CPL Human Factors · Mock exam

A pilot drinks 4 standard drinks (10g alcohol each) over 3 hours, then stops drinking. Approximately how long after the last drink would their BAC return to 0.02% (the aviation limit)?

• A.alcohol is metabolised and fully eliminated the moment the person subjectively begins to feel sober again
• B.1 hour after stopping
• C.8 hours after the first drink regardless of amount consumed
• D.about 2–3 hours after the last drink for the average adult (roughly 0.015% BAC per hour)