What is blood alcohol content (BAC)?
Quick Answer
Blood alcohol content (BAC) measures the percentage of alcohol in your bloodstream. A BAC of 0.08% means 0.08 grams of alcohol per 100 milliliters of blood. The legal limit for adult drivers in all US states is 0.08%. Even below this limit, alcohol impairs driving ability.
Explanation
Blood alcohol content (BAC) measures the percentage of alcohol in your bloodstream. A BAC of 0.08% means 0.08 grams of alcohol per 100 milliliters of blood. The legal limit for adult drivers in all US states is 0.08%. Even below this limit, alcohol impairs driving ability. Understanding this concept is essential for safe driving and will help you answer similar questions on the DMV written test.
Why This Matters on the DMV Test
Questions about Safe Driving are among the most common on the permit test. Knowing the correct answer helps you pass your exam and stay safe on the road. Most states require a score of 70–83% to pass.
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