100+ Free ITC Thermographer Level III Practice Questions

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Question 1

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A Level III thermographer is developing a written certification program for their company under ASNT SNT-TC-1A. Which document does SNT-TC-1A require the employer to produce?

A nationally standardized written practice approved by a third-party auditor

A written practice that establishes requirements for qualification and certification of NDT personnel

A copy of ASNT CP-189 adopted without modification as the employer practice

A training syllabus submitted to ASNT for pre-approval before any certification can begin

to track

2026 Statistics

Key Facts: ITC Thermographer Level III Exam

Level III

Highest Certification Level

ITC / Infraspection

SNT-TC-1A + CP-189

Key Qualification Standards

ASNT

ISO 18436-7

International Condition Monitoring Standard

ISO TC 108

NETA ATS-2023

Electrical Thermal Anomaly Criteria

Table 100.18

5 years

CP-189 Recertification Cycle

ASNT CP-189

40%

Minimum Load per ASTM E1934

ASTM E1934

The Certified Infrared Thermographer Level III is the highest certification level in the ITC and Infraspection Institute thermography programs. Level III thermographers manage employer-based qualification programs under ASNT SNT-TC-1A or CP-189, develop written procedures for electrical (ASTM E1934, NETA ATS-2023), building envelope (ASTM E1186), photovoltaic (ASTM E2582), and transformer (IEEE C57.127) inspections, and hold overall program authority. The role increasingly includes ROI financial justification, advanced camera selection, drone/UAS integration, and expert-witness testimony in litigation.

Sample ITC Thermographer Level III Practice Questions

Try these sample questions to test your ITC Thermographer Level III exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A Level III thermographer is developing a written certification program for their company under ASNT SNT-TC-1A. Which document does SNT-TC-1A require the employer to produce?

A.A nationally standardized written practice approved by a third-party auditor

B.A written practice that establishes requirements for qualification and certification of NDT personnel

C.A copy of ASNT CP-189 adopted without modification as the employer practice

D.A training syllabus submitted to ASNT for pre-approval before any certification can begin

Explanation: SNT-TC-1A is a recommended practice that places the responsibility for developing a written practice on the employer. The employer's written practice must define the requirements for qualification and certification of personnel in each NDT method used at that facility. SNT-TC-1A does not require third-party approval or submission to ASNT before use.

2What is the primary distinction between ASNT SNT-TC-1A and ASNT CP-189 regarding thermographer certification?

A.SNT-TC-1A specifies exact hour requirements for training; CP-189 leaves hours to the employer

B.SNT-TC-1A is a recommended practice allowing employer flexibility; CP-189 is a standard with mandatory, prescriptive requirements

C.CP-189 applies only to IR thermography; SNT-TC-1A applies to all NDT methods except IR

D.Both documents are legally binding on all U.S. employers that perform infrared inspections

Explanation: SNT-TC-1A is titled a 'Recommended Practice,' giving employers flexibility in setting training hours and experience requirements. ASNT CP-189 is a standard with prescriptive minimum training hours, experience, and examination requirements that must be met exactly. The choice between them has contractual and legal implications for any thermography program.

3ISO 18436-7 is the international standard specifically covering thermographer certification for condition monitoring. Which organization manages this standard?

A.Infrared Training Center (ITC)

B.ASNT (American Society for Nondestructive Testing)

C.ISO (International Organization for Standardization) through its machinery condition monitoring technical committee

D.NETA (InterNational Electrical Testing Association)

Explanation: ISO 18436-7 is maintained by ISO/TC 108 (Mechanical vibration, shock and condition monitoring), specifically SC 5, which covers condition monitoring and diagnostics of machines. The '-7' designates thermography as the method. It sets requirements for the body certifying thermographers and for the qualification of personnel in condition monitoring using infrared thermography.

4Under ISO 18436-7, a Category III thermographer's primary responsibility in a certification program is best described as:

A.Performing field scans under the direct supervision of a Category II

B.Reviewing and approving reports written by Category I and II thermographers, and managing the thermography program

C.Calibrating infrared cameras according to manufacturer specifications only

D.Writing insurance appraisals based on thermographic findings

Explanation: ISO 18436-7 Category III (equivalent to Level III in ASNT terminology) is responsible for program management: establishing written procedures, auditing Category I and II performance, reviewing and approving reports, and setting the technical direction of the thermography program. Category III personnel are the most experienced and hold the highest certification level.

5When auditing a Level I thermographer's performance, a Level III reviewer identifies that the technician's written reports consistently omit ambient temperature at time of scan. The most appropriate corrective action is:

A.Revoke the Level I's certification immediately and report to the certifying body

B.Update the written procedure to require ambient temperature documentation, then retrain and monitor the Level I

C.Accept the reports as-is because ambient temperature only matters for building envelope surveys

D.Have a Level II re-scan all the same equipment to establish the correct baseline

Explanation: A Level III's audit function includes identifying procedural gaps and training deficiencies. The correct action is to close the gap systematically: update the written procedure to formalize the requirement, provide targeted training to the affected technician, and monitor subsequent reports. Ambient temperature is required on all thermal inspection reports because it directly affects heat transfer calculations and delta-T interpretation.

6ASTM E1934 applies to which thermographic inspection application?

A.Photovoltaic module inspection

B.Building envelope air leakage and moisture surveys

C.Electrical system inspections

D.Condition monitoring of rotating machinery

Explanation: ASTM E1934 is the 'Standard Guide for Examining Electrical and Mechanical Equipment with Infrared Thermography.' It covers infrared inspection of electrical equipment — switchgear, transformers, motor control centers, connections, and related components. It addresses viewing angles, load requirements, and thermal anomaly categorization for electrical systems.

7ASTM E1186 is the applicable standard when performing infrared thermography on:

A.Transformer oil-filled bushings

B.Building envelope to detect air leakage pathways

C.Photovoltaic arrays in utility-scale solar farms

D.Pipeline cathodic protection systems

Explanation: ASTM E1186 covers 'Air Leakage Site Detection in Building Envelopes and Air Retarder Systems.' Infrared thermography is used in conjunction with pressure differential (blower door) testing to visualize air infiltration and exfiltration pathways in building envelopes. The standard defines the conditions required for reliable IR survey results.

8ASTM E2582 provides guidance for infrared thermographic inspection of:

A.Flat-roof membrane systems for moisture intrusion

B.Photovoltaic modules and arrays

C.Electrical panel boards and switchgear

D.Building insulation continuity in residential walls

Explanation: ASTM E2582 is the 'Standard Practice for Infrared Flash/Thermography of Composite Panels and Repair Patches Used in Aerospace Applications' — however, in the thermography community and within PV inspection contexts, ASTM E2582 is specifically referenced as the guide for inspecting photovoltaic modules. It addresses active (flash) thermography of composite and PV panels to detect delamination, cell failures, and other anomalies.

9The NETA ATS-2023 Table 100.18 provides thermographic acceptance criteria for electrical equipment. What does the table primarily define?

A.Maximum allowable camera distance for valid electrical inspections

B.Temperature difference thresholds (delta-T) between similar components or reference points that indicate action priority

C.Minimum camera resolution required for electrical panel thermography

D.Emissivity values for common electrical conductors

Explanation: NETA ATS-2023 Table 100.18 establishes thermal anomaly severity criteria based on temperature differences (delta-T). It categorizes anomalies as requiring priority action, immediate correction, or monitoring depending on the magnitude of the temperature rise above a reference point (similar conductor at similar load or ambient). These criteria guide thermographers and maintenance engineers on urgency of corrective action.

10IEEE C57.127 provides guidance for infrared thermographic inspection of which type of electrical equipment?

A.Motor control centers and variable frequency drives

B.Oil-filled power transformers and their components

C.Dry-type distribution transformers only

D.High-voltage overhead transmission line insulators

Explanation: IEEE C57.127 is the 'IEEE Guide for the Detection and Location of Acoustic Emissions from Partial Discharges in Oil-Immersed Power Transformers and Reactors.' More broadly, C57 series standards address power transformers, and thermographic inspection guidance within the C57 framework focuses on oil-filled transformers — their bushings, cooling radiators, tap changer contacts, and tank hot spots.

About the ITC Thermographer Level III Exam

Level III certification for infrared thermographers covering program management, procedure development, auditing of Level I and II personnel, standards interpretation, and capital equipment selection.

Questions

100 scored questions

Time Limit

Varies by program

Passing Score

Not publicly disclosed

Exam Fee

Contact ITC or Infraspection Institute (Infrared Training Center (ITC) / Infraspection Institute)

ITC Thermographer Level III Exam Content Outline

~20%

Certification Program Administration

SNT-TC-1A vs CP-189, written practice development, ISO 18436-7, auditing Level I and II personnel, record-keeping, and recertification.

~20%

Standards and Codes

ASTM E1934 (electrical), ASTM E1186 (building envelope), ASTM E2582 (PV), NETA ATS-2023 Table 100.18, IEEE C57.127 (transformers), NFPA 70E.

~15%

Training Development

Developing Level I and II training curricula, examination development, practical evaluation, and competency standards.

~15%

Financial Justification and Capital Equipment

ROI calculations, management presentations, camera selection (NETD, resolution, MWIR vs. LWIR, cooled vs. uncooled), IR windows, calibration.

~15%

Thermography Fundamentals

Stefan-Boltzmann law, Wien's displacement law, Kirchhoff's law, emissivity, reflected apparent temperature, atmospheric correction, specular reflection.

~10%

Report Review

Reviewing Level II reports for technical accuracy, identifying errors in emissivity, load documentation, finding classification, and anomaly interpretation.

~5%

Expert Witness

Federal Rule 702, expert witness obligations, objectivity, cross-examination, limitations of thermographic evidence in litigation.

~5%

Technology Trends

Drone/UAS thermography (FAA Part 107), continuous online monitoring, AI-assisted anomaly detection, GIS switchgear limitations.

How to Pass the ITC Thermographer Level III Exam

What You Need to Know

Passing score: Not publicly disclosed
Exam length: 100 questions
Time limit: Varies by program
Exam fee: Contact ITC or Infraspection Institute

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

ITC Thermographer Level III Study Tips from Top Performers

1Master the difference between SNT-TC-1A (employer flexibility) and CP-189 (mandatory prescriptive requirements) — this distinction appears throughout the exam

2Know NETA ATS-2023 Table 100.18 delta-T thresholds cold — memorize the general action categories (no action, monitor, schedule repair, repair immediately)

3Understand why emissivity and reflected apparent temperature matter for measurement accuracy — the exam tests when errors occur and in which direction

4Practice ROI calculations: benefits minus costs divided by costs, and be able to identify which components belong in numerator vs. denominator

5Know Wien's displacement law for camera selection: high-temperature targets use MWIR (3–5 µm); near-ambient targets use LWIR (8–14 µm)

Frequently Asked Questions

What does a Certified Infrared Thermographer Level III do?

A Level III thermographer manages the employer's thermography qualification program, writes and approves inspection procedures, audits Level I and II personnel, reviews and approves reports, selects capital equipment, and may serve as an expert witness. They have program authority over all thermographic activities within the organization.

What standards are covered in the Level III program?

Level III candidates must know ASNT SNT-TC-1A and CP-189 (personnel qualification), ISO 18436-7 (condition monitoring thermography), ASTM E1934 (electrical inspections), ASTM E1186 (building envelope), ASTM E2582 (photovoltaic modules), NETA ATS-2023 Table 100.18 (electrical thermal anomaly criteria), and IEEE C57.127 (transformers).

What is the difference between SNT-TC-1A and CP-189?

ASNT SNT-TC-1A is a recommended practice giving employers flexibility to define their own training hours and experience requirements in a written practice. ASNT CP-189 is a standard with mandatory, prescriptive minimum training hours, experience, and examination requirements that must be followed exactly. The choice between them depends on employer preference and contractual requirements.

How long should I study for the Level III thermographer exam?

Most Level III candidates have already completed Level I and II training (typically 40–80+ hours). Level III preparation typically requires 40–80 additional study hours focusing on program management, standards interpretation, procedure development, financial justification, and advanced technical topics beyond Level II content.

What is NETA ATS-2023 Table 100.18?

NETA ATS-2023 Table 100.18 provides thermal anomaly acceptance criteria for electrical equipment based on the temperature difference (delta-T) between a suspect component and a similar reference component at similar load. It categorizes findings into severity levels (no action, monitor, repair as scheduled, repair immediately) to guide maintenance prioritization.