- NV-B is the Nevada Class B trade exam administered by PSI, covering buildings requiring more than two unrelated trades.
- The exam has 80 multiple-choice questions, a 180-minute limit, and a 56-correct (70%) passing score.
- PSI charges $95 alone or $140 when paired with the CMS at the same sitting.
- A qualifying NASCLA Commercial General Building score can replace the trade exam but not the CMS.
What Is the NV-B Certification?
The NV-B exam is the Nevada State Contractors Board's General Building Contractor Class B trade examination. It is administered through PSI and functions as the technical knowledge test that verifies a contractor understands the building trades broadly enough to supervise construction projects involving more than two unrelated building trades. This is not a narrow specialty exam - it's a generalist credential built for contractors who coordinate framing, concrete, masonry, drywall, and finish work under one license rather than pulling separate specialty classifications for each trade.
If you're researching this credential from scratch, it helps to first understand the basics before diving into study materials. Our companion piece on What Is NV-B? breaks down the terminology, and NV-B Meaning clarifies exactly what the acronym refers to in the Nevada licensing context so you don't confuse it with unrelated credentials that share the same letters.
Registration, Fees, and Scheduling with PSI
PSI handles exam scheduling and delivery for the Nevada State Contractors Board. Candidates pay $95 to sit for a single exam, or $140 if they schedule the Class B trade exam together with the Contractors Management Survey (CMS) in the same appointment window. Bundling the two when your eligibility is already confirmed can save a separate scheduling trip, but it also means you need to be equally prepared for both components on exam day.
Because fees, scheduling windows, and the broader financial picture (application and licensing costs on top of exam fees) all factor into planning, it's worth reviewing NV-B Certification Cost 2026: Complete Pricing Breakdown before you book a date. For the testing calendar itself, including how far in advance to register, see NV-B Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Key Takeaway
Schedule the trade exam and CMS together only after you've confirmed your qualifying individual's experience documentation is in order - rescheduling either piece separately adds cost and delay.
Exam Format and Scoring
The NV-B trade exam is a closed-book, multiple-choice test with a fixed structure:
- 80 questions, all multiple-choice
- 180 minutes total testing time
- 56 correct answers required to pass, equal to 70%
The Board treats the exam as closed book, with one notable exception: code references that are expressly authorized by the current PSI content outline for this exam. That means you cannot bring in arbitrary reference material, but a specific, outline-approved code reference may be permitted at the test center. Always confirm the current allowed references against the official PSI candidate information bulletin before test day, since outlines are updated periodically.
For a full breakdown of how the 70% threshold is calculated and what it means in practice, read NV-B Passing Score 2026: Exactly What You Need to Pass. If you're trying to gauge whether the format and time pressure will be challenging for you specifically, How Hard Is the NV-B Exam? Complete Difficulty Guide 2026 walks through the factors that typically trip up candidates.
The 11 NV-B Exam Domains
The trade exam draws its 80 questions from eleven content domains. Three of them - Concrete, Metals, and General Code, Plan Reading, and Estimating - are tied as the largest domains on the exam, meaning they collectively represent the greatest share of test questions. That makes them priority areas for study time, but every domain still needs coverage since the exam samples broadly across all eleven.
Domain 1: Site Work
Covers grading, excavation, and site preparation concepts a general building contractor must understand before construction begins.
- Site layout and staking fundamentals
Domain 2: Concrete
One of the three tied largest domains. Expect questions on formwork, reinforcement, curing, and concrete placement standards.
- Reinforcement placement and slab requirements
Domain 3: Masonry
Covers block and brick construction methods, mortar types, and masonry detailing relevant to general building projects.
- Wall assembly and bearing considerations
Domain 4: Metals
Also tied for largest domain. Structural steel, connections, and metal framing components fall here.
- Fastening and structural connection basics
Domain 5: Carpentry
Framing systems, rough and finish carpentry practices used across Class B projects.
- Framing sequences and load paths
Domain 6: Thermal and Moisture Protection
Insulation, waterproofing, and building envelope questions related to keeping structures weather-tight.
- Vapor barrier and insulation placement
Domain 7: Doors and Windows
Installation standards and specification knowledge for openings in the building envelope.
- Rough opening and flashing details
Domain 8: Drywall and Finishes
Interior finish work including drywall installation and finish material standards.
- Joint treatment and finish schedules
Domain 9: Safety
Jobsite safety principles a Class B contractor must apply while supervising multi-trade work.
- Hazard recognition on active sites
Domain 10: General Code, Plan Reading, and Estimating
Tied as one of the largest domains. This area blends code application, reading construction drawings, and estimating quantities and costs.
- Plan interpretation and takeoff basics
Domain 11: Nevada One Call
Covers Nevada's utility notification requirements before excavation, a state-specific compliance topic.
- Notification timing and requirements
For a deeper walkthrough of every domain, including how questions are typically phrased and where candidates lose the most points, see NV-B Exam Domains 2026: Complete Guide to All 11 Content Areas.
Eligibility and the Path to Licensure
Passing the trade exam is one piece of a larger licensure process. The Nevada State Contractors Board requires:
- Board approval of the license application
- Passing the CMS (Contractors Management Survey)
- A qualifying individual with four years of relevant experience earned within the prior 15 years
Approved education can substitute for up to three of those four years, which matters if you're coming from a formal construction program rather than pure fieldwork. Once licensed, Nevada contractor licenses operate on a biennial cycle, and the Board charges a $300 application fee plus a $600 biennial license fee - costs that are separate from the PSI exam fees.
Because these requirements interact (education credit, experience timing, application fees, and exam scheduling all have to line up), it's worth mapping out your specific situation against NV-B Requirements 2026: Eligibility, Prerequisites & How to Qualify before you submit anything to the Board.
The NASCLA Exam Alternative
Candidates who already hold a qualifying score on the NASCLA Accredited Examination for Commercial General Building Contractors can use that score in place of the Class B trade exam itself. This is a meaningful shortcut for contractors who've tested in other states using the NASCLA exam and want to bring that credential into Nevada.
However, this substitution has a firm limit: it replaces only the trade exam, not the CMS. You will still need to pass the Contractors Management Survey separately regardless of your NASCLA status. Anyone assuming NASCLA eliminates all testing requirements should double-check this before skipping CMS preparation.
Building an NV-B Study Timeline
Given that Concrete, Metals, and General Code/Plan Reading/Estimating are tied as the exam's largest domains, a study plan should weight early, dedicated blocks toward those three areas before moving into the remaining eight domains. Spacing your review across weeks - revisiting concrete and metals concepts after you've moved on to carpentry or masonry - reinforces retention better than cramming any single domain in one sitting.
Concrete and Metals
- Work through formwork, reinforcement, and curing standards
- Review structural steel connections and fastening principles
General Code, Plan Reading, and Estimating
- Practice reading construction drawings and takeoffs
- Study code application scenarios relevant to Class B scope
Carpentry, Masonry, Site Work
- Review framing sequences and load paths
- Cover site grading and masonry wall assembly
Remaining Domains and Timed Practice
- Cover thermal/moisture protection, doors/windows, drywall, safety, and Nevada One Call
- Run full-length timed practice sets under the 180-minute limit
For a complete, structured version of this approach with more detail on pacing and review cycles, see NV-B Study Guide 2026: How to Pass on Your First Attempt. And if you want a fast reference to keep nearby during final review, bookmark NV-B Cheat Sheet 2026: One-Page Review of Must-Know Facts.
Who Needs the NV-B and Why It Matters
The Class B classification is built for contractors managing projects that touch more than two unrelated building trades - general building construction rather than a single specialty. That includes contractors overseeing residential and light commercial builds where framing, concrete, masonry, and finish trades all come together under one scope of work. If your work is confined to a single specialty like plumbing or electrical, this exam isn't the right classification; the Board requires separate specialty licensing for that kind of work.
Understanding where the license fits into your career path - and whether the licensing investment pays off relative to the projects you can bid - is worth researching before you commit time to exam prep. Is the NV-B Certification Worth It? Complete ROI Analysis 2026 and NV-B Salary Guide 2026: Complete Earnings Analysis both dig into that question from different angles, and NV-B Jobs looks at the kinds of roles and projects this license opens up.
You can also start practicing with realistic questions right now on our NV-B practice test platform, which mirrors the domain weighting and multiple-choice format described above. Working through timed sets on the practice site before your PSI appointment is one of the most direct ways to build familiarity with the 180-minute pacing requirement.
Key Takeaway
Confirm your project scope actually falls under Class B before investing in trade exam prep - specialty-only contractors need a different classification entirely.
Frequently Asked Questions
The exam contains 80 multiple-choice questions with a 180-minute time limit administered through PSI.
You need 56 correct answers out of 80, which equals 70%.
PSI charges $95 for the trade exam alone, or $140 if you schedule the trade exam and the CMS together in one appointment.
Yes, a qualifying score on the NASCLA Accredited Examination for Commercial General Building Contractors can replace the Class B trade exam, but it does not replace the CMS, which you must still pass separately.
No, it's closed book, with one exception: code references that are expressly authorized by the current PSI content outline for this exam may be permitted at the test center.
The qualifying individual needs four years of relevant experience earned within the prior 15 years, though approved education can substitute for up to three of those years.