The effects of alcohol are magnified at altitude because:

the cabin is pressurised to sea level

reduced oxygen partial pressure combines with alcohol's depressant effects

Correct

alcohol evaporates faster

cabin air is recycled

Explanation

At cabin altitude (typically 6000-8000 ft), the reduced oxygen enhances alcohol's impairment of the brain and nervous system.

Test yourself with random questions from Human Performance and all other ATPL subjects.