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Exam Review

Key Facts: ASNT NDT Level III Basic Exam

135

Multiple-Choice Questions

ASNT Level III Basic examination

4 hrs

Exam Time Limit

ASNT Pearson VUE delivery

70–80%

Typical Cut-Score Range

ASNT psychometrics information

11

NDT Methods in Basic Outline

ASNT Level III examinations page

2024

Current SNT-TC-1A / CP-189 Edition

ASNT standards update

Pearson VUE

Test Delivery

ASNT certification scheduling

The ASNT NDT Level III Basic exam is 135 multiple-choice questions over 4 hours, taken in person at a Pearson VUE test center or an ASNT authorized exam center. ASNT sets the passing score with the Angoff or IRT method, and its exams typically fall in the 70%–80% range. Basic exams taken after 1 January 2026 reference the 2024 editions of SNT-TC-1A and CP-189, and exam items are written from the ANSI/ASNT CP-105 topical outlines. Certification requires the Basic plus at least one method exam.

Sample ASNT NDT Level III Basic Practice Questions

Try these sample questions to review concepts for the ASNT NDT Level III Basic exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 112+ question experience with AI tutoring.

1Which iron-carbon phase has a face-centered cubic (FCC) crystal structure and exists at elevated temperatures in plain carbon steels?
A.Ferrite (alpha iron)
B.Austenite (gamma iron)
C.Cementite (Fe3C)
D.Martensite
Explanation: Austenite (gamma iron) has a face-centered cubic structure and is the high-temperature phase of iron-carbon alloys. It dissolves significantly more carbon than ferrite and is the starting point for most heat treatment cycles.
2Which heat treatment process is used primarily to soften a metal, relieve internal stresses, and refine grain structure by slow cooling from above the upper critical temperature?
A.Quenching
B.Tempering
C.Full annealing
D.Surface hardening
Explanation: Full annealing involves heating ferrous alloys above the upper critical temperature and slow furnace cooling to produce a soft, machinable, equilibrium microstructure with relieved internal stresses and refined grain.
3Which welding process uses a continuously fed bare wire electrode and a shielding gas, and is sometimes called MIG welding?
A.Shielded Metal Arc Welding (SMAW)
B.Gas Metal Arc Welding (GMAW)
C.Gas Tungsten Arc Welding (GTAW)
D.Submerged Arc Welding (SAW)
Explanation: Gas Metal Arc Welding (GMAW), commonly called MIG, uses a continuously fed consumable wire electrode with an externally supplied shielding gas such as argon, CO2, or a mixture to protect the arc and weld pool.
4Which casting process uses a wax pattern that is melted out of a ceramic shell before molten metal is poured?
A.Sand casting
B.Die casting
C.Investment casting
D.Centrifugal casting
Explanation: Investment casting (lost-wax casting) creates a wax pattern that is coated with a ceramic slurry; the wax is melted out, leaving a hollow ceramic shell into which molten metal is poured. The process is known for producing complex shapes with excellent dimensional accuracy and surface finish.
5Which of the following is a typical discontinuity inherent to wrought rolled plate and oriented parallel to the rolling direction?
A.Cold shut
B.Lamination
C.Burst
D.Shrinkage cavity
Explanation: Laminations are planar discontinuities oriented parallel to the surface of rolled product. They originate from non-metallic inclusions or pipe in the ingot that get flattened and elongated during hot rolling.
6Which NDT method is best suited for detecting surface-breaking discontinuities in non-ferromagnetic materials such as aluminum, stainless steel, and plastics?
A.Magnetic particle testing (MT)
B.Liquid penetrant testing (PT)
C.Ultrasonic testing (UT)
D.Radiographic testing (RT)
Explanation: Liquid penetrant testing detects surface-breaking discontinuities in essentially any non-porous material, including non-ferromagnetic metals and many plastics. MT is restricted to ferromagnetic materials.
7According to SNT-TC-1A (2024), how is the document best characterized?
A.A federal regulation enforced by OSHA
B.An ASNT recommended practice that establishes guidelines for an employer-based qualification and certification program
C.An ANSI consensus standard with mandatory requirements
D.An ISO international standard for central certification
Explanation: SNT-TC-1A is an ASNT recommended practice providing guidelines for an employer-based program for the qualification and certification of NDT personnel. It is not a regulation, and it is intentionally written to allow employer-specific written practices.
8Under SNT-TC-1A and CP-189, which document establishes the employer's specific qualification and certification practices?
A.The Level III certificate of the certifying agent
B.The employer's written practice
C.The SNT-TC-1A foreword
D.The Pearson VUE candidate handbook
Explanation: Both SNT-TC-1A and CP-189 require the employer to establish a written practice for the control and administration of NDT personnel training, examination, and certification. The written practice is the controlling document at the employer level.
9Which CP-189 requirement differs most clearly from SNT-TC-1A?
A.CP-189 contains mandatory requirements; SNT-TC-1A contains recommendations
B.CP-189 applies only to nuclear inspections
C.CP-189 eliminates the need for an employer written practice
D.CP-189 allows self-certification without examinations
Explanation: CP-189 is an ANSI standard whose requirements are mandatory once it is invoked, while SNT-TC-1A is a recommended practice intended to be tailored by the employer. CP-189 also imposes minimum education, training, and experience requirements that cannot be reduced.
10What is the primary purpose of ANSI/ASNT CP-105?
A.To certify Level III examiners
B.To provide topical outlines for training NDT personnel by method and level
C.To replace SNT-TC-1A with a mandatory rule
D.To define acceptance criteria for ultrasonic indications
Explanation: ANSI/ASNT CP-105 provides the topical outlines used to develop training courses for NDT personnel at each qualification level for each method. It is the curriculum reference that supports SNT-TC-1A and CP-189 training requirements.

About the ASNT NDT Level III Basic Exam

The ASNT NDT Level III Basic Examination is required, together with at least one method examination, for ASNT NDT Level III certification. It verifies a candidate's command of materials and manufacturing processes, common discontinuities, the principles and limitations of the major NDT methods, and the personnel-qualification frameworks defined by SNT-TC-1A and CP-189.

Exam sponsor: American Society for Nondestructive Testing (ASNT) / Pearson VUE. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

135 multiple-choice items in 4 hours, including unscored pretest questions, across five domains: NDT Certification; Application of NDT Methods; NDT Training; Technical Knowledge in Materials Science & Process Technology; and Codes, Standards, Specifications, & Procedures. ASNT does not publish domain weights.

Time Limit

4 hours

Passing Score

Criterion-referenced cut score set by the Angoff or IRT method; ASNT says its exams typically fall in the 70%–80% range

Exam / Certification Fees

Tiered member/non-member fees via Pearson VUE

Exam sponsor website

Reported exam pass rate: Not publicly disclosed. Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

Not published

NDT Certification

Qualification and certification processes, personnel qualification programs and certification exams, competency evaluation, certification program audits, and method requirements.

Not published

Application of NDT Methods

AE, ET, IR, LT, MFL, MT, NR, PT, RT, UT and VT: method and technique selection, procedures, calibration checks, flaw interpretation and evaluation, reporting, and NDT process audits.

Not published

NDT Training

Developing and approving training programs, instruction, on-the-job training (OJT), mentoring, refresher training, and oversight of instructors.

Not published

Technical Knowledge in Materials Science & Process Technology

Flaw types by material and process, trends in materials and manufacturing, product research, material failure investigations, destructive-test sampling, and evaluating NDT techniques.

Not published

Codes, Standards, Specifications, & Procedures

Interpreting code and standard requirements, developing and approving procedures and work instructions, quality control, acceptance criteria, and external customer audits.

Preparing for the ASNT NDT Level III Basic Exam

What You Need to Know

  • Passing score: Criterion-referenced cut score set by the Angoff or IRT method; ASNT says its exams typically fall in the 70%–80% range
  • Assessment: 135 multiple-choice items in 4 hours, including unscored pretest questions, across five domains: NDT Certification; Application of NDT Methods; NDT Training; Technical Knowledge in Materials Science & Process Technology; and Codes, Standards, Specifications, & Procedures. ASNT does not publish domain weights.
  • Time limit: 4 hours
  • Exam / certification fees: Tiered member/non-member fees via Pearson VUE Official sources

Using Our Practice Resources

  • Work through all 112 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

ASNT NDT Level III Basic: Suggested Study Strategy

1Memorize the practical differences between SNT-TC-1A (recommended practice) and CP-189 (mandatory standard), especially around training hours, experience, and re-examination.
2Learn the 11 NDT methods named in the Basic outline (AE, ET, IR, LT, MFL, MT, NR, PT, RT, UT, VT) by purpose, principle, equipment, and a single strength and a single limitation for each.
3Tie every common discontinuity back to the process that produces it: porosity to welding gas entrapment, laminations to rolling, cold shuts to casting, laps to forging.
4Drill ferrous metallurgy basics: iron-carbon phases, heat treatment effects (annealing, normalizing, quenching, tempering), and how they change strength and toughness.
5Practice classifying discontinuities as inherent, processing, or service before identifying the specific defect.
6Build a side-by-side comparison chart of UT, RT, MT, PT, ET, and VT covering applicable materials, surface vs subsurface detection, and major limitations.
7Use CP-105 outlines as a checklist; if a topic appears in CP-105 you should be able to recognize it on the exam.
8Take timed 135-question practice sets to build the pacing needed to finish within the 4-hour window.

Frequently Asked Questions

How many questions are on the ASNT NDT Level III Basic exam?

The Basic examination contains 135 multiple-choice items, administered over a 4-hour session; some are unscored pretest questions. ASNT lists five domains (NDT Certification; Application of NDT Methods; NDT Training; Technical Knowledge in Materials Science & Process Technology; and Codes, Standards, Specifications, & Procedures) but publishes no domain weights.

What passing score do I need?

ASNT sets each exam's passing (cut) score with the Angoff or Item Response Theory method and says its exams typically fall in the 70% to 80% range. Level III certification requires passing both the Basic and at least one method examination.

How long is the exam?

The Basic examination is a single 4-hour session taken in person at a Pearson VUE testing center or an ASNT authorized exam center (AEC). The exam is closed-book and computer-based.

How much does the Basic exam cost?

ASNT uses tiered member and non-member pricing for Level III examinations. Members pay reduced rates compared with non-members; current fees are published on the ASNT certification site and the Pearson VUE delivery platform.

What standards does the Basic exam reference?

For Basic exams taken after 1 January 2026, ASNT replaced the 2020 editions of SNT-TC-1A and CP-189 with the 2024 editions. ASNT writes all exam questions from the topical outlines in ANSI/ASNT CP-105.

Is the Basic exam method-specific?

No. The Basic exam covers general knowledge of the 11 methods named in its outline (AE, ET, IR, LT, MFL, MT, NR, PT, RT, UT, VT), plus materials, processes, training, and certification standards. Method examinations are separate and can be passed before or after the Basic.

How do I schedule the exam?

Apply through ASNT and pay the fees; once the application is approved, schedule through your MyCert account at a Pearson VUE center or an authorized exam center. All exams you applied for must be completed within one year of the Letter of Approval.