← All explained questions · Supplemental · I — Preflight Preparation
For VFR cross-country planning, the recommended fuel reserves per 14 CFR 91.151 are
Choices
20 minutes by day, 30 minutes by night.
Both numbers are too low.
✓ 30 minutes by day, 45 minutes by night.correct
measured as fuel that would still be in tanks after reaching the FIRST point of intended landing at normal cruise speed. 14 CFR 91.151: VFR fuel reserves require, at the first point of intended landing, fuel for at least 30 minutes (day) or 45 minutes (night) of additional flight at normal cruise. Many CFIs teach 1 hour as a personal minimum because 30 min is razor-thin. IFR (91.167) is 45 minutes after destination/alternate.
1 hour day or night.
1 hour is a personal minimum, not the regulation.
10% of total trip fuel.
Reserves are time-based, not percentage-based.
Why
measured as fuel that would still be in tanks after reaching the FIRST point of intended landing at normal cruise speed. 14 CFR 91.151: VFR fuel reserves require, at the first point of intended landing, fuel for at least 30 minutes (day) or 45 minutes (night) of additional flight at normal cruise. Many CFIs teach 1 hour as a personal minimum because 30 min is razor-thin. IFR (91.167) is 45 minutes after destination/alternate.
FAA source: 14 CFR §91.151(a), VFR fuel requirements (day)browse the reference library →
Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question.