10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
These 10 free OR-CDL questions are organized by exam domain, so you can see how each part of the Oregon CDL Permit Test blueprint is tested. Reveal the answer and explanation under each question.
During a pretrip inspection of a two-axle straight truck, the left steering tire measures 3/32 inch in every major groove and a rear tire measures 3/32 inch. Neither tire has cuts, bulges, or exposed cord. Which finding requires correction before the vehicle is driven?
Correct answer: C - The steering tire only; it is below the 4/32-inch minimum
On a dry, level highway, a 60-foot tractor-trailer traveling 55 mph reaches a landmark five seconds after the car ahead. No vehicle is tailgating the truck. What adjustment is appropriate?
Correct answer: A - Drop back until the interval is at least seven seconds
An 18-foot, 8,000-pound crated machine on a standard flatbed is not blocked against forward movement and is not subject to a commodity-specific securement rule. Three tiedowns each run from one side of the flatbed, over the cargo, to an anchor on the opposite side; each tiedown has a 1,500-pound working load limit (WLL). Which assessment is correct?
Correct answer: D - The system meets both the minimum tiedown count and aggregate WLL
At highway speed, the tractor's right steering tire blows and the vehicle pulls hard to the right. What should the driver do first?
Correct answer: B - Hold the wheel firmly and avoid braking at first
At a roadside inspection, a driver operating a commercial motor vehicle (CMV) tests at 0.02% BAC. There was no crash, test refusal, controlled-substance use, or other offense. The driver argues that the CMV disqualification threshold is 0.04%. What is the correct immediate disposition?
Correct answer: C - Issue a 24-hour out-of-service order
With a tractor-trailer secured and its air system fully charged, the engine is off, the wheels are chocked, the parking brakes are released, the trailer air-supply control is pushed in, and the service brake is held fully applied after the initial pressure drop. The gauges then lose 3 psi in one minute. How should this result be interpreted?
Correct answer: A - It passes; the applied combination limit is 4 psi per minute
During a controlled air-brake test, the low-air warning first activates at 53 psi, and the parking-brake control pops out at 32 psi. Which conclusion is correct?
Correct answer: D - The warning is late, while the 32-psi pop-out is normal
A tractor-trailer with functioning ABS on all axles rounds a bend and encounters stopped traffic. The driver must brake hard, and an open escape lane remains to the left. Which response best preserves control?
Correct answer: B - Apply firm brake pressure and steer into the clear lane as needed
After backing under a semitrailer, the driver sees a visible gap between the trailer apron and fifth-wheel plate. The locking jaws appear closed, but they are around the kingpin head rather than the shank. What does this show?
Correct answer: A - A false coupling that must be corrected before travel
A driver is uncoupling a loaded semitrailer on firm, level ground. The trailer wheels are secured, the landing gear supports the load, the lines are disconnected, and the fifth wheel is unlocked. What is the safest next maneuver?
Correct answer: C - Pull partly clear, stop, and verify the trailer remains supported
The OR-CDL exam also covers these domains. Drill them in the full free practice test:
The full bank has 1,020 more OR-CDL questions with explanations.
Continue in the free practice test →
View plans