Free Wyoming CDL practice test online
Take a free Wyoming CDL practice exam online with clear explanations—no sign-up. Coverage includes general knowledge, vehicle systems, combination vehicles, cargo, and endorsements. Then verify current requirements with Wyoming Driver Services.
CDL knowledge tests are federally regulated, so the passing score in Wyoming is the same as everywhere else: 80% correct on every knowledge test. You must also hold a commercial learner’s permit for 14 days before the skills test.
New to the knowledge test? CDL endorsements explained · One-week study plan
Requirements before you test
Wyoming CDL test requirements
Commercial licensing is largely federal. Any figure above credited to a 49 CFR section applies in every state — see 49 CFR 383.135(a)(1) and 49 CFR 383.25(e). A figure credited to Wyoming Driver Services is Wyoming’s own, and may be stricter than the federal floor. Test length, fees, and scheduling are set by Wyoming Driver Services (official source).
Entry-Level Driver Training comes first
Since February 7, 2022, a new Class A or Class B CDL, a class upgrade, or a first passenger, school bus, or hazardous materials endorsement requires training from a provider on the FMCSA Training Provider Registry (49 CFR 380.600). Practice questions are study material and do not satisfy that requirement.
FMCSA Training Provider RegistryYou need a Wyoming licence first
A commercial learner’s permit only counts if you already hold an ordinary licence from the same state (49 CFR 383.25(a)(2)). The Wyoming non-commercial knowledge test runs 25 questions and needs 20 correct, with permits issued from age 15.
Wyoming permit practice testWhat you will practice
Build coverage topic by topic.
Each question carries a topic, difficulty, explanation, and source section so your review has context.
Sample questions
5 Wyoming CDL practice questions
Try these Wyoming sample questions now — each shows the correct answer with a plain-language explanation and a source section. The full 600-question bank is in the practice run.
1. When backing a trailer, making pull-ups means:
- Pulling forward to reposition before continuing to back
- BDisconnecting the glad hands
- CRaising the landing gear mid-backup
- DBacking faster in a curve
Answer: Pulling forward to reposition before continuing to back. Pull-ups let you straighten the combination instead of forcing a worsening angle.
Source: Commercial Driver License Manual — Combination vehicles — backing
2. Battery fluid and hydrochloric acid are examples of Hazard Class:
- A1
- B3
- C7
- 8
Answer: 8. Class 8 covers corrosives such as acids and battery fluid that can burn skin or damage materials on contact.
Source: Commercial Driver License Manual — Hazardous materials — hazard classes
3. On a wet road, the CDL manual recommends reducing speed by about:
- One third
- BOne half
- CThree quarters
- DOne tenth
Answer: One third. Wet roads can roughly double stopping distance. Slow from about 55 mph to about 35 mph as a one-third reduction example.
Source: Commercial Driver License Manual — Driving safely — matching speed to the road
4. When a driver leaves the cab, hazardous-materials shipping papers must be:
- AMailed ahead to the consignee
- BStored in the glove box out of sight
- CLocked in the trailer with the cargo
- On the driver's seat or in a pouch on the driver's door
Answer: On the driver's seat or in a pouch on the driver's door. Responders must find the papers quickly. In the seat while driving they stay within reach and clearly visible.
Source: Commercial Driver License Manual — Hazardous materials — shipping papers
5. The service brake system is the air-brake system used for:
- AEmergency spring application only
- BTrailer supply only
- CParking only on grades
- Normal stopping while driving
Answer: Normal stopping while driving. Service brakes use controlled air pressure at the brake chambers for everyday slowing and stopping.
Source: Commercial Driver License Manual — Air brakes — parts of the air brake system
CDL knowledge areas
Classes and endorsements, organized.
Each area below scopes the reviewed question bank to one knowledge test. The material is federal, so it applies in Wyoming just like everywhere else — the endorsement guide explains how the codes fit together.
The foundation for commercial driving: inspections, space, speed, communication, hazards, and safe operation.
- Pre-trip inspection
- Space and speed management
- Railroad crossings
- Emergency procedures
Understand air-brake components, inspections, warning devices, stopping distance, and controlled braking.
- Dual air systems
- Low-air warnings
- Brake lag and fade
- Applied-leak and static checks
Prepare for safe coupling, inspection, turning, backing, and handling of tractor-trailer combinations.
- Fifth-wheel inspection
- Coupling and uncoupling
- Off-tracking
- Trailer skid prevention
Study hazard communication, shipping papers, placards, loading rules, parking, and emergency response responsibilities.
- Hazard classes
- Placards and labels
- Shipping papers
- Loading and segregation
Learn how liquid surge, outage, bulkheads, and high centers of gravity change vehicle handling.
- Liquid surge
- Outage requirements
- Smooth braking
- Rollover prevention
Practice converter-dolly inspection, coupling order, rearward amplification, and stability principles.
- Coupling sequence
- Converter dollies
- Rearward amplification
- Space management
Prepare to inspect, load, and operate buses while keeping passengers, aisles, and exits safe.
- Vehicle inspection
- Passenger loading
- Emergency exits
- Prohibited practices
Review student loading, danger zones, mirrors, emergency procedures, and special railroad-crossing duties.
- Danger zones
- Student loading
- Mirror use
- Railroad crossings
More west practice
Nearby CDL practice tests
Jump to another west state hub, or browse every jurisdiction.
Common questions
What this practice can—and cannot—tell you.