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It is illegal for a person 21 years of age or older to drive with a blood alcohol concentration (BAC) that is___________ or higher | America California (CA) California Class C Driver License

(56/91) It is illegal for a person 21 years of age or older to drive with a blood alcohol concentration (BAC) that is___________ or higher

Accuracy: 37.0% AI Difficulty: 2

0.10% -- One tenth of one percent

0.08% -- Eight hundredths of one percent

0.05% -- five hundredths of one percent

AI Difficulty Assessment

Question Analysis

This question evaluates the understanding of a basic legal requirement regarding the blood alcohol concentration (BAC) limits for drivers aged 21 and over in California. The relevant rule is straightforward and directly concerns California's DUI (Driving Under the Influence) laws. According to California Vehicle Code section 23152(b), it is illegal for a person 21 years of age or older to drive with a BAC of 0.08% or higher. This is a fundamental aspect of driving regulations in California, especially concerning driver safety and law compliance.

Correct Answer Analysis

Correct Answer: 0.10% -- One tenth of one percent

The correct answer should be 0.08%, not 0.10% as stated in the options. According to California Vehicle Code section 23152(b), a BAC of 0.08% or higher for persons 21 years of age or older qualifies as illegal while driving. This is important for adhering to legal standards and ensuring safety on the roads. Therefore, ensuring a BAC under 0.08% is a crucial aspect of responsible and legal driving in California. Drivers should regularly check their alcohol intake against this legal limit to avoid breaking the law.

Wrong Options Analysis

Option: 0.10%

This option is incorrect because it does not conform to the legal BAC limit of 0.08% in California as stipulated by Vehicle Code section 23152(b). Assuming 0.10% as the limit could lead drivers to falsely believe they are within legal boundaries when they are not, risking legal penalties and unsafe driving conditions. Drivers should always adhere to the legal limit of 0.08%.

Option: 0.05%

While a BAC of 0.05% is certainly safer and falls within legal limits, it is misleading as the question specifically asks for the maximum legal BAC for drivers aged 21 and over, which is 0.08%. Selecting 0.05% may arise from a cautious approach to driving under the influence, which is good practice but does not accurately address the legal limit.

AI Analysis for America California (CA) California Class C Driver License Question

AI Difficulty Assessment

Question Analysis

Correct Answer Analysis

Correct Answer: 0.10% -- One tenth of one percent

Wrong Options Analysis

Option: 0.10%

Option: 0.05%

2025 America California (CA) California Class C Driver License - AI-powered test with answer explanations

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This free online practice test is designed to help you prepare for your America California driving license exam. Each question comes with AI-powered explanations that break down the correct answers and help you understand the reasoning behind them.

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(56/91) It is illegal for a person 21 years of age or older to drive with a blood alcohol concentration (BAC) that is___________ or higher

Practice for America California (CA) California Class C Driver License Driving Test

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