Oklahoma CDL practice tests

Oklahoma handles commercial driver licensing through Service Oklahoma, a single state agency that replaced the old split between the Department of Public Safety and a network of separate tag agencies for driver license work. That consolidation means the office issuing your license, your Real ID and your vehicle paperwork is now one and the same, which is a genuinely different setup from states that still split those jobs across two or three departments.

What Oklahoma requires

Every figure below names the document it came from, so you can check it rather than take our word for it.

Passing score
80% 49 CFR Part 383, Commercial Driver's License Standards, 383.135
Minimum age (in-state driving)
18 years old 49 CFR Part 383, Commercial Driver's License Standards, 383.71
Minimum age (across state lines)
21 years old 49 CFR Part 391, Qualifications of Drivers, 391.11
Permit holding period
14 days 49 CFR Part 383, Commercial Driver's License Standards, 383.25

Fees change without notice, so we do not repeat them here. Check Service Oklahoma for the current cost.

Oklahoma practice tests

The knowledge tests are set by federal rule, so the questions are the same wherever you sit them. What changes is the paperwork above.

One agency, several services

Because Service Oklahoma brought driver licensing under one roof, the process of booking a knowledge exam sits alongside other services you may already be dealing with, rather than pointing you to a separate motor vehicle bureau. Oklahoma is also a through-freight state: I-35 runs north to south, I-40 runs east to west, and I-44 cuts across the northeast, so a large amount of commercial traffic passes through the state rather than starting or ending there. That keeps demand for licensed drivers steady, particularly for over-the-road work rather than local routes.

Federal rules, regardless of the agency running the test

None of that changes what is actually tested. The knowledge exams, the pass mark and the minimum ages come from 49 CFR Part 383 and apply the same way across the country. You need 80 percent correct on each section to pass — the federal floor, not something Oklahoma set independently. You can drive commercially within Oklahoma at 18; crossing into Texas, Kansas, Missouri, Arkansas or New Mexico for work needs you to be 21.

Which exams apply to you

General knowledge is the one test nobody skips. What follows depends entirely on what you plan to drive. Miss the air brakes exam and a license still follows, but with a restriction stopping you from operating anything fitted with them. If your trailer weighs more than ten thousand pounds, add the combination vehicles exam to the list. After that come the endorsements, taken only where the job calls for them: tank, doubles and triples, hazardous materials, passenger, school bus.

Hazardous materials adds a Transportation Security Administration background check on top of the written test. That runs on its own federal timeline, separate from anything Service Oklahoma controls, so start it early rather than waiting until the exams are behind you.

Before you book

The commercial learner permit is the gate you have to pass through first, and federal rule requires it to be held for at least 14 days before a skills test can be scheduled. Use those early days for your knowledge exams rather than leaving them for later — that way a failed section still has room to be retaken.

You will not find a fee schedule on this site. Service Oklahoma reviews its charges periodically, and a number written here today could easily be wrong by the time you read it, so treat their office as the only reliable source for the current cost. What we focus on instead is the content of the exams — which questions come up, and where in the source material each answer is drawn from.

Jump to a test

Every question on every one of these is free, and each answer names the handbook page it came from.

Other states

Cited to the page, every time.

Every question names the handbook, section and page it was read from, so you can check the answer instead of taking our word for it.

How we write these