Is this Class B to Class A Upgrade Program material specific to Oklahoma?

Yes. The knowledge test content is federal (49 CFR 383), so the questions apply in Oklahoma, and this page adds Oklahoma details: where you test (Oklahoma Service Oklahoma), which Oklahoma industries use this license, and the Oklahoma corridors the examples are drawn from.

Where do I take the Class B to Class A Upgrade Program knowledge test in Oklahoma?

Knowledge tests are given by Oklahoma Service Oklahoma. Bring your Oklahoma driver license, proof of residency, and your medical certificate; most Oklahoma offices require an appointment for CDL testing.

How long do I have to study the Oklahoma Class B to Class A Upgrade Program material?

Access lasts 120 days from purchase, which is enough to study, take the practice tests, and pass at Oklahoma Service Oklahoma with time to spare. Retakes in Oklahoma are allowed after a short wait, so a second attempt is covered too.

Oklahoma Class B to Class A Upgrade Program

Overview

Upgrade prep for Class B CDL holders moving to Class A, including combination vehicles, coupling, air brakes, and HOS theory.

Class B to Class A Upgrade Program for Oklahoma CDL Applicants

Oklahoma's energy sector drives strong demand for tanker and HazMat-endorsed operators across the oil patch. With oil and gas field services, agriculture and cattle, aerospace logistics driving much of the freight in Oklahoma, the Class B to Class A Upgrade Program material below is the part of the Oklahoma CDL that those employers screen for first.

The Oklahoma Class B to A upgrade: Combination Vehicles and Air Brakes knowledge tests at Oklahoma Service Oklahoma, then a Class A skills test. Since February 2022, ELDT theory and behind-the-wheel training must also be logged with an FMCSA-registered provider before Oklahoma Service Oklahoma will schedule the test.

Where Oklahoma drivers use this

Aerospace logistics: dump trucks, mixers, and flatbed tractors on construction routes
Wind energy equipment: heavy-haul tractors on wind projects
Oil and gas field services: crude, fuel, and chemical tankers (N and H endorsements) serving the energy sector
Agriculture and cattle: livestock trailers and refrigerated meat loads to packers and markets
Wind energy equipment: oversize wind-turbine blade and tower transport

Most Oklahoma CDL work runs the I-35, I-40, I-44 corridors and the Oklahoma City area, so the examples in the practice questions lean on the vehicles and loads you will see there.

Testing, appointments, and fees are handled by Oklahoma Service Oklahoma. See the Oklahoma CDL classes and Oklahoma endorsements pages for the full licensing picture.

Common Oklahoma questions

Is this Class B to Class A Upgrade Program material specific to Oklahoma?: Yes. The knowledge test content is federal (49 CFR 383), so the questions apply in Oklahoma, and this page adds Oklahoma details: where you test (Oklahoma Service Oklahoma), which Oklahoma industries use this license, and the Oklahoma corridors the examples are drawn from.
Where do I take the Class B to Class A Upgrade Program knowledge test in Oklahoma?: Knowledge tests are given by Oklahoma Service Oklahoma. Bring your Oklahoma driver license, proof of residency, and your medical certificate; most Oklahoma offices require an appointment for CDL testing.
How long do I have to study the Oklahoma Class B to Class A Upgrade Program material?: Access lasts 120 days from purchase, which is enough to study, take the practice tests, and pass at Oklahoma Service Oklahoma with time to spare. Retakes in Oklahoma are allowed after a short wait, so a second attempt is covered too.

When Is This Useful?

Helps drivers expand from heavy single vehicles into tractor-trailers and other combination vehicle work.

Who Is This For?

Current Class B CDL holders who need Class A authority for new job duties or equipment assignments.

Topics Covered

Combination Vehicle Dynamics

Upgrading from Class B to Class A means operating vehicles with fundamentally different handling. Off-tracking, rearward amplification, and trailer swing all require new driving habits. The Combination Vehicles written test focuses on these differences compared to single heavy vehicles.

Coupling and Uncoupling Procedure

Correctly connecting a tractor to a trailer is a critical Class A skill tested both on the written exam and during the skills test. This module covers the exact coupling sequence that examiners expect to observe during the pre-trip exercise.

Air Line Connections

Class A combination vehicles use service and emergency air lines between the tractor and trailer that Class B drivers have not typically operated. You will learn how to connect them correctly, perform pressure checks, and identify warning signs of failure.

Trailer and Coupling Inspection

Adding a trailer to your pre-trip inspection means covering the coupling area, fifth wheel, air connections, trailer brakes, and landing gear in sequence. The Class A skills test expects you to demonstrate all of these additional inspection points.

Class A Test Readiness

The Class A upgrade requires passing the Combination Vehicles written knowledge test plus completing a new skills test on a Class A vehicle. This section prepares you for the content differences, scoring criteria, and what Class A evaluators assess differently from Class B.

Class B to Class A Upgrade Program

$37.95

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What's Included:

Combination Vehicles
Air Brakes
Class B to A Upgrade Theory