Pennsylvania DMV CDL Air Brakes Quick Practice Test

Pennsylvania DMV CDL Air Brakes Quick Practice Test For 2024

CDL Class A, B or C. Complete CDL driver training course. All the questions in this test are from the official DMV written exam. You can use our free online tests to evaluate how likely you are to pass the official DMV test. Or you can just cut to the chase and increase your chances of passing by upgrading to Premium Membership and unlock official DMV tests. In addition, you will also receive a master cheat sheet which contains all your state’s DMV questions and answers. Premium membership also unlocks a smart tracker which keeps an inventory of all incorrectly answered questions for easy, fast and effective revision. Practice with our free tests or hit Upgrade button below for premium access and increase your chances of passing your DMV written exam.

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Quick Facts:

Number of Questions – 20

Passing Percentage – 80%

Test Type – Free Test

1. If the spring brakes are on, you should:

Not use the brake pedal.
Press the accelerator.
Move the steering wheel.
Be especially careful because the brakes may fail.

2. Air brakes use ____ to function.

Compressed air
Liquid nitrogen
Carbon dioxide

3. Where is the safety relief valve usually located?

Near the rear brake
Near the front brake
In an air tank
On the dashboard

4. Air tank drains:

Allow rain water to enter an air tank.
Are used to drain water and oil from an air tank.
Should never be opened.
Must remain open during driving.

5. What does an air compressor do in an air brake system?

It pumps air into the air storage tanks.
It fills the tires.
It moves air to the back of the truck.

6. You should not use the parking brake:

If your vehicle is stopped on a level surface.
If your vehicle is stopped on a slight incline.
If your vehicle's brakes are very hot.
If your vehicle's other braking systems seem to be working adequately.

7. If using spring brakes when hauling a heavy load, a complete stop will:

Be impossible.
Take a long time.
Take a short amount of time.

8. If a vehicle has air brakes, the air compressor drive belt should be checked before each drive. The belt should be:

Loosely attached.
Tight.
Cracked.
Frayed.

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