation of indications carries heavier emphasis. RT candidates face the most demanding Safety Considerations domain of any method due to radiation regulatory requirements. Understanding these shifts is not optional-it directly determines where you spend your limited preparation time.

Before your exam date, make sure you're clear on all registration mechanics. The NDT Level II Exam Registration Steps and Requirements 2026 article covers fee structures (including ASNT member reduced rates), how to schedule through Pearson VUE, and what documentation to submit before your application is approved.

Domain Deep Dive: How Each Method Tests Differently

Ultrasonic Testing (UT)

Radiographic Testing (RT)

Magnetic Particle Testing (MT) and Liquid Penetrant Testing (PT)

MT and PT are often considered more accessible entry points for candidates new to NDT Level II certification, but "accessible" does not mean "easy." The PT exam places significant weight on Interpretation and Evaluation because distinguishing relevant indications from non-relevant ones (mechanical marks, porosity patterns, cold shuts) requires trained judgment that cannot be faked with surface-level study. The MT exam demands thorough understanding of magnetization techniques-circular, longitudinal, yoke, prod-and the specific amperage ranges required for different material thicknesses and geometries.

Visual Testing (VT)

VT is the only method where the Equipment and Materials domain encompasses optical aids, lighting equipment, and remote visual inspection (RVI) tools like borescopes and robotic crawlers alongside the basic tools of direct visual examination. VT candidates should not underestimate the Procedures, Codes, and Standards domain-the specific exam sector (General Industry vs. Pressure Equipment) will heavily reference applicable codes for weld acceptance criteria, surface finish requirements, and dimensional tolerances.

Electromagnetic Testing (ET)

ET, covering eddy current and related techniques, is particularly demanding in the Techniques and Calibration domain. Candidates must understand impedance plane analysis, liftoff effects, fill factor, phase angle interpretation, and how to distinguish signal responses from different flaw types. The ET exam is often pursued by candidates already experienced in tubing inspection or aerospace manufacturing, where eddy current screening is a primary quality tool.

The Open-Book Specific Exam Advantage-and Its Limits

Every ASNT NDT Level II Specific exam is open-book. You receive a procedure document during the exam and may reference it throughout. This feature misleads some candidates into underestimating this portion of the exam. The 40 Specific exam questions are written to test your ability to apply the procedure, not just locate a value in a table. You need to know the document's structure well enough to navigate it under time pressure, and you need to understand what the procedure requires well enough to answer scenario-based questions correctly.

The Specific exam also requires you to select between General Industry and Pressure Equipment as your industry sector when you register. These two sectors use different procedure documents with different acceptance criteria, calibration requirements, and coverage parameters. Switching sectors means sitting for a different exam-this is not a minor administrative detail.

Prerequisites Vary Significantly by Method

All six ASNT NDT Level II methods require candidates to satisfy prerequisites before sitting for the exam: method-specific training hours, work experience hours, a visual acuity examination, and an employer-administered practical exam per SNT-TC-1A 2020 requirements. However, the number of required training and experience hours varies by method, and your employer's written practice (the facility-level document that implements SNT-TC-1A) governs the exact minimum hours applicable to your situation.

RT candidates typically face the most additional pre-certification burden because of radiation worker training requirements that exist independently of ASNT's NDT training hours. ET candidates may need method-specific equipment familiarization hours that are harder to accumulate without access to eddy current instrumentation. VT, MT, and PT tend to have lower training hour thresholds, though this should never be interpreted as a lower standard of professional practice.

ASNT members receive reduced fees on certification applications, which can be meaningful when you're pursuing multiple method certifications over a career. Review the current fee schedule at the time of registration since fees are subject to change.

Choosing Your First (or Next) Method Strategically

Candidates entering NDT should select their first Level II method based on three factors in order of priority: employer requirement, career trajectory, and study accessibility. If your employer inspects pressure vessels using UT and RT, those are your methods-full stop. If you have flexibility, consider where your current work experience hours are accumulating, because that clock starts ticking toward your prerequisites whether or not you've decided to certify yet.

Candidates already holding one Level II certification who are adding a second should evaluate ET or UT as high-value additions in aerospace and power generation markets, and RT for candidates in oil and gas or petrochemical sectors where ASME code work dominates. The NDT Level II Methods Compared: UT MT PT RT VT and ET overview provides additional context for understanding how each method positions you in the job market.

For hands-on practice questions organized by method and domain, the NDT Level II practice test platform is structured around the same six-domain framework used in the actual ASNT exams-making it directly applicable to your preparation regardless of which method you're targeting.

Structuring Study Around Domains, Not Just Methods

The most effective preparation strategy for any ASNT NDT Level II exam is to organize study by domain weight, not by chapter or textbook sequence. Here is how to structure a focused preparation block once you have your exam date confirmed:

Your certification remains valid for five years. Renewal requires either an employer attestation of continued Level II practice in the method or re-examination. Candidates who allow their certification to lapse without continued practice in the specific method will likely need to re-examine-the practical knowledge required for the exam reflects real working proficiency, not just memorized facts.

For a complete walkthrough of the application process, documentation requirements, and how to schedule your exam through Pearson VUE or an ASNT Authorized Exam Center, see the NDT Level II Exam Registration Steps and Requirements 2026 guide before submitting your application.

Frequently Asked Questions