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The air brakes endorsement applies to applicants who wish to drive a vehicle with air brakes in Class A, B, or C CDL. To drive a vehicle with air brakes, you must pass the air brake component of the Oklahoma CDL knowledge test. The OK CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%). The test covers the information found in the air brakes section of the Oklahoma CDL Manual. Take this OK CDL practice test now to prepare for the actual air brakes test!
1.
The space under a heavily loaded vehicle can be very small. This can cause problems:
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on dirt roads.
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when crossing railroad tracks.
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All of the above.
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2.
Some air brake systems have an alcohol evaporator. Checking the alcohol container and filling it up as necessary:
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reduces the risk of ice in air brake valves during cold weather.
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helps keep the engine cool, as well as lubricating it.
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helps you avoid wheel lock up.
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3.
If the drive wheels begin to spin when accelerating, you should:
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continue to accelerate.
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brake gently.
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take your foot off the accelerator.
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4.
An alcohol evaporator:
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is used to reduce the risk of ice in air brake valves and other parts during cold weather.
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protects the air brake system from too much pressure.
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used to reduce the chance of the front wheels skidding.
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5.
You must take the CDL skills tests in the type of vehicle for which you wish to be licensed. If your test vehicle does not have air brakes:
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you'll need to take another knowledge test about air brakes.
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you'll have to immediately retake your test using another vehicle.
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you will be restricted to driving vehicles without air brakes.
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6.
Why must air tanks be drained?
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Water can freeze in cold weather and cause brake failure.
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Water and
oil reduce the air pressure.
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To keep from fouling the air compressor oil.
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7.
ABS:
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allows you to brake harder.
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should only be used on dry roads.
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is an addition to your normal brakes.
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8.
During a trip you should check:
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pressure gauges.
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temperature gauges.
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All of the above.
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9.
Older trailers do not have spring brakes. If the air supply leaks away:
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the ABS won't work properly.
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there will be no emergency brakes.
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the trailer will stop normally.
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10.
If a vehicle is equipped with ABS, when you start the engine:
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the ABS indicator light on the dash should come on and then turn off.
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the spring brakes will come on.
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the wheels will lock up.
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Frequently Asked Questions
Teen drivers in Oklahoma must follow the Graduated Driver License (GDL) program to obtain a class D driver license. Below are the specific age requirements for each phase of the GDL:
- Student driver (no license) ? you must be at least 15 years old and enrolled in a state-certified Driver Education course.
- Learner permit ? you must be at least 15 ½ years old if you have taken driver education, or 16 years old if you have not taken driver education.
- Intermediate license ? you must be at least 16 years old and hold a permit for at least 6 months.
- Unrestricted license ? you must be at least 16 ½ years old and have held an intermediate license for at least 6 months (if you have taken driver education) or be at least 16 ½ and have held an intermediate license for at least 1 year (if you have not taken driver education), or be 18 years old.
You can schedule an appointment online for the DMV written test at an Oklahoma licensing office. Simply choose the most convenient office, select your preferred date and time, and secure your spot. If your chosen office is currently full, you can check the estimated wait time and join the waitlist.
Ensure you have the following documents:
- Proof of Primary ID and additional documents if your name has changed.
- Proof of Social Security Number.
- Legal presence proof (if you are not a US citizen).
- Notarized Parent Authorization Form (for individuals under 18 without a parent or legal guardian present with them).
- Enrollment Contract or Completion Certificate (for those under 16 enrolled in a driver education course. If you are over 16 and have completed a driver education course, provide proof to waive the written test).
- Parent-Taught Affidavit approval number and proof of purchase from the Parent-Taught Program provider (for individuals under 16 opting for this driver education program).
Unlike many states, there are no alternative language options provided for the DMV written test in Oklahoma. The exam is currently available exclusively in English.
To prepare for the DMV written test, read the Oklahoma Driver's Handbook. Pay attention to road signs, parallel parking, turning, passing a vehicle, yielding the right of way, etc. Verify your knowledge with our practice tests or sign up for Premium, which offers extra resources to get ready for your exam.
The DMV written test has 20 questions. The questions cover different topics about driving, such as road signs, safe driving practices, and traffic laws. Carefully study the manual to enhance your chances of passing the exam.
For new drivers in Oklahoma, here are the driving restrictions based on the GDL program:
- Student Driver (No License) ? you can drive only when accompanied by a Certified Driver Education Instructor or a Public School Instructor.
- Learner Permit ? you may drive only from 5:00 a.m. to 10:00 p.m., and you must be accompanied by a licensed driver at least 21 years old.
- Intermediate License ? you may drive alone from 5:00 a.m. to 10:00 p.m. These hour restrictions do not apply for work, religious, or school activities, or if you are under the supervision of a licensed driver at least 21 years old seated near you. Additionally, you can transport only one passenger (except for family members) unless a licensed driver at least 21 is seated in the front seat.
If you don't pass your DMV written test, you need to wait at least one day before retaking it. You must pay an added fee. Review the manual once again and concentrate on areas where you may need additional preparation to improve your knowledge for the next attempt.