⚖ Operations · FAA Aeronautical Information Manual, FAA UAG Sample Question 20OPS-017 · 187 of 261

Which is true regarding the presence of alcohol within the human body?

AA person may be more susceptible to hypoxia when they have consumed alcohol.✓

BAn individual can accurately determine their level of impairment based on how they feel.

CAlcohol does not affect judgment, but does affect motor skills.

Why →Alcohol and hypoxia have compounding effects. Alcohol reduces the body's ability to use oxygen at the cellular level, and the effects of altitude (lower partial pressure of oxygen) are more pronounced when alcohol is present. Even small amounts of alcohol can simulate the effects of several thousand feet of additional altitude.

The trap →Alcohol impairs self-assessment. People consistently believe they are less impaired than they are. This makes the claim that a person can judge impairment by how they feel dangerously wrong. Alcohol impairs judgment before it affects motor skills. The claim that alcohol spares judgment but affects motor skills reverses the sequence.

Field note →The Part 107 alcohol rules: 8-hour "bottle to throttle" minimum, blood alcohol content below 0.04%, and no flying while under the influence regardless of time elapsed. A BAC of 0.04% is half the DUI driving limit. Aviation standards are stricter.

SOURCE → FAA Aeronautical Information Manual, FAA UAG Sample Question 20CHECKED JUL 16ACS V.D.K1MED

▶ Try it in a drill all operations questions →browse all 261 →report an issue

← OPS-016 OPS-018 →