OK · CDL Class C

Oklahoma Class C CDL Practice Questions

This Oklahoma Class C CDL practice page is built from the 100-question bank currently saved for this task. The bank uses four answer choices and covers general knowledge, air brakes, hazardous materials, tank vehicles, passenger operation, and school bus topics. The specialty modules are conditional study scenarios rather than a claim that every Class C applicant takes every test. Service Oklahoma defines Class C as a single vehicle below the Class B weight threshold when hazardous-materials or passenger conditions require a CDL. Because Class C eligibility depends heavily on the operation and endorsements sought, applicants should use the practice bank to review relevant concepts and confirm the current Oklahoma and federal requirements that apply to their specific vehicle, passengers, cargo, and endorsements.

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Every test draws only from the Oklahoma CDL Class C question bank.

20questionsStart Class C test → 40questionsStart Class C test → 60questionsStart Class C test → 80questionsStart Class C test →

LICENSING GUIDE

What to know before you test

Use this overview together with the latest official guidance linked below.

Confirm that Class C matches the operation

Start by confirming that the vehicle does not fall into Oklahoma Class A or Class B. Service Oklahoma describes Class C as a single vehicle with a GVWR below 26,001 pounds when the operation requires a hazardous-materials or passenger endorsement. Passenger vehicles designed for 16 or more people, including the driver, require the passenger endorsement. Class C licensing by itself is not listed by FMCSA as an ELDT trigger, but first-time H, P, or S endorsements can require the applicable Entry-Level Driver Training. Match the license and endorsement path to the work you actually plan to perform.

Use the practice modules conditionally

The saved bank contains 100 questions in six modules: general knowledge, air brakes, hazardous materials, tank vehicles, passenger, and school bus. That mix is a study design, not a universal Oklahoma Class C exam blueprint. Service Oklahoma ties specialty testing to the vehicle or operation involved. H applies to qualifying hazardous-materials transport, P to qualifying passenger vehicles, and S to school buses; tank and air-brake material can also matter in specific Class C operating scenarios. Focus on the modules connected to the endorsements, restrictions, brake system, and vehicle type you expect to use.

Prepare for the written tests and permit stage

Service Oklahoma lists identity and lawful-presence documents, a valid Oklahoma Class D license, residency proof, a Social Security number, and immigration documents when applicable for the initial CDL process. Applicants take the CDL vision and required written tests in person. Oklahoma CareerTech’s current testing manual lists an 80 percent passing score for CDL written exams, with age 21 for the hazardous-materials exam and age 18 for the listed general, passenger, school-bus, tanker, and air-brake exams. For P or S endorsements requiring a skills test, Service Oklahoma issues a CLP that must be held for 14 full days before the drive test.

Complete endorsement-specific testing and licensing

Passenger and school-bus endorsements require the applicable knowledge and skills testing, and Service Oklahoma explains that the class of passenger test vehicle can create passenger-vehicle restrictions. First-time H applicants must complete the required hazardous-materials ELDT before the H knowledge test, while first-time P and S applicants must complete their applicable ELDT before the covered skills test. Medical qualification depends on the driver’s self-certification and operation; Service Oklahoma now receives qualifying medical certification electronically through the FMCSA system. Drivers operating CMVs in interstate commerce must also meet the federal minimum age of 21.

REQUIREMENTS OVERVIEW

Oklahoma CDL Class C requirements

Requirements depend on the applicant and can change. Verify each item with the cited agency.

age

Oklahoma Class C CDL applicants and drivers considering passenger, school-bus, hazardous-material, or interstate operation

Oklahoma CareerTech lists age 18 for the general CDL, air-brake, passenger, school-bus, and tanker written exams, and age 21 for the hazardous-materials exam. FMCSA separately requires age 21 to operate a CMV in interstate commerce.

documents

First-time Oklahoma Class C CDL applicants

Service Oklahoma lists proof of identity, proof of lawful presence, immigration documents when applicable, a valid Oklahoma Class D driver license, proof of residency, a Social Security number, and applicable ELDT documentation for the initial CDL process. Additional CLP, DL18, and vehicle documentation apply when a skills test is required.

tests

Oklahoma Class C applicants seeking H, P, or S privileges

Required written tests depend on the Class C operation and endorsements sought. P and S applicants complete endorsement-specific knowledge and skills testing and must hold the applicable CLP for 14 full days before the drive test. First-time H, P, and S applicants must complete the applicable federal ELDT before the covered knowledge or skills test.

passing

Oklahoma CDL knowledge-test applicants

The 2026 Oklahoma CareerTech testing manual lists an 80 percent passing score for all CDL written exams. The 100 questions on this practice page are the saved study-bank count and are not presented as an official Oklahoma Class C exam length.

applicability

Oklahoma applicants determining whether Class C and specialty endorsements apply

Service Oklahoma defines Class C as a single vehicle with a GVWR below 26,001 pounds that requires a hazardous-materials or passenger endorsement. Specialty modules in the mixed practice bank apply only when the relevant vehicle, cargo, passengers, brake system, or endorsement makes them applicable.

OFFICIAL REFERENCES

Sources for this guide

Open the current source before relying on licensing details.

Service Oklahoma - CDL First-Time ApplicantsCDL classes; application documents; CLP; drive test; medical certificate processOpen source ↗ Service Oklahoma - CDL Endorsements & RestrictionsH, N, P, S endorsements; air-brake guidance; CLP and passenger restrictionsOpen source ↗ Oklahoma CareerTech - Health & Professional Certification Testing ManualDepartment of Public Safety/Service Oklahoma CDL written exam informationOpen source ↗ FMCSA - Entry-Level Driver Training (ELDT)ELDT applicability for first-time H, P, and S endorsementsOpen source ↗ FMCSA - Age requirement for operating a CMV in interstate commerceMinimum age for interstate CMV operationOpen source ↗