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Why do the rules forbid a driver from reporting for duty with a blood alcohol level of 0.02 or higher even though the disqualification level is 0.04?
- A.0.02 applies only to pilots, not drivers
- B.Because impairment of judgment and reaction begins well below 0.04, so the rules remove the driver from safety-sensitive work before the legal limit is reached
- C.Any reading at all results in lifetime disqualification
- D.The two numbers are a printing error
Correct answer
B. Because impairment of judgment and reaction begins well below 0.04, so the rules remove the driver from safety-sensitive work before the legal limit is reached
Why
The system is built in layers: measurable alcohol gets you removed for the day, and 0.04 gets you disqualified. Both layers exist because crash risk starts rising with the first drinks, not at the legal line.
Manual topic: Alcohol and Drugs - Test Results · From the General Knowledge practice bank (GK-195).