District of Columbia DMV CDL General Knowledge Quick Practice Test 1 For 2022

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. Water and compressor oil are usually found in the compressed air within an air brake system. Water and compressor oil:

2. When making a turn, you do not need to:

3. Tires with tread separation are:

4. When leaving your vehicle unattended:

5. When making a turn, when should you cancel your turn signal?

6. When turning, when should the turn signal be canceled?

7. When backing with a trailer, turning toward the driver’s side is encouraged:

8. What should happen before the air pressure in an air brake system tank falls below 55 psi?