How Many Questions Are on the Oklahoma CDL General Knowledge Test?
50 questions. That count is fixed by 49 CFR Part 383, the same across every state — Service Oklahoma administers the federal format rather than writing its own.
What Oklahoma actually controls
The federal government owns the question count and 80% threshold. Oklahoma's own contribution is a $25 CLP application fee for a Class A applicant ($15 for Class B or C), and the requirement that the vision and written tests happen in person at a Service Oklahoma Licensing Office.
Depending on the class and endorsements pursued, additional tests — like Air Brakes or Combination Vehicles — may also apply on top of the General Knowledge test.
A 14-day CLP holding period
Once issued, an Oklahoma CLP must be held for at least 14 full days before the skills test can be scheduled.
A complete Oklahoma CDL, combining the CLP application, credential fees, and other charges, runs roughly $153 depending on license class.
How our practice tests are structured
Our practice tests break results down by topic immediately, so a weak spot doesn't stay hidden inside an otherwise decent overall score.
Each question includes an explanation and a source reference, so you learn why an answer is correct instead of just memorizing a letter.
Frequently Asked Questions
How many questions are on Oklahoma's CDL General Knowledge test?
50 questions, the federally standard length used nationwide, not an Oklahoma-specific number.
What does the Oklahoma CLP application cost?
$25 for a Class A applicant, or $15 for Class B and C.
Where is the CDL knowledge test given?
In person at a Service Oklahoma Licensing Office.
Ready to put this into practice?
Start a free Oklahoma cdl practice testLast reviewed: 2026-07-22