What's the Passing Score on the Oklahoma CDL General Knowledge Test?
40 out of 50 — 80% — passes Oklahoma's CDL General Knowledge test. The number is federal; what it actually costs to get there is Oklahoma's own story.
A fixed national number, a very state-specific price tag
49 CFR Part 383 sets the CDL general knowledge test at 50 questions and 80% nationwide — Oklahoma administers that standard rather than writing its own.
What Oklahoma does set: roughly $153 for a complete CDL once you add the CLP application, credential fees, and other charges by class — worth budgeting for before you start, not after.
The 14-day gap between passing and testing again
Passing the knowledge test gets you the CLP, but Oklahoma still requires holding it a full 14 days before the skills test can happen — plan around that gap rather than assuming you can test back-to-back.
Both the knowledge test and, later, the skills test run through Service Oklahoma, in person.
Where applicants actually lose points
Numeric details are the real trap here — an air-brake PSI threshold, an hours-of-service cap, a mileage marker for a cargo recheck. None of it comes from intuition; it has to be memorized precisely.
Skimming a missed practice question's explanation just lets the same gap resurface later under time pressure — read it in full instead, every time.
Frequently Asked Questions
Can Oklahoma require a higher passing score than 80% for the CDL test?
No. 49 CFR Part 383 fixes the CDL general knowledge test at 50 questions and an 80% passing threshold nationwide — Service Oklahoma administers that federal standard rather than setting its own.
How long after passing the knowledge test can I take the skills test?
You must hold the CLP for at least 14 full days first.
What score should I aim for on practice tests?
Aim for 90% or higher consistently before your appointment. That buffer above the 80% minimum accounts for first-attempt nerves.
Ready to put this into practice?
Start a free Oklahoma cdl practice testLast reviewed: 2026-07-22