- Level 2 and Level 3 ETT exams contain 100 multiple-choice questions; Level 4 has 65, all within a 2-hour window.
- Component Testing (Domain 3) accounts for 55% of the Level 2 exam - mastering it is non-negotiable for passing.
- You need a scaled score of 410 out of 500 to pass; formulae and an onscreen scientific calculator are provided.
- No external references are permitted - every formula, table, and standard you need is supplied on-screen.
What the ETT Exam Actually Looks Like
The NETA Electrical Testing Technician (ETT) exam is a closed-book, computer-based multiple-choice exam administered through Pearson VUE. At Levels 2 and 3, candidates face 100 questions in 120 minutes. At Level 4, the question count drops to 65 within that same two-hour window, reflecting a narrower but deeper scope. Every question is multiple-choice - no drag-and-drop, no simulation, no short answer.
What that timing math tells you is significant: at Level 2, you have roughly 72 seconds per question. That is enough time to read carefully and compute a straightforward calculation, but not enough to rederive a formula from scratch or second-guess yourself repeatedly. Confident recall and practiced problem-solving are the two skills the exam is ultimately testing.
The passing score is 410 on a 500-point scale. Because that is a scaled score rather than a raw percentage, individual question difficulty affects final scoring. This is exactly why targeted practice - especially on high-weight domains - matters more than simply reviewing everything equally. If you want to understand the full scope of difficulty involved, the How Hard Is the ETT Exam? Complete Difficulty Guide 2026 breaks down what trips up most candidates.
Domain-by-Domain Question Breakdown
The Level 2 exam is organized into four domains, each weighted differently. Knowing those weights tells you exactly where to concentrate your practice question efforts.
| Domain | Topic Area | Weight | Approx. Questions (Level 2, 100 total) |
|---|---|---|---|
| Domain 1 | Safety | 15% | ~15 questions |
| Domain 2 | Electrical Testing Fundamentals and Theory | 25% | ~25 questions |
| Domain 3 | Component Testing | 55% | ~55 questions |
| Domain 4 | Systems and Commissioning | 5% | ~5 questions |
The implication is stark: if you score perfectly on Domain 4 and fail Domain 3, you cannot pass the exam. Conversely, a solid performance on Component Testing alone can carry a candidate over the 410-point threshold even with moderate results elsewhere. For a full breakdown of how each domain is structured, see the ETT Exam Domains 2026: Complete Guide to All 4 Content Areas.
Domain 1: Safety (15%)
Approximately 15 questions. Safety content on the ETT draws heavily from NFPA 70E and OSHA standards as they apply to electrical testing work. Expect questions on:
- Arc flash boundaries, incident energy analysis, and PPE selection
- Lockout/tagout procedures specific to test environments
- Safe work practices when energized testing cannot be avoided
- Hazardous energy control and grounding during testing
Domain 2: Electrical Testing Fundamentals and Theory (25%)
Approximately 25 questions. This is the theoretical backbone of the exam - and the domain where calculation-based questions are most concentrated. Candidates should be prepared for:
- Ohm's Law applications, power formulas, and circuit analysis
- AC versus DC theory, impedance, and power factor concepts
- Instrument calibration, measurement uncertainty, and test equipment selection
- Insulation resistance principles, dielectric absorption ratios, and polarization index interpretation
For a deep dive into Domain 2 specifically, the ETT Domain 2: Electrical Testing Fundamentals and Theory (25%) - Complete Study Guide 2026 covers every major topic tested at this level.
Inside the 55%: Component Testing Questions
Domain 3 is the ETT exam. At 55 out of 100 questions at Level 2, it determines whether you pass or fail more than any other single factor. Component Testing covers the hands-on work that electrical testing technicians perform daily: verifying that transformers, circuit breakers, cables, switchgear, motors, and protective relays meet specification before and after energization.
Domain 3: Component Testing (55%) - High-Yield Topics
This domain tests your ability to select the right test, apply it correctly, interpret results, and compare them to acceptance criteria. Core topic clusters include:
- Transformers: Turns ratio testing, winding resistance, insulation resistance, power factor/dissipation factor, dissolved gas analysis interpretation
- Circuit Breakers: Contact resistance, timing tests, minimum pick-up current, insulation resistance across open contacts
- Cables and Splices: High-potential testing (DC and AC), very low frequency (VLF) testing, insulation resistance, shield/continuity verification
- Rotating Machinery: Insulation resistance, polarization index, winding resistance, surge testing concepts
- Protective Relays: Pickup and timing tests, functional verification, coordination principles
- Grounding Systems: Fall-of-potential testing, soil resistivity measurements, ground resistance interpretation
Questions in this domain are not purely recall-based. Many present a test result - a power factor percentage, a contact resistance reading in microhms, a transformer turns ratio - and ask you to determine whether the component passes NETA acceptance criteria, what additional testing is warranted, or what failure mode the reading suggests. This is applied judgment, not memorization.
The ETT Domain 3: Component Testing (55%) - Complete Study Guide 2026 walks through acceptance criteria, test procedures, and the most commonly tested failure modes for each major component type.
Sample Question Types by Domain
Domain 1 - Safety Question Style
Safety questions typically present a scenario: a specific work condition, a piece of equipment in a certain state, or a PPE selection decision. You are rarely asked to define a term in isolation. Instead, expect questions like: "A technician is performing an insulation resistance test on a 15 kV cable. According to NFPA 70E, what is the minimum PPE category required if the equipment has not been verified as electrically safe?" The right answer depends on knowing both the regulation and how it applies to testing-specific contexts - not just general electrical work.
Domain 2 - Theory and Calculation Question Style
Fundamentals questions split roughly between conceptual and computational. Conceptual questions test interpretation: given a polarization index of 1.8 measured on a 480V motor winding, what does this value indicate about insulation condition? Computational questions use the provided formulae: calculate the expected charging current for a cable of given length and capacitance, or determine the power factor from real and apparent power values. Practice with the onscreen calculator format - knowing what formula to apply is only half the work.
Domain 3 - Component Testing Question Style
These are the most varied and most practically demanding questions on the exam. Common formats include: interpreting a test data table and identifying which values are out of specification; selecting the correct test method for a given component and voltage class; or analyzing a before-and-after dataset to determine whether a repair was effective. Many questions also reference specific NETA MTS (Maintenance Testing Specifications) acceptance criteria - knowing the numerical thresholds matters here.
Domain 4 - Systems Question Style
At only 5% of the exam, Systems and Commissioning questions tend to focus on sequencing - what order tests are performed in when commissioning a complete system - and system-level interpretation, such as identifying whether an integrated protection scheme is functioning correctly based on relay test results. For a complete look at this domain, see the ETT Domain 4: Systems and Commissioning (5%) - Complete Study Guide 2026.
What Makes ETT Questions Difficult
Several characteristics make ETT practice questions more demanding than a standard recall quiz:
- Criteria specificity: NETA acceptance criteria vary by equipment type, voltage class, and age of the equipment. A question may hinge on knowing that the threshold for one component is different from a superficially similar component.
- Multi-step reasoning: Some questions require you to identify what a test result means, then determine what action follows - two steps that each require correct knowledge.
- Unit awareness: Contact resistance is measured in microhms. Insulation resistance in megohms. Mixing these up in a calculation is a quick way to select a wrong answer that looks plausible.
- Standard-specific knowledge: The ETT is a NETA certification, and the exam reflects NETA's own standards - particularly the NETA MTS. Candidates who study from generic electrical engineering texts without grounding their knowledge in NETA-specific procedures and criteria will find the questions unexpectedly specific.
For a broader look at candidate experience and difficulty factors, ETT Pass Rate 2026: What the Data Shows provides qualitative context on where candidates typically struggle.
Key Takeaway
Time your practice sessions. At 72 seconds per question for Level 2, pacing discipline built during practice directly translates to exam performance. Flag difficult questions and return rather than dwelling - the clock does not pause.
A Domain-Weighted Practice Schedule
Because the domains are so unevenly weighted, a flat study schedule - equal time on all four areas - is an inefficient approach. The schedule below maps study effort directly to exam weight, using spaced repetition within Domain 3 to reinforce the highest-value material over multiple weeks.
Foundation: Safety + Fundamentals
- Complete the ETT Domain 1: Safety (15%) - Complete Study Guide 2026 and work 30-40 safety practice questions
- Begin Domain 2 theory: Ohm's Law, power formulas, AC/DC principles
- Practice onscreen calculator use for all computational problems
Domain 2 Completion + Domain 3 First Pass
- Finish Fundamentals topics: insulation resistance theory, polarization index, dielectric absorption
- Begin Component Testing with transformers and circuit breakers - the two most heavily tested equipment types
- Run 25-question timed Domain 2 practice sets; track missed questions by topic
Domain 3 Intensive: Cables, Relays, Rotating Machinery
- Focus on cable testing methods (VLF, DC hipot, IR) and NETA acceptance criteria
- Study protective relay pickup and timing tests
- Run 50-question full Domain 3 practice sets; target above the passing threshold before moving on
Full Exam Simulation + Weak Area Review
- Take two full 100-question timed practice exams at ETT Exam Prep practice tests
- Review all missed questions; re-study any Domain 3 subtopic below 70% accuracy
- Light review of Domain 4 Systems topics; do not sacrifice Domain 3 time for a 5% domain
For a more detailed study approach, the ETT Study Guide 2026: How to Pass on Your First Attempt covers resource selection, NETA standard navigation, and first-attempt strategy in full.
Registration, Fees, and Exam Logistics
Before you can sit for any ETT exam level, eligibility must be confirmed through NETA. Candidates must be employed by a NETA Accredited Company - you cannot register as an independent or through a non-accredited employer. Each level also has specific safety training, electrical training, and documented experience requirements. For Level 2, candidates must hold Level 1 certification, have at least two years of relevant experience, and meet specified training hour requirements.
Once eligibility is confirmed, the exam is scheduled through Pearson VUE. Specific public exam fees are not disclosed on accessible NETA or Pearson VUE pages, but scheduling, rescheduling, cancellation, and practice exam fees may all apply - so candidates should verify current fee structures directly with NETA before committing to a test date. For a broader cost picture, see the ETT Certification Cost 2026: Complete Pricing Breakdown.
On exam day, the testing environment is a standard Pearson VUE testing center. No personal materials enter the testing room. The onscreen scientific calculator and any provided formulae sheets are your only tools. Practicing under those same conditions - no personal notes, timer running - is the most realistic preparation available. Run your full practice tests at ETT Exam Prep to replicate exam conditions as closely as possible.
If you are still weighing whether to pursue the certification at all, the Is the ETT Certification Worth It? Complete ROI Analysis 2026 and ETT Salary Guide 2026: Complete Earnings Analysis offer qualitative and market-based perspectives on the credential's value.
Frequently Asked Questions
The ETT Level 2 exam contains 100 multiple-choice questions, as does the Level 3 exam. The Level 4 exam has 65 multiple-choice questions. All levels are administered within a 2-hour time limit through Pearson VUE testing centers.
The passing score is 410 on a 500-point scale. This is a scaled score, meaning individual question difficulty influences how raw correct answers translate into the final reported score. There is no publicly disclosed pass/fail percentage equivalent.
No. The ETT exam is fully closed-book and no external references are permitted. NETA provides the necessary formulae and an onscreen scientific calculator within the exam software. You should practice exclusively using provided tools during your preparation.
At Level 2, Component Testing (Domain 3) carries 55% of the exam weight and should receive the majority of your study time. Build your foundation in Fundamentals and Theory (Domain 2) first since that knowledge underpins Domain 3, then shift the bulk of your practice effort to component-specific testing procedures and NETA acceptance criteria.
High-quality ETT practice questions mirror the actual exam's scenario-based, multiple-choice format and test the same domains at proportional weights. Look for practice sets that require you to apply NETA acceptance criteria, interpret test results, and select appropriate test methods - not just recall definitions. Timed full-length sets are the most realistic preparation available before exam day.
Ready to Start Practicing?
ETT Exam Prep's practice questions are built around the exact four domains and NETA-specific content tested on exam day - including full-length timed sets that simulate the 100-question, 2-hour format. Find out where you stand before you sit for the real thing.
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