SkyDrill

Alcohol amount that impairs vision

Remote Pilot (Part 107) practice question 1 of 20 on Operations / Physiology. ACS element UA.V.E.K6 · difficulty: recall. Want to answer it in a timed quiz? Use the Remote Pilot (Part 107) practice mode.

Question bank updated 2026-09-22

QUESTIONAccording to the Remote Pilot Study Guide, impairments in vision and hearing can occur after consuming how much alcohol?

  1. AOnly after three or more drinks
  2. BOnly at a blood alcohol level of .04 percent or greater
  3. CAs little as one drink
Show the answer and explanation

Correct answer: C. As little as one drink

  • A — incorrect The study guide does not set a three-drink threshold; it says as little as one drink can impair vision and hearing.
  • B — incorrect The .04 percent figure is the regulatory limit for flying; the study guide says vision and hearing impairment can begin with a single drink, well before that level.
  • C — correct The study guide states that impairments in vision and hearing can occur from consuming as little as one drink, and that alcohol in small amounts can constrict the visual field.

BACKGROUND

The Remote Pilot Study Guide explains that alcohol impairs the efficiency of the human body, and even small amounts can impair judgment, affect coordination, constrict the visual field, diminish memory, reduce reasoning ability, and lower attention span. As little as one ounce of alcohol can decrease the speed and strength of muscular reflexes, lessen the efficiency of eye movements while reading, and increase the frequency of errors. Impairments in vision and hearing can occur from consuming as little as one drink. Because vision is the remote pilot's primary tool for seeing and avoiding other aircraft, these effects bear directly on safety.

STUDY TIP

Remember that visual impairment begins with a single drink, long before the .04 percent regulatory limit.

KEY POINTS

  • One drink can impair vision and hearing.
  • Small amounts of alcohol constrict the visual field and slow eye movements.
  • One ounce of alcohol reduces the speed and strength of reflexes.

SOURCES

  • remote_pilot_study_guide.txt ch9 "Alcohol"
Practice the Remote Pilot (Part 107) test →Timed 60-question exam, by ACS area, or review your misses. Free.
MORE ON OPERATIONS / PHYSIOLOGY

SkyDrill is not affiliated with the FAA. This is an original practice item based on 14 CFR part 107, 14 CFR part 89, and the FAA Remote Pilot – Small UAS Study Guide (FAA-G-8082-22). Regulations and handbooks are revised; confirm details against the current edition.