- The Actual Passing Score for Each UT-CDL Knowledge Test
- How Utah DLD Scores the Test
- Question Breakdown by Exam Domain
- What Happens If You Don't Hit the Score - Fee & Attempt Structure
- Eligibility You Need Before You Even Sit for the Test
- A Domain-Focused Study Timeline
- Core Knowledge Tests at a Glance
- After You Pass: The 180-Day CLP Clock
- Frequently Asked Questions
- The Utah CDL General Knowledge test requires 80% correct out of 50 questions to pass.
- Combination Vehicles has 20 questions; Air Brakes has 25 - both scored closed-book in English.
- The $52 application fee covers two attempts per core test; a second pair costs $26.
- Endorsement testing is separate, at $9 for two attempts per endorsement.
The Actual Passing Score for Each UT-CDL Knowledge Test
If you're preparing for the Utah CDL Permit Test through the Utah Department of Public Safety, Driver License Division (DLD), the number that matters most is 80%. That's the passing threshold for the General Knowledge test - the exam every single CDL applicant in Utah must pass, regardless of the class of license or endorsements you're pursuing.
The General Knowledge test is 50 closed-book, multiple-choice questions administered in English. To pass, you need to answer at least 40 of the 50 questions correctly. There's no partial credit and no curve - it's a straight percentage cutoff applied to whatever questions you receive.
If you're also testing for a combination vehicle endorsement or air brakes knowledge, those tests use the same 80% standard, just applied to a smaller question pool: 20 questions for Combination Vehicles and 25 for Air Brakes. That means on Combination Vehicles you can miss no more than 4 questions, and on Air Brakes no more than 5.
How Utah DLD Scores the Test
Utah's core knowledge tests are administered directly at DLD offices, not through a third-party testing vendor for the standard General Knowledge, Combination Vehicles, and Air Brakes exams. The tests are closed-book, meaning you cannot bring the handbook, notes, or reference material into the testing room. Everything is drawn from the concepts in the official March 2025 edition of the Utah CDL handbook, so studying an outdated version can leave gaps in your preparation.
Scoring is immediate - pass or fail is calculated the moment you submit your answers, and DLD staff can tell you your result right away. There's no essay component, no simulation, and no partial-credit scoring system. Every question carries equal weight toward your final percentage.
For a full walkthrough of exactly how the test is structured and what to expect on test day, the UT-CDL Study Guide 2026: How to Pass on Your First Attempt covers the process from application through your first attempt.
Question Breakdown by Exam Domain
The General Knowledge test draws from three broad content domains. Understanding how these domains are weighted helps you allocate study time where it counts, rather than spreading effort evenly across material you may already know.
Domain 1: Introduction
Covers foundational material - the CDL system itself, license classifications, general rules for obtaining and maintaining a commercial license, and basic self-certification requirements.
- Understand the difference between license classes and what each permits you to drive
- Know medical and self-certification categories
Domain 2: Driving Safely
The largest practical domain on the test. This covers vehicle inspection, basic control, shifting, seeing and communicating on the road, speed and space management, and emergency maneuvers.
- Pre-trip inspection sequencing and what to check
- Space management, hazard perception, and railroad crossing rules
Domain 3: Transporting Cargo Safely
Focuses on cargo handling principles - weight distribution, securing loads, and the basic hazard awareness needed even if you don't hold a hazmat endorsement.
- Cargo weight and balance basics
- Securement principles that apply across vehicle types
For a deeper dive into each of these three domains, including how much of the 50-question exam typically draws from each area, see the UT-CDL Exam Domains 2026: Complete Guide to All 3 Content Areas. If you're trying to gauge how tough the material actually is compared to other credentials, How Hard Is the UT-CDL Exam? Complete Difficulty Guide 2026 breaks down the difficulty realistically.
Key Takeaway
Domain 2 (Driving Safely) covers the widest range of practical topics, so if you only have time to deep-review one area before test day, prioritize inspection procedures, space management, and emergency maneuvers.
What Happens If You Don't Hit the Score - Fee & Attempt Structure
Utah builds retesting directly into the application fee structure, which is worth understanding before you walk in cold. The $52 CDL application fee includes two attempts on each required core knowledge test - so if you fail General Knowledge once, you get a second try under the same fee.
If you use both attempts and still haven't reached 80%, you'll need to pay again for another pair of attempts, which costs $26. Endorsement knowledge tests - like air brakes or combination vehicles, if you're pursuing those separately - are billed differently: $9 covers two attempts on an endorsement test.
| Test | Questions | Passing Score | Included Attempts |
|---|---|---|---|
| General Knowledge | 50 | 80% (40 correct) | 2 attempts within $52 fee |
| Combination Vehicles | 20 | 80% (16 correct) | 2 attempts within $52 fee |
| Air Brakes | 25 | 80% (20 correct) | 2 attempts within $52 fee |
| Additional core attempts | - | - | 2 more attempts for $26 |
| Endorsement test | Varies | Varies by endorsement | 2 attempts for $9 |
This fee structure means the real cost of failing isn't catastrophic, but it isn't free either. Retesting fees add up if you're not prepared, and repeated fails can also push your timeline back since you'll need to reschedule at a DLD office. For a complete breakdown of every fee associated with getting licensed - not just the knowledge test attempts - check the UT-CDL Certification Cost 2026: Complete Pricing Breakdown.
Eligibility You Need Before You Even Sit for the Test
Passing score aside, Utah has baseline eligibility rules you must satisfy before DLD will even let you schedule the knowledge test. You must be at least 18 years old, have held a Class D license for at least one year, and meet identity, residency, self-certification, and medical requirements. Applicants also need to complete applicable Entry-Level Driver Training (ELDT) before testing, depending on the license class and endorsements being pursued.
A few restrictions matter for younger applicants: drivers under 21 are limited to intrastate operation only and cannot obtain H, P, or S endorsements, even if they pass the relevant knowledge test. It's also worth noting that Utah paused non-domiciled CDL issuance on January 20, 2026, which affects applicants who don't have a Utah domicile.
For the complete eligibility checklist, including documentation you'll need to bring to the DLD office, see UT-CDL Requirements 2026: Eligibility, Prerequisites & How to Qualify.
A Domain-Focused Study Timeline
Rather than studying everything evenly, structure your prep around the domains most likely to trip up first-time test-takers. Here's a practical four-week approach built specifically around the General Knowledge test's three domains and, if applicable, the Combination Vehicles and Air Brakes tests.
Domain 1 - Introduction & Foundations
- Read the full March 2025 handbook section on license classes and self-certification
- Take a diagnostic practice run to identify weak areas early
Domain 2 - Driving Safely (the biggest domain)
- Drill pre-trip inspection order until it's automatic
- Focus on space management, speed adjustment, and emergency maneuver scenarios
Domain 3 - Transporting Cargo Safely + Endorsement Prep
- Review cargo securement and weight distribution rules
- If pursuing Combination Vehicles or Air Brakes, start dedicated question sets now since each test has fewer questions and less margin for error
Full Simulation & Weak-Spot Cleanup
- Run full 50-question practice sessions timed like the real test
- Retake any domain where you're consistently below 80%
Full-length practice runs on our practice test platform are the fastest way to simulate the actual 80% threshold before you're sitting in a DLD office with real stakes. Repeated exposure to the question style - not just the content - is what closes the gap between "I studied" and "I passed."
Core Knowledge Tests at a Glance
Because Utah requires General Knowledge for every CDL class, and adds Combination Vehicles or Air Brakes depending on the vehicle and endorsements you're after, it helps to see all three side by side alongside what's actually tested.
- General Knowledge: Required for all classes; covers Domains 1-3 above; 50 questions, 80% to pass.
- Combination Vehicles: Required if operating combination vehicles (e.g., tractor-trailers); 20 questions, 80% to pass.
- Air Brakes: Required if your vehicle is equipped with air brakes; 25 questions, 80% to pass.
If you're weighing whether pursuing the CDL - and the study time it demands - pays off relative to the jobs it opens up, Is the UT-CDL Certification Worth It? Complete ROI Analysis 2026 and UT-CDL Salary Guide 2026: Complete Earnings Analysis lay out the practical tradeoffs. And if you want a sense of how other applicants tend to perform on these exact tests, UT-CDL Pass Rate 2026: What the Data Shows is worth reading before test day.
After You Pass: The 180-Day CLP Clock
Passing the knowledge test at 80% or better issues you a Commercial Learner Permit (CLP), not your full CDL. That permit is valid for 180 days, and you're required to hold it for at least 14 days before you're eligible to schedule your skills (driving) test. This means your knowledge test score isn't just a checkbox - it starts a clock that governs when you can legally move to behind-the-wheel testing and how much time you have to complete the process before needing to retest.
Plan backward from that 180-day window. If you're also pursuing endorsements that require their own knowledge tests, schedule those early in the CLP period so scheduling delays don't eat into the time you need for skills test prep.
For a fast last-minute review before your appointment, the UT-CDL Cheat Sheet 2026: One-Page Review of Must-Know Facts condenses the highest-yield facts into a single scan-friendly reference. And if scheduling logistics - testing windows, deadlines, and how far in advance to book - are unclear, UT-CDL Exam Dates 2026: Testing Windows, Deadlines & Scheduling walks through the timeline in detail.
Frequently Asked Questions
You need 80% correct, which means answering at least 40 of the 50 multiple-choice questions correctly. This same 80% threshold applies to the Combination Vehicles and Air Brakes knowledge tests as well.
The General Knowledge test has 50 questions, the Combination Vehicles test has 20 questions, and the Air Brakes test has 25 questions. All are closed-book and administered in English at DLD offices.
Your $52 CDL application fee includes two attempts per core knowledge test, so a first failure isn't costly. If you fail both included attempts, an additional pair of attempts costs $26; endorsement retests cost $9 for two attempts.
Yes. General Knowledge is required for every CDL class in Utah, regardless of which vehicle type or endorsements you're pursuing. Combination Vehicles and Air Brakes tests are only required if applicable to your vehicle.
Once you pass the knowledge test and receive your CLP, it's valid for 180 days. You must hold the CLP for at least 14 days before you're eligible to schedule your skills test.