Idaho DMV CDL General Knowledge Quick Practice Test 1 For 2025

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.

99.5% Pass Rate

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Quick Facts:

Number of Questions – 20

Passing Percentage – 80%

Test Type – Free Test

1. After starting the engine, the Anti-Lock Braking System (ABS) light stays on if:

2. Most drivers are the least alert:

3. You should not use the parking brake:

4. What color are ABS malfunction lamps?

5. Air tank drains should:

6. An open automobile window in cold weather may indicate that the driver is:

7. A truck may need to be under the legal maximum weight limit when being driven:

8. You should specifically look out for black ice: