Part 107 Plan

Weather: practice questions

4 original questions · 0 editor-approved · every choice explained.

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Blueprint-mapped questions with full rationales for every choice.

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WeatherDifficulty 2/5

In the METAR 'KDEN 211753Z 08012G20KT 10SM SCT045 BKN110 18/M02 A3011', what is the ceiling?

  1. A4,500 ft AGL
  2. B11,000 ft AGL
  3. CNo ceiling; sky is scattered
  4. D110 ft AGL
Show answer and rationale

Correct: B. A ceiling is the lowest broken (BKN) or overcast (OVC) layer or vertical visibility. SCT045 is scattered (not a ceiling); BKN110 is broken at 11,000 ft AGL, so that is the ceiling.

  • A — Scattered layers do not constitute a ceiling.
  • C — A broken layer is present, so there is a ceiling.
  • D — Cloud heights are in hundreds of feet: 110 = 11,000 ft.
WeatherDifficulty 2/5

The METAR wind group '08012G20KT' means:

  1. AWind from 080° magnetic at 12 mph
  2. BWind variable at 12 kt
  3. CWind from 080° true at 12 kt, gusting to 20 kt
  4. DWind from 120° at 8 kt, gusting 20
Show answer and rationale

Correct: C. METAR winds are reported as true direction (first three digits) and speed in knots, with G indicating gusts: from 080° at 12 knots gusting 20.

  • D — Direction is the first three digits (080).
  • A — METAR winds are true, not magnetic, and in knots.
  • B — Variable winds are shown as VRB.
WeatherDifficulty 3/5

Which combination produces the highest density altitude and the poorest sUAS performance?

  1. AHigh pressure and low humidity at sea level
  2. BCold, dry air at high pressure
  3. CLow temperature, low elevation, high pressure
  4. DHigh temperature, high elevation, low pressure, high humidity
Show answer and rationale

Correct: D. Density altitude increases with heat, elevation, low pressure and humidity; thinner air reduces rotor lift and motor cooling, shortening endurance and climb capability.

  • C — Those conditions lower density altitude.
  • A — High pressure lowers density altitude.
  • B — Cold dense air improves performance.
WeatherDifficulty 2/5

A METAR reports temperature 12 °C and dew point 12 °C at dawn with calm winds. What should the remote PIC expect?

  1. AFog or very low cloud forming, threatening visibility and VLOS
  2. BThunderstorms
  3. CHigh density altitude
  4. DStrong turbulence
Show answer and rationale

Correct: A. When the temperature–dew point spread approaches zero, air is saturated and fog forms — especially radiation fog on calm, clear nights. This threatens the 3 SM visibility minimum and VLOS.

  • D — Calm winds do not produce strong turbulence.
  • B — Thunderstorms need instability and lifting, not indicated here.
  • C — 12 °C is cool; density altitude is not the concern.

Primary references

  1. Remote Pilot – Small Unmanned Aircraft Systems Airman Certification Standards (FAA-S-ACS-10B, April 2021) — Federal Aviation Administration (FAA) · government · retrieved 2026-09-21, verified 2026-09-21
  2. Advisory Circular 00-45H, Aviation Weather Services (METAR/TAF formats) — Federal Aviation Administration (FAA) · government · retrieved 2026-09-21, verified 2026-09-21