CP-189 Explained for NDT Level III Candidates

CP‑189 is where the ASNT Level III Basic exam stops being theory and starts feeling like real responsibility. If SNT‑TC‑1A lets employers customize, CP‑189 is the line in the sand—it tells you what shall be done, not just what should be done.

Let’s walk through CP‑189 (2024) the way an NDT Level III candidate needs to see it: as a live framework for how you design, defend, and audit an NDT certification program—and along the way, I’ll show you exactly where the Basic exam likes to probe your understanding.

What CP‑189 really is (and why Level III candidates must respect it)

CP‑189 is not a guideline. It’s a standard. (So, if applies, it is a mandatory requirement).

Right up front, the Scope makes that clear:

“This standard establishes the minimum requirements for the qualification and certification of nondestructive testing (NDT) and predictive maintenance (PdM) personnel.”

And:

“This standard requires the employer to establish a procedure for the certification of NDT personnel.”

Key ideas for the exam:

• Minimum requirements → you cannot go below them.
• Employer must have a certification procedure → not optional.
• Unique/additional requirements must be incorporated → CP‑189 is a floor, not a ceiling.

For Level III candidates, CP‑189 is the document you use when someone asks: “What is the minimum we are allowed to do and still be compliant?”

“Shall” vs “Should”: CP‑189 vs SNT‑TC‑1A

You already know this is one of the most tested contrasts on the Basic exam:

• SNT‑TC‑1A → Recommended Practice → “should” → employer flexibility.
• CP‑189 → Standard → “shall” → minimum mandatory requirements.

CP‑189 uses “shall” everywhere in its core requirements. For example:

“This standard requires that the employer incorporate any unique or additional requirements in the certification procedure.”

That’s not a suggestion. If your company has customer‑specific or regulatory requirements, they must be written into the certification procedure.

Exam mindset:
When a question references CP‑189, think compliance. When it references SNT‑TC‑1A, think flexibility.

3. Definitions that trip up Level III candidates

Section 2.0 is full of terms that look familiar but are defined very precisely for this standard.

A few that the exam loves:

• Certification
  • “Certification: written testimony that an individual has met the applicable requirements of this standard.”
  • Not just “qualified”—they must meet CP‑189 requirements.
• Certification Procedure
  • “Certification Procedure: a written procedure, developed by the employer, that details the requirements for qualification and certification of an employee to this national standard.”
  • This is CP‑189’s equivalent of the SNT‑TC‑1A Written Practice—but with shall behind it.
• Experience
  • “Experience: actual performance of an NDT method conducted in the work environment… This does not include formal classroom training but may include laboratory and on‑the‑job training as defined by the employer’s certification procedure.”
  • The exam will test whether you can separate training hours from experience hours correctly.
• Practical Examination
  • “An examination used to demonstrate an individual’s ability in conducting the NDT methods that will be performed for the employer… observations and results must be documented.”
  • Documentation is not optional.
• Predictive Maintenance (PdM)
  CP‑189 explicitly includes PdM in its scope, with a detailed definition that mirrors SNT‑TC‑1A but is tailored to this standard.

Exam tip:
When you see a question that hinges on a subtle word like “qualification,” “certification,” or “experience,” assume the exam is testing whether you know CP‑189’s exact definition.

4. Levels of qualification: how CP‑189 structures your people

Section 3.0 defines six levels of qualification, but for the Basic exam, three are central: Level I, Level II, and Level III (plus Level II Limited and Instructor in some questions).

4.1 NDT Level III

“An NDT Level III shall have the skills and knowledge to establish techniques; to interpret codes, standards, and specifications; to designate the particular technique to be used; and to verify the adequacy of procedures.”

And:

“The NDT Level III shall be capable of conducting or directing the training and examining of NDT personnel in the methods for which the NDT Level III is qualified.”

This is exactly the role you’re being tested for in the Basic exam: administrator, interpreter, and technical authority.

4.2 NDT Level II

“An NDT Level II shall have the skills and knowledge to set up and standardize equipment, to conduct tests, and to interpret, evaluate, and document results in accordance with procedures approved by an NDT Level III.”

Level II is the workhorse—CP‑189 expects them to be fully functional within approved procedures.

4.3 NDT Level I

“An NDT Level I shall have the skills and knowledge to properly perform specific standardizations, specific tests, and, with prior written approval of the NDT Level III, perform specific interpretations and evaluations…”

Note the nuance: Level I can interpret/evaluate only with prior written approval of the Level III and only for specific tasks.

4.4 Trainee

“Trainees shall work with a certified person, under the direction of an NDT Level II or NDT Level III and shall not independently conduct any tests or write a report of test results.”

This is a classic exam scenario: a trainee signing reports or working alone is a direct violation of CP‑189.

Training requirements: what “minimum” really means

Section 4.1 is where CP‑189 gets very concrete.

“Candidates for certification as NDT Level I or Level II shall complete sufficient organized training to become familiar with the principles of the method and the practices of the applicable test technique.”

And:

“The minimum number of training hours required for NDT Level I and Level II candidates is described in Appendixes A and B. The course shall include the topics contained in ANSI/ASNT CP‑105…”

Key exam points:

• Training must follow a course outline approved by an NDT Level III.
• CP‑105 is explicitly referenced for topic coverage.
• Training can be instructor‑led, virtual, computer‑based, or web‑based—but:
  • “Computer‑based training and web‑based training shall track hours and content of training with student examinations…”

And to receive credit:

“To receive credit for training hours, the individual shall pass a final examination covering the topics contained in that program.”

So if there’s no final exam, there’s no training credit under CP‑189.

6. Experience requirements: what counts and what doesn’t

“Experience: actual performance of an NDT method conducted in the work environment… This does not include formal classroom training but may include laboratory and on‑the‑job training as defined by the employer’s certification procedure.”

And:

“The minimum number of hours of experience required for NDT Level I and Level II candidates is described in Appendix A.”

Important for the exam:

• Classroom training ≠ experience.
• Lab and OJT may count as experience if the certification procedure defines it.
• Previous training/experience can be accepted—but only if:
  • “Documented and verified. Any claimed training or experience that is not documented and cannot be verified shall be considered invalid.”

Expect scenario questions where a candidate’s undocumented experience must be rejected.

7. NDT Instructor and Outside Organization: subtle but testable

7.1 NDT Instructor

“An NDT instructor shall have the skills and knowledge to plan, organize, and present… in accordance with course outlines approved by an NDT Level III.”

And they must meet at least one of several criteria (ASNT Level III, degree + knowledge, 2‑year school + 5 years Level II, or 10+ years Level II).

7.2 Outside Organization

“At the option of the employer, an outside organization may be engaged to perform the duties of an NDT Level III… the employer shall be responsible for evaluating the organization… and be so documented.”

The exam will test whether you understand that outsourcing Level III services does not outsource responsibility—the employer still owns compliance.

8. Certification procedure: CP‑189’s non‑negotiable core

Section 5.0 is the heart of CP‑189 from an administrative perspective.

“The employer shall develop and maintain a procedure detailing the program that will be used for qualification and certification of NDT personnel in accordance with this standard.”

The procedure shall include at least:

• Duties and responsibilities
• Training requirements
• Experience requirements
• Examination requirements
• Records and retention
• Recertification requirements

And:

“The employer’s certification procedure shall be approved by an NDT Level III designated by the employer.”

Exam angle:
If a scenario shows a company using CP‑189 but with no written certification procedure, or one not approved by a Level III, that’s non‑compliant.

9. Examinations: vision, written, practical—and where CP‑189 is strict

We only see the start of Section 6.0 in the excerpt, but even that contains exam‑worthy details.

9.1 Vision

“Prior to certification, NDT personnel shall be examined to ensure that they have natural or corrected (no pharmacological agents) near‑distance acuity in at least one eye…”

This mirrors the SNT‑TC‑1A 2024 change on eye drops—but here it’s in standard language.

Key points:

• Vision exams are mandatory prior to certification.
• Pharmacological agents (eye drops) are not allowed to enhance vision.
• Results must be documented (later in the standard).

9.2 General, Specific, Practical

CP‑189 requires all three for Level I and II:

• General → basic principles of the method.
• Specific → procedures, codes, standards, equipment used by the employer.
• Practical → demonstration of ability, with documented observations and results.

The Basic exam will often give you a scenario where one of these is missing or improperly administered and ask whether certification is valid.

10. Expiration, suspension, revocation, and recertification

Later sections (7.0 and 8.0) formalize what SNT‑TC‑1A treats as recommendations:

• Expiration → certification has a defined validity period.
• Suspension/Revocation → for cause (e.g., failure to meet vision, misconduct, or interrupted service).
• Reinstatement/Recertification → must follow the employer’s CP‑189‑compliant procedure.

The 2024 edition also clarifies when certification actually begins—aligning with the SNT‑TC‑1A interpretation that the start date is tied to the Certifying Authority’s signature.

Exam mindset:
If a candidate’s certification has expired or been suspended, they are not certified, regardless of their skills or history.

11. Records: the paper trail that makes or breaks an audit

CP‑189 is explicit that the certification procedure must define:

“Records and documentation requirements, including control, responsibility, and retention period.”

Typical records include:

• Training hours and exams
• Experience logs
• Vision exam results
• Written, specific, and practical exam results
• Certification and recertification documents
• NDT Instructor designations
• Outside organization evaluations

The Basic exam will absolutely test whether you know what must be documented and who is responsible.

12. How to study CP‑189 like a Level III (not like a memorizer)

Here’s how to turn CP‑189 from a dense standard into something you can use under exam pressure:

12.1 Read by role, not by paragraph

Ask yourself:

• As a Level III, what does CP‑189 say I shall do?
• As an employer, what must my certification procedure contain?
• As an auditor, what records would I ask for?

12.2 Build mental checklists

For example, for a Level II candidate under CP‑189:

• Minimum training hours (per Appendix A/B)
• Training per CP‑105 topics
• Final exam passed for training credit
• Minimum experience hours met
• Vision exam passed and documented
• General, Specific, Practical exams passed
• Certification procedure followed and signed by Certifying Authority

If any of these are missing in a scenario, you know certification is non‑compliant.

12.3 Practice with CP‑189‑based questions

The Basic exam doesn’t just ask, “What is CP‑189?” It asks:

• “Is this certification valid under CP‑189?”
• “Can this previous experience be accepted?”
• “Is this training program compliant?”

You need to be fluent enough with the standard to answer those in seconds.

13. Want structured practice? Use a question bank built on the 2024 editions

If you’re serious about passing the Level III Basic exam under the 2024 SNT‑TC‑1A and CP‑189 references, you need more than just reading—you need to see how these rules are turned into exam traps.

That’s exactly what the ASNT Level III Basic Latest Question & Answers Bank is designed for.

You can check it out here.

What makes a targeted Q&A bank valuable at your level:

• Questions aligned with the 2024 editions (not outdated 2020 language).
• Scenario‑based items that mirror how CP‑189 and SNT‑TC‑1A appear on the real exam.
• Administrative focus—new hire transfers, interrupted service, outside Level III, vision failures, documentation gaps.
• Repetition of high‑value concepts like “shall vs should,” certification vs qualification, and the structure of the certification procedure.

Used alongside your direct reading of CP‑189 and SNT‑TC‑1A, a bank like this turns standards from static PDFs into muscle memory.

14. Final takeaway for NDT Level III candidates

If you strip away the legal language, CP‑189 (2024) is telling you:

• You are responsible for a system, not just a test.
• That system must be documented, defensible, and auditable.
• Training, experience, exams, and records are all part of one coherent certification procedure.
• “Shall” means you don’t get to ignore it because “we’ve always done it this way.”

If you can look at any NDT personnel file and confidently answer, “Is this CP‑189 compliant?”—you’re thinking like the Level III the Basic exam is trying to measure.

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