Free Oregon CDL practice test online
Take a free Oregon 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 Oregon Driver and Motor Vehicle Services.
CDL knowledge tests are federally regulated, so the passing score in Oregon 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
Oregon 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 Oregon Driver and Motor Vehicle Services is Oregon’s own, and may be stricter than the federal floor. Test length, fees, and scheduling are set by Oregon Driver and Motor Vehicle 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 Oregon 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 Oregon non-commercial knowledge test runs 35 questions and needs 28 correct, with permits issued from age 15.
Oregon 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 Oregon CDL practice questions
Try these Oregon 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. On a bus equipped with a standee line, passengers must not stand:
- ANext to an emergency exit
- BIn the centre aisle at any time
- CBehind the rear axle
- Forward of the line
Answer: Forward of the line. The line marks the area where a standing passenger would obstruct the driver or be unprotected in a collision.
Source: Commercial Driver License Manual — Passenger vehicles — standee line
2. Because of surge and high center of gravity, tank drivers must:
- Start, slow, stop, and turn very smoothly
- BUse only stab braking for every stop
- CIgnore posted ramp speeds
- DStart, slow, and stop as abruptly as possible
Answer: Start, slow, stop, and turn very smoothly. Smooth control limits surge. Keep steady brake pressure and do not release too soon when stopping.
Source: Commercial Driver License Manual — Tank vehicles — drive smoothly
3. Posted bridge clearance may be wrong after:
- AA fresh paint job on the sign only
- Road repaving or packed snow and ice that reduce actual clearance
- CInstalling new mud flaps
- DA change in radio stations
Answer: Road repaving or packed snow and ice that reduce actual clearance. An empty van also sits higher than a loaded one, so a bridge you cleared loaded may not clear empty.
Source: Commercial Driver License Manual — Managing space — space above
4. At speeds under 40 mph, a 40-foot vehicle needs about how many seconds of following distance?
- A8 seconds
- B2 seconds
- C3 seconds
- 4 seconds
Answer: 4 seconds. Allow one second per 10 feet of vehicle length under 40 mph: a 40-foot vehicle needs 4 seconds.
Source: Commercial Driver License Manual — Driving safely — space ahead
5. When backing under a trailer to couple, you should approach:
- AAt a sharp angle for leverage
- In a straight line so the kingpin enters the fifth-wheel jaws squarely
- CWith the landing gear fully raised first
- DWith glad hands already connected
Answer: In a straight line so the kingpin enters the fifth-wheel jaws squarely. A straight approach helps the kingpin hit the throat of the fifth wheel correctly for a secure lock.
Source: Commercial Driver License Manual — Combination vehicles — coupling
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 Oregon 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
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Common questions
What this practice can—and cannot—tell you.