Oregon CDL — General Knowledge Practice Test

The Oregon CDL — General Knowledge knowledge test has ~50 questions; you need ~40 correct (80%) to pass.

Or take one of 10 full-length practice tests

50 questions · pass with 40 correct. You get instant feedback and an explanation after every answer.

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The full-length test, with feedback and an explanation after every answer.

Oregon CDL — General Knowledge practice tests

10 full-length practice tests, each with 50 questions and a pass mark of 40, like the real test. You see the answers and explanations after you grade.

Test 1
50 questions · pass with 40
When may you use a drug that a doctor has given you while driving a CMV?
Test 2
50 questions · pass with 40
What is the penalty for a second major offense such as driving a CMV under the influence?
Test 3
50 questions · pass with 40
You used a CMV while committing a felony that involved controlled substances. How long do you lose your CDL?
Test 4
50 questions · pass with 40
At what blood alcohol concentration is it illegal to operate a commercial motor vehicle?
Test 5
50 questions · pass with 40
When making a left turn, how far into the intersection should you be before you begin turning?
Test 6
50 questions · pass with 40
How does the speed at which you drink affect your blood alcohol concentration?
Test 7
50 questions · pass with 40
If a hill or curve blocks other drivers from seeing your stopped vehicle, what should you do with the rearmost triangle?
Test 8
50 questions · pass with 40
How much of your work history must you give an employer when applying for a commercial driving job?
Test 9
50 questions · pass with 40
Which part of the brain does alcohol affect first?
Test 10
50 questions · pass with 40
When required to stop at a crossbuck with no painted stop line, how far from the nearest rail must you stop?