Air Brakes #2
Air Brakes Endorsement Test | Oklahoma 2026 #2
Train for FREE online with our Oklahoma CDL air brake test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a OK Class A/Class B driver license in 2026, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that the requirements for CDL may vary from state to state.
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1 . When leaving your vehicle unattended:
In general, you should always use the parking brake when parking your vehicle. However, you should not apply the parking brake if your brakes are very hot or if your brakes are wet and temperatures are below freezing.
2 . You should test the low pressure warning signal by:
It is essential that your low pressure warning light functions properly. After allowing the system to charge, you can test the warning signal by rapidly applying and releasing the brake pedal. This will release air from the braking system and the warning signal should come on when pressure drops to a dangerous level.
3 . Before driving a vehicle with air brakes, you should ensure that the ____ come on automatically when air pressure falls below 45 psi.
Before driving a vehicle with air brakes, you should ensure that the spring brakes come on automatically when air tank pressure falls to a level between 20 and 45 psi. You can do this by chocking the wheels and releasing air from the braking system by stepping on and off the brake pedal. Once the pressure levels drop to an unsafe level, the parking brake valve should pop out and spring brakes should come on.
4 . To make a stop in a vehicle equipped with air brakes, the driver should:
To make a normal stop in a vehicle that is equipped with air brakes, you should simply press the brake pedal down.
5 . When you are about to start down a hill, you should switch into a ____ gear.
Before starting down a hill, be sure to switch into a low gear. Gravity will increase your vehicle's speed as you travel downhill.
6 . If the safety relief valve in the air brake system releases air:
An air brake system has a safety relief valve, which releases air from the tanks if the pressure gets too high. If the valve must operate, something in the system is wrong and should be addressed by a mechanic.
2026 Oklahoma | Frequently Asked Questions
In Oklahoma, to acquire a CDL Passenger endorsement, you must first possess a Commercial Driver’s License (CDL). Next, study the Oklahoma CDL manual's passenger transport section. After studying, schedule and pass the written knowledge test at a Department of Public Safety testing facility. Some may also need to pass a skills and driving test in the type of vehicle you plan to operate.
To obtain a CDL Passenger license in Oklahoma, you must be at least 21 years old, possess a valid Commercial Driver's License (CDL), and pass the passenger transport written knowledge test. In some cases, you may also need to pass a skills and driving test in the type of vehicle you plan to operate. A clean driving record is also crucial.
While Oklahoma doesn't require specific training to secure a CDL Passenger endorsement, it's recommended to have training for the best chance of passing the written and skills tests. Experience driving commercial vehicles can also be beneficial. Studying the passenger transport section of the Oklahoma CDL manual is crucial to understand regulations and safety procedures.
Yes, to obtain a CDL Passenger endorsement in Oklahoma, you must pass the Passenger endorsement written test. This test covers topics such as vehicle inspection, loading and trip start, on the road, after-trip vehicle inspection, prohibited practices, and use of brake-door interlocks. No additional road skills test is required for this endorsement.
During the CDL Passenger endorsement assessment, you'll need to demonstrate skills such as proper pre-trip inspection, safe loading and unloading of passengers, use of emergency exits, responding to emergency situations, and safely navigating the vehicle on the road. You'll also need to show proficiency in driving in various conditions and handling different passenger scenarios.
No, you cannot legally transport passengers in Oklahoma without a valid CDL Passenger endorsement. This endorsement is required for drivers who wish to operate a vehicle that can carry 16 or more passengers, including the driver. Driving such a vehicle without the appropriate endorsement can result in penalties, including fines and suspension of driving privileges.
Yes, you can add a CDL Passenger endorsement to your existing commercial driver's license in Oklahoma. You don't need a new application. You'll need to pass the Passenger endorsement written test and pay the required fees. Once you've passed, the endorsement will be added to your current CDL.
Yes, there are certain restrictions for drivers with a CDL Passenger endorsement in Oklahoma. Drivers must not have any serious traffic violations within the past two years. They are also required to pass a background check and must not have any prior disqualifying criminal offenses. Additionally, drivers are expected to maintain a high level of safety and compliance with all transportation regulations.
Yes, in Oklahoma, to obtain a CDL Passenger endorsement, you must be at least 21 years old. This is because interstate driving is often involved when transporting passengers, and federal regulations mandate a minimum age of 21 for interstate commercial driving. So, you must meet this age requirement before you can apply for the endorsement.
With a CDL Passenger endorsement in Oklahoma, you will be eligible to operate vehicles designed to transport 16 or more passengers, including the driver. This includes buses, vans, and other vehicles used for public transportation or for-hire transportation services. The endorsement is required if you plan to operate a commercial vehicle that falls into this category.