Sample questions
Human performance
A free preview of real exam-style questions for this topic — each with the correct answer, an explanation, and the official source it is based on.
01What does the letter "S" stand for in the IMSAFE self-check?
- Stress. — Correct answer
- Speed.
- Safety.
- Skill.
IMSAFE = Illness, Medication, Stress, Alcohol, Fatigue, Eating. "S" stands for Stress.
02How many hours before flight is alcohol prohibited ("bottle to throttle")?
- 2 hours.
- 8 hours. — Correct answer
- 24 hours.
- 12 hours.
The "bottle to throttle" rule is 8 hours. In practice a longer interval is recommended depending on the amount consumed.
EASA Easy Access Rules — Human performance, alcohol↗; ICAO Annex 203Why can one pilot not maintain FPV (in goggles) and VLOS at the same time?
- Because the camera does not transmit HDR.
- Because the FPV signal is weaker than WiFi.
- Because the goggles block the view of the surrounding airspace. — Correct answer
- Because the goggles drain battery power.
FPV goggles obstruct the natural view of the UAS and surrounding airspace. Hence in Open category FPV is allowed only with a UAS observer next to the pilot.
04What visual effect arises from prolonged looking at empty sky without a fixation point?
- Tunnel vision (reduced peripheral attention).
- Brightness adaptation (improved night vision).
- Colour constancy.
- Empty-field myopia — the eye refocuses to ~1–2 m, missing distant objects. — Correct answer
Empty-field myopia is a well-documented effect: without a fixation point the eye focuses near, which makes distant objects (including the drone) hard to detect. Active scanning prevents it.
FAA AC 60-22↗; Vision and perception05What to do if IMSAFE flags "F — fatigue" with only 4 h of sleep?
- Postpone the flight or rely on a rested observer. — Correct answer
- Drink coffee and start flying.
- Fly — fatigue does not affect a remote pilot.
- Take a 30-minute nap and start flying.
Fatigue degrades reaction time and attention. Professional discipline calls for postponing the flight — caffeine does not replace sleep.
06A pilot arrives at a commercial job and discovers the primary controller battery is dead. Only an unfamiliar backup controller is available. What type of stress is this?
- Chronic stress.
- Technical stress. — Correct answer
- Acute stress.
- This situation does not cause significant stress for experienced pilots.
Technical stress arises from unfamiliar or malfunctioning technical equipment — a new drone model, device failure, unexpected hardware change. An unfamiliar backup controller is technical stress. It affects even experienced pilots, which is why IMSAFE must be assessed before every flight.
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