CDL AIR BRAKES PRACTICE TEST - VERMONT

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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 Vermont CDL knowledge test. The VT 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 Vermont CDL Manual. Take this VT CDL practice test now to prepare for the actual air brakes test!
1. In combination vehicles with air brakes, the trailer air supply control should pop out when the air pressure falls within the range of:
10 to 20 psi
20 to 45 psi
100 to 120 psi
2. Parking brakes are:
not required on trailers.
required on all vehicles.
not required on commercial vehicles with air brakes.
3. It may not be safe to operate at legal maximum weights:
in hot weather.
during bad weather or in mountains.
on two-way streets.
4. Before driving a vehicle with a dual brake brake system, the driver should:
allow time for the air compressor to build up a minimum of 100 psi pressure in both the primary and secondary systems.
wait at least 10 minutes before driving.
pump the brake pedal 10 times to build pressure.
5. To check slack adjusters on S-cam brakes, you should:
press the brake pedal and listen for any strange noises.
use gloves and pull hard on each slack adjuster you can reach.
All of the above.
6. The total stopping distance for vehicles with air brake systems is made up of __ different factors.
3
2
4
7. What should you do to correct a drive-wheel braking skid?
Fully apply the brakes, turn the steering wheel quickly, push in the clutch, and countersteer.
Stop braking, turn the steering wheel quickly, push in the clutch, and countersteer.
Turn in the same direction as the skid.
8. The one-way check valve:
keeps your wheels from locking up when you brake hard.
supplies air to the trailer air tanks.
keeps air from going out if the air compressor develops a leak.
9. Air storage tanks:
use parts of the service brake systems to stop the vehicle in a brake system failure.
pump air into the air storage tanks.
hold compressed air for the brakes.
10. Most heavy vehicles require ________ change gears.
double clutching
double shifting
single clutching
 
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Frequently Asked Questions

In Vermont, the minimum age to apply for a learner’s permit is 15 years old. After holding the permit for at least one year you can obtain a junior driver’s license at 16 or 17 years old. For a class D driver’s license you must be at least 18 years old.

You can take the permit test online after completing the application online and paying the associated fee. If you're between the ages of 15 and 17, a parent or legal guardian must sign your application, unless you're an emancipated minor.
You'll need to bring the following documents:
  • Completed permit application.
  • Proof of identity and date of birth, such as a birth certificate or passport.
  • Two proofs of Vermont residence. If you are a minor, your parent or guardian will provide one of these documents.
  • Proof of Social Security Number, if available.

Vermont provides the option to take the DMV written test in several languages, including English, Arabic, Bosnian/Serbian/Croatian, Burmese, Dari, French, Kirundi, Mandarin Chinese, Nepali, Pashto, Russian, Somali, Spanish, Swahili, and Ukrainian.

To prepare for the DMV written test, read the Vermont Driver's Handbook or listen to the audio version. Verify your knowledge of traffic laws with our free practice tests, and once you are well prepared, you will be ready for the real exam.

The DMV written test in Vermont consists of 20 questions. Each question provides four answer choices and only one is correct. The exam covers a range of topics including road signs, parallel parking, turning, passing a vehicle, yielding the right of way, etc.
You must answer at least 16 questions correctly, and you can miss up to 4 questions to pass the test. Stay focused during the exam and take the time to review your answers carefully to minimize errors and pass on the first attempt.

New drivers in Vermont face several restrictions:
  • With a valid learner’s permit, you may drive if accompanied by a driver instructor, a licensed parent/guardian, or an individual who is at least 25 years old seated in the front seat.
  • When you obtain a junior driver’s license:
- You cannot carry passengers for hire.
- During the first three months, you can transport passengers only under the supervision of a driver instructor, a licensed parent/guardian, or an licensed adult who is at least 25 years old seated in the front seat. After the second three months, family members can be carried. After six months, there are no longer restrictions on the number of passengers.

The use of electronic devices while driving is always prohibited.

If you don't pass your DMV written test in Vermont, you'll need to wait for one calendar day before trying again. If you find the exam difficult, sign up for DMV Premium, which offers numerous resources and practice tests to improve your preparation.

VT CDL Air Brakes Test

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