CDL AIR BRAKES PRACTICE TEST - ALASKA

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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 Alaska CDL knowledge test. The AK 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 Alaska CDL Manual. Take this AK CDL practice test now to prepare for the actual air brakes test!
1. If you are being tailgated, you should:
increase your following distance.
move to the left lane.
speed up.
2. At passive railroad crossings, even if there are active railroad signals that indicate the tracks are clear, you must _________  to be sure it is safe to proceed.
stop, look, and listen
go, stop and listen
listen, look and stop
3. When is it safe to leave your vehicle unattended without applying the parking brakes or chocking the wheels?
When you are conducting your pre-trip inspection.
Never.
Only while you are taking a rest break.
4. Before starting down a hill, you should slow down and shift down:
so you can coast downhill.
to a gear that will cause your engine to exceed its redline.
to a speed that you can control without using the brakes hard.
5. With brake drums, if brakes become too hot:
the brakes may stop working.
your ABS will malfunction.
the brakes will supply too much power to the drive wheels.
6. The safety valve installed in the first tank the air compressor pumps air is set to open:
if there is too little pressure.
at 30 psi.
if there is too much pressure.
7. If your trucks has a high center of gravity, which of the following is true for curves?
You should travel at the posted speed limit.
You should slow down, as your truck can roll over at the posted speed limit for the curve.
Reduce your speed to a crawl.
8. The air compressor is connected to:
the radiator.
the engine.
the transmission.
9. Why must air tanks be drained?
To keep from fouling the air compressor oil.
Water can freeze in cold weather and cause brake failure.
Water and oil reduce the air pressure.
10. If you get stuck on railroad tracks, you should:
stay in the vehicle and call for help.
have a helper push your vehicle.
get out of the vehicle and away from the tracks.
 
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Frequently Asked Questions

When you reach the age of 14 in Alaska, you become eligible to obtain an instruction permit. If you are 16 or 17 years old and have held your learner's permit for six months with a good driving record, you can apply for a provisional driver's license. If you're 18 years or older, you can directly apply for your class D driver's license without provisional restrictions and without the need for parental consent. 
You can schedule and take the DMV written test at various locations such as schools, police departments, and government offices. After you pass the test, you are still required to visit an Alaska DMV office to complete the testing process. Alternatively, you can take the exam online at Knowto Drive, the official Alaska knowledge test platform. If you are under 18, you must be supervised by an adult who is at least 18 years of age, possessing a valid driver's license or ID from a U.S. State.
Ensure you bring these documents:

  • The Application (Form D1) and the Parental Consent Form (Form 433).
  • A primary document (proof of legal name, date of birth, and citizenship).
  • Proof of residential address (such as a utility bill, bank statement or mortgage documents).
  • Social Security Number (if you don't have it, you must provide documentation from the Social Security Administration to confirm).

Check the list of acceptable documents on the Alaska DMV website.

During the exam, if you understand English but have difficulty reading, you can bring someone to assist with reading the questions. It's important to note that, even with reading assistance, you must independently answer the questions to successfully complete the DMV written test. The online version of the permit test is also available in Spanish or with audio support.

To pass the DMV written test, study the Alaska Driver's Manual. Pay attention to road signs, parallel parking, turning, passing a vehicle, yielding the right of way, etc. Practice with our free tests or choose DMV Premium for additional resources!

The DMV written test has 20 questions, and you have 25 minutes to answer them. The questions cover different topics about driving, and the goal is to make sure you understand the rules of the road.

You must answer at least 16 questions correctly, and you can miss up to 4 questions to pass the test. The minimum score required to succeed in the exam is 80%. Take your time during the test to make sure you understand the questions well.

For at least six months after obtaining the provisional license, there are specific restrictions for new drivers in Alaska:
  • You are not allowed to carry passengers unless one of them is a parent, legal guardian, or a person aged at least 21. However, you are permitted to carry siblings without a parent in the vehicle.
  • Driving is not permitted between 1:00 am and 5:00 am unless accompanied by a parent, legal guardian, or a person at least 21 years old who holds a license for the class of vehicle in use. An exception is made for employment reasons. 

After six months of driving without convictions and maintaining a clean record regarding alcohol or drug use, you may qualify to have the provisional restrictions removed. Alternatively, once you reach 18 years of age, these limitations no longer apply.

These restrictions do not apply if you have an "off-system" license restricted to areas not linked to the land highway system or not connected to a highway with an average daily traffic volume of 499 or greater.


In Alaska, an instruction permit is valid for two years, with the option to renew it once. This ensures you have enough time to practice driving and fulfill the necessary requirements before the road test.

If you do not pass your DMV written test in Alaska, you can retake it the following day. You have five attempts available in one year. It is advisable to dedicate time to preparing adequately for the test to enhance your chances of success. Study the manual and sign up for DMV Premium to unlock exclusive PDF Cheat Sheets with the Top 100 Questions!

AK CDL Air Brakes Test

Number of questions: 25
Correct answers to pass:20
Passing score:80%
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