Free CDL Quiz

What is the legal blood alcohol concentration (BAC) limit for a CDL driver operating a commercial motor vehicle?

a.0.08%
b.0.06%
c.0.02%
d.0.04%

Explanation

The legal BAC limit for CDL holders operating a commercial motor vehicle is 0.04%, which is half the limit for non-commercial drivers in most states.

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About the CDL Exam

The CDL (Commercial Driver License) exam tests your knowledge of commercial driving rules, safety procedures, and vehicle operation. You must score 80% or higher to pass the written knowledge test. The exam covers general knowledge, air brakes, combination vehicles, and various endorsements.

This question is from the Class B CDL Knowledge Test #1 section. Practice with more questions from this category to build confidence before taking the official DMV test.

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