- The Passing Score Number, Exactly
- How the 80-Question Format Works
- Which Domains Carry the Most Weight
- Closed-Book Rules and Code References
- Registration, Fees, and Scheduling With CMS
- Building a Study Plan Around 56 Correct Answers
- The NASCLA Substitution Path
- What Happens After You Hit 70%
- Frequently Asked Questions
- You need 56 correct answers out of 80 questions - exactly 70% - to pass the NV-B trade exam.
- PSI gives you 180 minutes, which averages out to just over two minutes per question.
- Concrete, Metals, and General Code, Plan Reading, and Estimating are tied as the largest domains.
- The exam is closed book except for code references specifically authorized by PSI's current content outline.
The Passing Score Number, Exactly
There's no ambiguity here, and that's a relief for anyone tired of vague exam prep advice. The Nevada State Contractors Board, through its testing vendor PSI, sets a single fixed threshold for the Class B trade exam: 56 correct answers out of 80 total questions, which equals 70%. There's no curve, no scaled scoring, and no partial credit for questions you leave blank. You either land 56 or more correct responses, or you sit for a retake.
This flat percentage matters because it tells you precisely how much margin for error you're working with. Out of 80 questions, you can miss 24 and still pass. That's a meaningful cushion, but only if your misses are spread thin across domains rather than concentrated in one or two areas where you have a genuine knowledge gap. If you want a deeper breakdown of how candidates typically perform against this bar, the NV-B Pass Rate 2026 data breakdown is worth reading alongside this article.
How the 80-Question Format Works
The Class B trade exam is administered entirely through PSI as a closed-book, multiple-choice test. You get 180 minutes for 80 questions, which breaks down to roughly two minutes and fifteen seconds per question if you use the full window evenly. In practice, most candidates move faster through straightforward code-and-definition questions and slow down on calculation-heavy items involving takeoffs, material quantities, or estimating logic.
Because every question counts equally toward your 56-correct threshold, there's no strategic advantage to skipping around based on point value - every item is worth the same fraction of your final score. That simplifies pacing strategy considerably: work through the exam in order, flag anything you're unsure about, and return to flagged items with whatever time remains rather than burning ten minutes agonizing over a single question early on.
Key Takeaway
With 180 minutes and 80 questions, budget no more than three minutes on any single item during your first pass. Flag and move on - you can always return if time permits.
Which Domains Carry the Most Weight
The Class B trade exam draws from eleven content areas, but they are not weighted equally. According to the Board's own classification, Concrete, Metals, and General Code, Plan Reading, and Estimating are tied as the largest domains on the exam. That means a disproportionate share of your 80 questions will come from these three areas, and neglecting any one of them puts your 56-correct target at real risk.
The full domain list looks like this:
Domain 2: Concrete
One of the three largest domains. Expect questions on mix design basics, reinforcement placement, formwork, curing, and slab-on-grade practices commonly encountered on Nevada commercial and residential building sites.
- Know reinforcement spacing and cover requirements
- Understand curing methods appropriate to Nevada's arid climate
Domain 4: Metals
Also one of the three tied-largest domains. Structural steel connections, fastener types, and metal framing components show up frequently.
- Distinguish structural vs. cold-formed metal framing applications
- Review common connection and anchorage methods
Domain 10: General Code, Plan Reading, and Estimating
The third tied-largest domain, and arguably the most cross-cutting since it touches every trade area covered elsewhere on the exam.
- Practice reading plan sets and identifying scope discrepancies
- Work through quantity takeoff and estimating math until it's automatic
The remaining eight domains - Site Work, Masonry, Carpentry, Thermal and Moisture Protection, Doors and Windows, Drywall and Finishes, Safety, and Nevada One Call - still appear on the exam and can't be ignored, but they don't individually carry the same question volume as the top three. For a complete walkthrough of all eleven areas with study guidance for each, see the NV-B Exam Domains 2026 complete guide.
Closed-Book Rules and Code References
The Board classifies the Class B trade exam as closed book, with one important exception: code references expressly authorized by the current PSI content outline may be permitted in the testing room. This isn't a blanket "bring any code book you like" policy - it's a specific, limited allowance tied to whatever PSI's outline states for the exam version you're scheduled to take.
This detail trips up candidates who assume the exam works like some open-book trade tests where you can bring annotated tabs and sticky notes throughout a full reference library. For NV-B, you're expected to have memorized most concepts cold, with the permitted reference material serving only as a lookup aid for specific code sections rather than a crutch for entire topics. Always confirm the current authorized materials list directly with PSI before test day, since content outlines are updated periodically.
Registration, Fees, and Scheduling With CMS
Understanding the passing score in isolation isn't enough - you need to know how the exam fits into the broader licensing process, because scheduling decisions affect your prep timeline. PSI charges $95 for the trade exam alone, or $140 if you schedule the trade exam and the CMS (Contractor's Management Survey) together. Bundling saves money if you're ready for both, but only do so if you've genuinely prepared for the management-side content as well as the trade content.
Beyond the exam fees themselves, the Nevada State Contractors Board charges a $300 application fee and a $600 biennial license fee once you're approved. Licensure also requires Board approval and a qualifying individual with four years of relevant experience earned within the prior 15 years, though approved education can substitute for up to three of those years. For the complete cost picture across every stage of licensing, see the NV-B Certification Cost 2026 pricing breakdown, and for a full eligibility rundown, check the NV-B Requirements 2026 eligibility guide.
| Item | Cost / Requirement |
|---|---|
| Trade exam only (PSI) | $95 |
| Trade exam + CMS bundled (PSI) | $140 |
| Board application fee | $300 |
| Biennial license fee | $600 |
| Passing score | 56 of 80 correct (70%) |
| Time allowed | 180 minutes |
For current testing windows and how far in advance you should register, review the NV-B Exam Dates 2026 testing windows and scheduling guide.
Building a Study Plan Around 56 Correct Answers
Once you know your target is 56 correct answers, you can reverse-engineer a study plan that spends the most hours where the most questions live. Since Concrete, Metals, and General Code, Plan Reading, and Estimating are tied for the heaviest domain weight, those three deserve the largest blocks of study time - not equal time with every other domain.
Concrete and Metals Fundamentals
- Work through reinforcement, formwork, and curing scenarios for Concrete
- Study structural connections and framing types for Metals
- Take domain-specific practice sets and log missed questions
Plan Reading and Estimating
- Practice takeoff math until it's fast and error-free
- Review common plan symbols and specification cross-referencing
Remaining Eight Domains
- Cover Site Work, Masonry, Carpentry, Thermal/Moisture, Doors/Windows, Drywall, Safety, and Nevada One Call
- Spend less time per domain here but don't skip any entirely
Full Timed Practice Exams
- Simulate the 180-minute, 80-question format under real conditions
- Target 80%+ accuracy consistently before your scheduled date
This kind of weighted scheduling is more useful than a generic study calendar because it's tied directly to how the actual exam is built. For a more detailed first-attempt strategy, the NV-B Study Guide 2026 first-attempt strategy expands on each phase, and if you're still calibrating how much total prep time you need, How Hard Is the NV-B Exam? difficulty guide gives useful context on where candidates typically struggle. You can also run full-length timed simulations on the main practice test platform to see how close you are to the 56-correct threshold before test day.
The NASCLA Substitution Path
If you already hold a qualifying score on the NASCLA Accredited Examination for Commercial General Building Contractors, you may be able to substitute that score in place of sitting for the Class B trade exam. This is a meaningful shortcut for contractors who've already tested through NASCLA in another jurisdiction and don't want to repeat trade-content testing in Nevada.
If you're weighing whether the NASCLA route or the standard PSI trade exam path makes more sense for your situation, factor in your existing experience documentation and how the four-years-of-experience-within-15-years rule applies to your background.
What Happens After You Hit 70%
Passing the trade exam is a milestone, not the finish line. Licensure still requires Board approval, successful completion of the CMS, and confirmation that your qualifying individual meets the experience threshold. Class B licensure covers buildings requiring more than two unrelated building trades - meaning it's built for general contractors overseeing multi-trade projects rather than single-specialty work. Plumbing, electrical, and similar specialty trades generally require their own separate classifications, so passing the Class B exam doesn't authorize standalone specialty work outside a qualifying general-building project.
Once licensed, remember that Nevada contractor licenses are biennial, with recurring fees tied to that renewal cycle. If you're trying to determine whether the investment of time and the $300/$600 fee structure pays off relative to the work you can perform, the Is the NV-B Certification Worth It? ROI analysis and NV-B Salary Guide 2026 earnings analysis both dig into that question from different angles. For a fast, printable reference of core facts while you finalize prep, the NV-B Cheat Sheet 2026 one-page review is a convenient last-week tool, and you can keep testing your readiness with additional timed sets on the practice exam platform right up until your scheduled date.
Frequently Asked Questions
You need 56 correct answers out of 80 total questions, which equals 70%. This is a fixed threshold with no curve.
PSI allows 180 minutes to complete all 80 multiple-choice questions, which averages to a little over two minutes per question.
It's classified as closed book, except for code references expressly authorized by the current PSI content outline. Confirm exactly what's permitted with PSI before test day.
Concrete, Metals, and General Code, Plan Reading, and Estimating are tied as the largest domains, so they should get the most study hours relative to the other eight domains.
No. A qualifying NASCLA Accredited Examination score can replace the Class B trade exam, but it does not replace the CMS, which you must still complete separately.