2.2 Vision, Practical Exams, and the Employer's Written Practice
Key Takeaways
- Employers—not Pearson VUE or the ASNT computer-based exam—are responsible for visual acuity, practical, and any job-specific exams required by their written practice to finish ASNT NDT Level II certification.
- Typical industry near-vision used in SNT-TC-1A and CP-189 written practices is Jaeger J-1 or equivalent, plus color-contrast discrimination as the practice requires; ASNT does not publish a Level II vision acuity number on the certification page.
- Passing the ASNT 50-question general and 40-question specific exams does not finish certification until the employer administers the remaining written-practice examinations.
- A written practice is the employer's documented procedure implementing SNT-TC-1A or ANSI/ASNT CP-189; ASNT tells employers to review the NDT Level II program document to confirm the central exams meet that procedure.
A candidate can pass both ASNT computer-based papers and still not be finished. ASNT states that employers are responsible for carrying out visual acuity, practical, and any job-specific exams needed by their written practice to finish the certification process. The 50-question general and 40-question specific exams prove written knowledge in a method and industry sector. They do not replace the hands-on and vision checks that keep hardware from being accepted by an inspector who cannot see a Jaeger line or cannot calibrate a yoke.
Why the Employer Still Owns Part of Certification
ASNT NDT Level II is designed to meet Recommended Practice SNT-TC-1A for the written general and specific examinations. ASNT also tells employers to review the NDT Level II program document (CPD-CMC-398) to confirm those program exams meet the employer's own requirements. That sentence is the whole point of this section: central certification and employer certification are complementary, not identical.
If you treat the digital badge as a universal stamp that lets you inspect for any company on any procedure, you will fail a customer audit. If you treat the employer's practical as optional because "ASNT already tested me," you will not finish certification under that written practice.
What a Written Practice Is
A written practice is the employer's documented procedure that implements either:
- Recommended Practice No. SNT-TC-1A (employer-based recommended practice; the employer writes the binding rules), or
- ANSI/ASNT CP-189, ASNT Standard for Qualification and Certification of Nondestructive Testing Personnel (a standard with mandatory language)
The written practice is not a pamphlet. It is the shop law for how that employer qualifies people. Typical contents—set by the recommended practice or standard the employer chose, not invented as unpublished ASNT exam numbers—include:
- methods and techniques the employer uses
- training and experience required at each level
- examinations: general, specific, and practical
- vision requirements and who administers them
- who is the Responsible Level III
- how certification is issued, suspended, revoked, and recertified
- what "significant interruption" means for that employer
ASNT's central exams can satisfy the written general and specific pieces when the employer accepts them. The employer still writes, administers, and records the pieces ASNT does not give you in a Pearson VUE booth.
Three Employer-Owned Examinations
ASNT groups the leftover work into three buckets. Learn the names exactly.
| Examination | Who administers it | What it demonstrates | What it is not |
|---|---|---|---|
| Visual acuity | Employer (or a medical / occupational vision provider the written practice names) | Near vision and, when required, color-contrast discrimination | An ASNT CBT item, a Pearson VUE eye chart, or a published ASNT pass percentage |
| Practical | Employer, to the written practice | Ability to select equipment, calibrate, apply the technique, interpret indications, and document results on real or representative hardware | A second multiple-choice paper mailed by ASNT |
| Job-specific | Employer, when the written practice or contract requires it | Procedure, code, product-form, or customer requirements beyond the ASNT specific exam | Automatically waived because you sat General Industry or Pressure Equipment |
ASNT's public Level II page says applicants must also pass their employer's practical exam and possibly a specific exam. That second "specific" is the employer's job-specific paper or procedure exam, not a secret fourth ASNT CBT.
Vision: What Industry Practices Require — and What ASNT Does Not Publish
ASNT's NDT Level II certification page does not publish a numerical vision acuity, a Jaeger line, or a color-plate score as an ASNT exam number. Do not memorize a fake "ASNT vision cut score."
What you will see in almost every shop is the employer written practice implementing SNT-TC-1A or CP-189:
- Near vision: Jaeger J-1 or equivalent, typically demonstrated with a Jaeger chart at the working distance the practice specifies
- Color contrast: ability to distinguish the contrast between the colors used in the method, as required by the written practice
Jaeger J-1 is a near-vision reading line, not distant 20/20 street vision. An inspector can have a driver's-license restriction and still pass J-1 with corrective lenses. The written practice usually allows vision to be demonstrated naturally or corrected. If you wear readers to pass J-1, you wear readers (or the same correction) when you inspect.
Color contrast is method-dependent. Fluorescent PT and wet fluorescent MT demand that you see a bright indication against a dark background. VT of painted structures may require distinguishing rust bloom from coating. A written practice can require a color-contrast test for those methods and omit it for a monochrome digital RT interpretation station. Follow the practice; do not invent a universal Ishihara mandate as if ASNT published one.
How often vision is rechecked is also a written-practice rule, not an ASNT CBT setting. Many SNT-TC-1A and CP-189 programs re-examine near vision on a periodic cycle defined in that practice. Fail the employer vision check and you are not a finished Level II on that program, regardless of your ASNT badge.
The Practical Examination
The practical exam is the employer's proof that you can do the work, not just answer questions about it. A well-built practical, written to SNT-TC-1A or CP-189, usually requires you to:
- Select the correct equipment and materials for the procedure (yoke versus bench, penetrant family, probe and wedge, film or detector, light source).
- Calibrate or verify the system (gauss meter or pie gauge, UV-A intensity, IIW or DAC block, densitometer or IQI sensitivity, light meter).
- Inspect a specimen or production piece that contains known or representative conditions.
- Interpret indications as relevant, nonrelevant, or false against the acceptance standard named in the procedure.
- Produce a report that a Level III or customer can audit.
ASNT does not publish a central practical item count, time limit, or pass percentage for NDT Level II on the certification page. Do not invent "20 practical points" or "80 percent practical" as if they were ASNT CBT facts. Those numbers, if they exist, live in the employer's written practice.
A technician who can recite flux leakage theory but cannot find a longitudinal crack with a yoke on a pipe nipple will fail the practical. A technician who can run the yoke but cannot complete the report will also fail. The practical is both technique and documentation.
Job-Specific Exams and Industry Sectors
ASNT's specific exam is currently offered for General Industry or Pressure Equipment. Passing Pressure Equipment does not automatically satisfy a fabricator's ASME Section V procedure quiz, a shipyard NAVSEA practical, or an aerospace prime's process specification. Those are job-specific requirements the written practice or contract can still impose.
Examples:
- A pressure-vessel shop requires a closed-book exam on its UT shear-wave technique sheet, including skip-distance calculations for its exact thickness range.
- A foundry requires a PT specific on its water-washable fluorescent line, including dwell times and emulsifier controls that are not generic textbook values.
- A wind-tower contractor requires VT of galvanized welds to a customer specification that is stricter than the ASNT specific outline.
Hold the ASNT sector that matches the work, then expect the employer to add whatever the written practice still needs.
SNT-TC-1A, CP-189, and ASNT Central Certification Compared
Keep the three schemes distinct when a question mixes them.
| Scheme | Who issues the certificate | Binding force | Written exams | Vision / practical / job-specific |
|---|---|---|---|---|
| SNT-TC-1A employer program | The employer | Recommended practice implemented by a written practice | Employer, or employer-accepted third party (including ASNT) | Employer |
| CP-189 employer program | The employer | Standard; less optional language | As the standard and written practice require | Employer |
| ASNT NDT Level II central certification | ASNT Certification Services | Program document plus public eligibility/exam rules | ASNT general + specific CBT | Employer, to finish certification |
You can hold an ASNT digital badge and an employer certification. You can also hold an ASNT badge and still be unauthorized to inspect for a second employer whose written practice has not yet administered its own vision and practical. Certification is not a passport that every quality manager must stamp without reading.
Realistic Shop Scenarios
Scenario 1 — Badge without eyes. Maya passes ASNT UT general and specific on a Tuesday. Wednesday she reports to a new employer. The Responsible Level III will not let her sign reports until she demonstrates Jaeger J-1 or equivalent and completes the shop UT practical on the company's calibration blocks. The ASNT badge is necessary; it is not sufficient.
Scenario 2 — Two employers. Luis inspects for Contractor A under A's written practice and is loaned to Plant B for a turnaround. Plant B's CP-189 program requires its own practical on Plant B procedures. A's practical does not transfer unless B's written practice says it does. Luis schedules B's practical before he stamps B's isometric drawings.
Scenario 3 — Color contrast for PT. A fluorescent PT line uses a yellow-green indication on a dark field. The written practice requires color-contrast discrimination for PT. A candidate who passed ASNT PT CBT but cannot demonstrate that contrast is not finished under that practice. This is an employer vision rule, not an ASNT-published acuity number.
Scenario 4 — Job-specific still required. A Pressure Equipment specific exam does not list the fabricator's exact acceptance table. The written practice still requires a job-specific exam on that table. ASNT warned employers to check whether program exams meet their requirements; this employer decided they do not fully meet them, so the extra paper stays.
What to Carry into the Written Exam and into the Shop
On the ASNT papers, if a question asks who finishes certification, the answer is the employer acting through the written practice. If a question asks whether ASNT publishes a Jaeger value as the official CBT vision score, the accurate statement is that typical SNT-TC-1A / CP-189 written practices use Jaeger J-1 or equivalent and color contrast as required. If a question asks whether passing general and specific lets you skip the practical, the answer is no.
In the shop, keep a packet: current vision record, practical score sheet, written-practice revision, and the ASNT digital badge. Auditors ask for the packet, not for a memory of your Pearson VUE confirmation number.
Who is responsible for the visual acuity, practical, and job-specific examinations needed to finish ASNT NDT Level II certification?
Which near-vision statement is accurate for ASNT NDT Level II candidates?
After a candidate passes the ASNT NDT Level II general and specific computer-based exams, which statement is correct?