Oklahoma Driver's Examination

Air Brakes #1

FREE Air Brakes Endorsement Test Online | Oklahoma 2024

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 2021, 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.

Number of Question 25

Passing Score 20

Number of Tests 20

1 . During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?

3 psi in one minute.

6 psi in one minute.

8 psi in one minute.

When performing a static leakage test on a double combination vehicle with air brakes, the leakage rate should be no more than 3 psi in one minute. If the air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.

2 . During an inspection, slack adjusters on S-cam brakes should not move more than:

One foot.

One centimeter.

One inch.

Check each slack adjuster after parking on level ground, setting wheel chocks, and disengaging the parking brake. Pull the slack adjusters to make sure they do not move more than about one inch from where the push rod is attached. If they move more than one inch, they may be out of adjustment and will need to be fixed.

3 . You should test the low pressure warning signal by:

Turning on the engine and applying the trailer hand brake.

Rapidly pressing and releasing the brake pedal.

Removing wheel chocks and disengaging the parking brake.

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.

4 . If the low air pressure warning signal comes on in a vehicle with air brakes, the driver should:

Test the brakes while driving, but continue driving if nothing seems wrong.

Immediately stop driving.

Drive with the hazard lights activated.

If the low air pressure warning signal comes on while you are operating a vehicle with air brakes, you should stop and safely park the vehicle as soon as possible. It is essential that you are able to stop safely while you still have some braking power remaining.

5 . When you are about to start down a hill, you should switch into a ____ gear.

Higher

Faster

Lower

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 . Air tank drains:

Should not be used in cold weather.

Are helpful to remove water and oil from the air tanks.

Are used to move air to the brakes.

Compressed air in an air brake system usually has a certain amount of water and oil in it. This can harm the system if allowed to accumulate. Air tanks have drain valves to aid in removing water and oil from the compressed air.

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2024 Oklahoma | Frequently Asked Questions

In Oklahoma, a Commercial Driver's License (CDL) Class B is a type of license required to operate vehicles with a Gross Vehicle Weight Rating (GVWR) of more than 26,000 pounds or towing vehicles not in excess of 10,000 pounds. This includes buses, dump trucks, delivery trucks, and utility trucks. The license requires passing a general knowledge test and a skills test.

A Class B CDL license in Oklahoma allows you to operate single vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, or any such vehicle towing a vehicle not in excess of 10,000 pounds GVWR. This includes straight trucks, large buses, segmented buses, box trucks, dump trucks with small trailers, and tractor-trailers.

To acquire a Class B CDL license in Oklahoma, you must be at least 18 years old (21 if you plan to drive interstate), possess a valid Oklahoma driver's license, pass a DOT physical examination, and have good vision and hearing. You'll also need to pass a written knowledge test and a skills test, which includes a pre-trip vehicle inspection, a basic controls test, and a road test.

In Oklahoma, you must be at least 18 years old to qualify for a Class B CDL license. However, if you intend to drive commercially across state lines (interstate commerce), federal regulations require that you be at least 21 years old.

Specific endorsements aren't necessary for a Class B CDL license in Oklahoma, but they can expand your job opportunities. Endorsements allow you to operate special types of vehicles like school buses, tank vehicles, or vehicles carrying hazardous materials. To get an endorsement, you must pass additional knowledge and skills tests related to the specific vehicle type.

The Class B CDL skills test in Oklahoma includes three parts: pre-trip vehicle inspection, basic vehicle control, and on-road driving. You will have to demonstrate your ability to inspect your vehicle, make sure it's safe to drive, show basic control like backing and turning, and prove you can safely drive in various road conditions and traffic situations.

Class B CDL license holders in Oklahoma are permitted to operate any single vehicle with a GVWR of 26,001 pounds or more, and any such vehicle towing another not exceeding 10,000 pounds. However, they are not allowed to operate a Class A combination vehicle. Restrictions may apply depending on the driver's record and the specific endorsements on the license.

In Oklahoma, the written test for a Class B CDL is primarily offered in English. However, some testing centers may offer the test in Spanish. It's important to note that federal regulations require all CDL holders to have a basic understanding of the English language to ensure safety on the roads.

Yes, you can request test accommodations for the Class B CDL written exam in Oklahoma if you have a disability. You'll need to provide documentation of your disability and specify the type of accommodation you need. It's recommended to make your request well in advance of your scheduled test date to allow time for approval.

Yes, you can retake the Class B CDL written test in Oklahoma if you don't pass on your first attempt. You must wait at least one day before retesting. There may be a retest fee. It's recommended to review the areas you struggled with before attempting the test again. Keep in mind, after three failed attempts, you'll need to wait 30 days before retesting.