Practice Test Geeks(UAS) Unmanned Aircraft Systems Certified Practice Test
← All UAS Flashcard Decks

Weather Assessment Flashcards

7 cards from real UAS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Weather Assessment flashcards as text

  1. Which weather service product should a remote pilot consult for graphical depictions of current and forecast wind at various altitudes?

    Answer: Winds and Temperatures Aloft Forecast (FB)

    The Winds and Temperatures Aloft Forecast (FB) provides forecast wind direction, speed, and temperature at specific altitude levels.

  2. What is 'density altitude' and when is it a concern for sUAS pilots?

    Answer: Pressure altitude corrected for non-standard temperature; concern on hot, high, humid days when air is less dense

    Density altitude is the altitude in the standard atmosphere that corresponds to the actual air density; high density altitude means thin air and degraded performance.

  3. A remote pilot notices frost forming on a sUAS that has been stored overnight in a cold hangar. Before flight, the pilot should:

    Answer: Remove all frost completely before flight as it disrupts aerodynamic surfaces

    Frost disrupts smooth airflow over aerodynamic surfaces and rotors, degrading lift and potentially causing control issues — it must be removed before flight.

  4. What is a 'microburst' and why is it extremely hazardous?

    Answer: A brief intense downburst of air covering less than 2.5 miles that causes violent wind shear

    A microburst is a concentrated downburst producing intense diverging winds at the surface that create sudden severe wind shear and turbulence.

  5. Under what surface temperature and clear sky conditions is radiation fog most likely to form by early morning?

    Answer: Cold clear calm nights allowing maximum radiational cooling of the surface

    Radiation fog forms on clear calm nights when the ground rapidly loses heat to space, cooling the overlying air to the dew point.

  6. Which METAR sky condition code indicates a cloud layer covering 5/8 to 7/8 of the sky?

    Answer: BKN (Broken)

    BKN (Broken) indicates 5/8 to 7/8 sky coverage and constitutes a ceiling if it is the lowest layer.

  7. A Convective SIGMET (WST) is automatically triggered when which conditions exist?

    Answer: Severe thunderstorms with surface winds ≥50 knots, hail ≥3/4 inch, or embedded/line of thunderstorms covering ≥3,000 square miles

    Convective SIGMETs are issued for severe thunderstorms meeting specific intensity thresholds or organized convective systems covering large areas.