Exam quiz Meteorology - EASA Drone License A2

Question 1

How do intense solar flares and geomagnetic storms (high Kp-index) primarily impact UAS operations?

Accepted Answer

They disrupt the Earth's ionosphere, causing severe GPS/GNSS positioning errors, loss of satellite lock, and compass interference

Answer

They cause the drone's plastic shell to melt

Answer

They create sudden thermal updrafts from the ground

Answer

They drain the LiPo battery in seconds

Question 2

In a METAR, what does the code 'CB' appended to a cloud group (e.g., SCT030CB) indicate?

Accepted Answer

Cumulonimbus clouds, warning the pilot of potential thunderstorms, severe turbulence, and lightning

Answer

Clear Blue sky

Answer

Cirrocumulus Bands

Answer

Cloud Base

Question 3

Aviation weather radar (such as those viewed on aviation apps) is primarily used to detect and track:

Accepted Answer

Precipitation (rain, snow, hail) and its intensity

Answer

Clear air turbulence (CAT)

Answer

The thickness of the ozone layer

Answer

Solar flares

Question 4

If the space weather forecast shows a Kp-index of 6, what is the operational impact?

Accepted Answer

A moderate-to-strong geomagnetic storm is occurring, which can cause significant GPS positioning errors or complete loss of satellite lock

Answer

The air density will be too low to fly

Answer

The video transmission will fail entirely

Answer

The drone's battery will drain in half the normal time

Question 5

What does the term 'Wind Gust' mean in an aviation weather report?

Accepted Answer

A rapid, brief, and sudden increase in wind speed, usually lasting less than 20 seconds, which can severely destabilize a drone

Answer

A steady, constant wind speed lasting for hours

Answer

The wind generated by the drone's own propellers

Answer

A wind blowing strictly vertically

Question 6

What happens if you fly from an area of high atmospheric pressure into an area of low pressure without updating your barometric altimeter?

Accepted Answer

The altimeter will read higher than your true altitude, meaning the drone is physically lower to the ground than the pilot thinks (High to Low, look out below)

Answer

The altimeter will read lower than your true altitude

Answer

The drone's motors will automatically shut down

Answer

The drone will experience a sudden loss of radio signal

Question 7

When wind flows through a narrow mountain valley or a dense group of tall buildings, its speed typically increases. What is this called?

Accepted Answer

The Funneling (or Venturi) Effect

Answer

The Coriolis Effect

Answer

The Thermal Inversion Effect

Answer

The Ground Effect

Question 8

In the Northern Hemisphere, how does the wind flow around a High-Pressure system (Anticyclone) at the surface?

Accepted Answer

Clockwise and spiraling outward

Answer

Counter-clockwise and spiraling inward

Answer

Straight upwards

Answer

Parallel to the equator

Question 9

Why is the anvil (topmost part) of a cumulonimbus cloud dangerous, even if you are miles away from the storm's centre?

Accepted Answer

Strong upper-level winds can carry severe hail out of the anvil, causing it to fall miles ahead of the main storm and potentially destroying a drone in clear air

Answer

It blocks the sun, making it too dark to fly

Answer

It creates a vacuum that pulls the drone upwards

Answer

It emits a high-frequency noise that disrupts the radio controller

Question 10

What type of icing forms when small supercooled water droplets freeze almost instantly upon striking the leading edges of a drone, trapping air and appearing opaque and rough?

Accepted Answer

Rime Ice

Answer

Clear Ice (Glaze)

Answer

Hoar Frost

Answer

Hail

Question 11

What is the recommended action if a drone pilot checks the space weather and sees a Kp-index of 7 or higher?

Accepted Answer

Expect severe GPS degradation or loss of signal; fly with extreme caution in manual/ATTI modes or postpone the flight if precision GNSS is required

Answer

Proceed normally, as it means perfect satellite reception

Answer

Only fly the drone using the 5.8 GHz frequency

Answer

Attach a heavier payload to stabilize the drone

Question 12

If a METAR reports '+RA', the pilot should expect:

Accepted Answer

Heavy Rain, which can degrade visibility, overwhelm the drone's weather sealing, and add water weight to the airframe

Answer

Light Rain

Answer

No Rain

Answer

Freezing Rain

Question 13

What is the 'Lapse Rate'?

Accepted Answer

The rate at which atmospheric temperature decreases with an increase in altitude

Answer

The rate at which the drone's battery depletes

Answer

The speed of the wind at 10,000 feet

Answer

The time it takes for fog to clear

Question 14

Under what conditions is 'Radiation Fog' most likely to form?

Accepted Answer

On clear, calm nights when the ground rapidly cools the moist air immediately above it to its dew point

Answer

On warm, windy afternoons over the ocean

Answer

When a cold wind blows over a warm lake

Answer

During the passage of a violent cold front

Question 15

During a clear, calm night in a mountainous area, how does the local wind typically behave?

Accepted Answer

Cold, dense air flows down the mountain slopes into the valleys (katabatic or mountain breeze)

Answer

Warm air rushes up the slopes from the valleys (anabatic breeze)

Answer

The wind blows perfectly horizontal to the peaks

Answer

There is a complete vacuum of air

Question 16

Gliders and certain drones can gain altitude without motor power by flying into 'Thermals'. What characterizes a thermal?

Accepted Answer

A localized column of warm air rising due to convective solar heating of the ground

Answer

A horizontal gust of wind

Answer

A sudden downdraft of cold air

Answer

An area of high atmospheric pressure

Question 17

What is 'Altimeter Setting'?

Accepted Answer

The value to which the barometric altimeter is calibrated to indicate a specific altitude (e.g., QNH for altitude above sea level)

Answer

The color of the altimeter dial

Answer

The GPS coordinates of the drone

Answer

The physical placement of the sensor inside the drone

Question 18

When is 'Thermal Turbulence' generally most intense?

Accepted Answer

On clear, hot summer afternoons when the sun strongly heats the Earth's surface, causing localized columns of warm air to rise rapidly

Answer

During the middle of the night

Answer

During cold winter rainstorms

Answer

When a thick fog layer is present

Question 19

If a METAR reports a temperature of 10 °C and a dew point of 10 °C (T/DP spread is zero), what should a remote pilot expect?

Accepted Answer

The air is 100% saturated, meaning fog, low clouds, or precipitation are highly likely or already present

Answer

Clear, dry air with excellent visibility

Answer

A severe thunderstorm

Answer

High-altitude clear air turbulence

Question 20

Why is knowing the 'Freezing Level' altitude critical for winter drone operations?

Accepted Answer

Flying into visible moisture (clouds/fog) at or above this altitude will result in rapid structural icing, which destroys lift and causes crashes

Answer

It tells the pilot when the battery will shut down

Answer

It determines how fast the drone can fly

Answer

It is where the airspace automatically becomes Class A

Question 21

What type of weather is typically associated with the passage of a fast-moving cold front?

Accepted Answer

Sudden development of towering cumulus or cumulonimbus clouds, heavy rain showers, squalls, and potential thunderstorms, followed by a drop in temperature

Answer

Days of continuous, light drizzle

Answer

Clear, completely cloudless skies

Answer

Widespread radiation fog

Question 22

At the end of a METAR report, the code 'NOSIG' implies:

Accepted Answer

No Significant change in the weather conditions is expected in the next 2 hours

Answer

No Signal received from the weather station

Answer

No Significant clouds below 10,000 feet

Answer

Not Safe for IFR Gliding

Question 23

According to the International Standard Atmosphere (ISA), what is the standard temperature at Mean Sea Level?

Accepted Answer

15 °C

Answer

0 °C

Answer

10 °C

Answer

20 °C

Question 24

What is a 'Microburst'?

Accepted Answer

A sudden, intense, localized downdraft of air associated with a thunderstorm that spreads out violently upon hitting the ground

Answer

A small, localized thermal updraft

Answer

A gentle rain shower without wind

Answer

A minor electrical short circuit in the drone's motors

Question 25

In a METAR, what does the code 'FG' indicate?

Accepted Answer

Fog (visibility is less than 1,000 metres)

Answer

Freezing Gusts

Answer

Fair Gusts

Answer

Falling Graupel

Question 26

How does surface friction affect the wind near the ground compared to the 'geostrophic wind' at higher altitudes?

Accepted Answer

It slows the wind down and causes it to blow slightly across the isobars toward areas of lower pressure

Answer

It speeds the wind up and makes it blow parallel to the isobars

Answer

It has no effect on wind direction or speed

Answer

It forces the wind to blow strictly vertically

Question 27

Why is 'Clear Air Turbulence' (CAT) particularly dangerous in aviation?

Accepted Answer

It is severe turbulence that occurs in cloudless regions, meaning pilots have no visual warning (like clouds) before encountering it

Answer

It causes sudden rain without warning

Answer

It only happens at night

Answer

It freezes the drone's motors instantly

Question 28

When looking at a weather chart, what does the presence of isobars spaced very closely together in a specific region indicate?

Accepted Answer

A strong pressure gradient, which results in high-intensity winds

Answer

An area of dead calm with a total absence of wind

Answer

An area with constant temperatures and high visibility

Answer

The imminent end of a cyclonic disturbance

Question 29

What is a 'Foehn Wind' (or Chinook)?

Accepted Answer

A warm, dry, and often gusty downslope wind that occurs on the leeward (downwind) side of a mountain range

Answer

A freezing, wet wind blowing off an ocean

Answer

A wind that only blows at the equator

Answer

A localized tornado

Question 30

In an aviation weather report, what does the cloud coverage term 'FEW' indicate?

Accepted Answer

1 to 2 oktas (eighths) of the sky is covered by clouds

Answer

3 to 4 oktas of the sky is covered

Answer

5 to 7 oktas of the sky is covered

Answer

The sky is completely clear

Exam simulation Meteorology - EASA Drone License A2

Exam simulation EASA Drone A2 License Meteorology 30 questions on 30 minutes

Exam simulation Meteorology - EASA Drone License A2

Exam simulation EASA Drone A2 License Meteorology 30 questions on 30 minutes

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