Exam quiz Meteorology - EASA Drone License A2

Question 1

How is 'Upslope Fog' formed?

Accepted Answer

When moist, stable air is forced up a sloping landmass (like a mountain) by the wind, cooling adiabatically until it reaches its dew point

Answer

By the sun heating a wet runway

Answer

By thunderstorms evapourating before hitting the ground

Answer

By high winds at altitudes above 20,000 ft

Question 2

What instrument is used to measure Relative Humidity?

Accepted Answer

Hygrometer

Answer

Anemometer

Answer

Altimeter

Answer

Tachometer

Question 3

What is the cloud coverage (in oktas) for an 'OVC' (Overcast) sky?

Accepted Answer

8 oktas (the sky is completely covered)

Answer

1 to 2 oktas

Answer

3 to 4 oktas

Answer

5 to 7 oktas

Question 4

Regarding thunderstorms, which statement about lightning is true and highly relevant to drone pilots?

Accepted Answer

Lightning can strike the ground miles away from the main cumulonimbus cloud (even outside the rain area), posing a lethal threat to the pilot and the drone

Answer

Lightning only strikes directly beneath the darkest part of the cloud

Answer

Drones are completely immune to lightning because they have no direct connection to the ground

Answer

Lightning only occurs when the temperature is above 20°C

Question 5

Under what conditions does 'Hoar Frost' form on an aircraft or drone?

Accepted Answer

When the surface of the aircraft is below freezing and below the dew point of the surrounding air, causing water vapour to deposit directly as ice crystals (sublimation)

Answer

When rain freezes immediately upon hitting a warm surface

Answer

When flying through a cloud of supercooled water droplets at 10 °C

Answer

When the drone flies too fast in dry air

Question 6

If a strong wind blows perpendicular to a mountain ridge, what dangerous meteorological phenomenon can form on the leeward (downwind) side?

Accepted Answer

Mountain waves and rotor clouds, which contain severe turbulence and strong downdrafts

Answer

Radiation fog

Answer

A sudden drop in atmospheric pressure to a vacuum

Answer

Sea breezes

Question 7

A remote pilot is conducting a mapping mission, moving from a high-pressure area to a low-pressure area. If they do not recalibrate the barometric sensor, what risk do they face regarding the displayed altitude?

Accepted Answer

The altimeter will display a value higher than the actual altitude, potentially leading the pilot to descend dangerously into ground obstacles

Answer

The altimeter will indicate a lower altitude than actual, leading the drone to fly too high into controlled airspace

Answer

The drone will lose its GPS signal due to the change in atmospheric density

Answer

The battery will drain faster because of the reduced pressure

Question 8

How does 'Precipitation-Induced Fog' (or Frontal Fog) typically form?

Accepted Answer

When relatively warm rain falls through a cooler layer of air near the ground, evapourating and saturating the cool air until fog forms

Answer

By the rapid freezing of a lake

Answer

By high winds stirring up dust

Answer

By pollution trapped in a city

Question 9

How does the Coriolis effect behave at the Earth's equator?

Accepted Answer

It is effectively zero, meaning winds do not get deflected by planetary rotation at the equator

Answer

It is at its absolute maximum strength

Answer

It pulls air directly into space

Answer

It causes water to drain counter-clockwise in sinks

Question 10

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 11

How does the 'Funneling Effect' (or Venturi Effect) alter the wind?

Accepted Answer

When wind is forced through a narrow space, like a mountain pass or between tall buildings, its velocity increases significantly

Answer

It makes the wind blow in circles

Answer

It cools the wind down to freezing temperatures

Answer

It completely stops the wind from moving

Question 12

In meteorology, a 'Cold Front' is defined as:

Accepted Answer

The leading edge of a cooler mass of air replacing at ground level a warmer mass of air

Answer

A stationary cloud layer in winter

Answer

The area where a warm air mass overrides a cold air mass

Answer

A sudden drop in temperature during the night

Question 13

Why is 'Clear Ice' (Glaze) considered highly dangerous for aircraft and UAVs?

Accepted Answer

It is heavy, forms a solid, hard-to-remove transparent layer that severely disrupts the aerodynamic shape of the airfoil, reducing lift and increasing weight

Answer

It causes the battery to overheat

Answer

It blinds the optical sensors with bright reflections

Answer

It makes the drone invisible to radar

Question 14

On a sunny day, which of the following surfaces will absorb heat the fastest and generate the strongest thermal updrafts?

Accepted Answer

A dark asphalt parking lot or a freshly plowed dirt field

Answer

A deep, calm lake

Answer

A dense, green forest

Answer

A snow-covered field

Question 15

If you read a METAR and see the cloud group 'OVC045', what does this mean?

Accepted Answer

Overcast sky with the cloud base at 4,500 feet Above Ground Level (AGL)

Answer

Scattered clouds at 450 feet

Answer

Overcast clouds moving at 45 knots

Answer

Visibility is limited to 45 metres

Question 16

What is 'Frontal Lift'?

Accepted Answer

The process where a warmer, lighter air mass is forced to rise over a colder, denser air mass, leading to widespread cloud formation and precipitation

Answer

The lifting of a drone's nose by adjusting the front propellers

Answer

The lifting of fog by the morning sun

Answer

The air pushed upwards by a heavy jet taking off

Question 17

In a METAR report, what does the abbreviation 'VCTS' stand for?

Accepted Answer

Thunderstorms in the Vicinity (within 8 to 16 km of the aerodrome reference point)

Answer

Very Clear and Tranquil Skies

Answer

Variable Cloud Thickness Status

Answer

Visibility Cleared To South

Question 18

Which cloud type is characterized as high-altitude, wispy, and composed entirely of ice crystals?

Accepted Answer

Cirrus

Answer

Stratus

Answer

Cumulus

Answer

Nimbostratus

Question 19

In a TAF (Terminal Aerodrome Forecast), what does the abbreviation 'BECMG' signify?

Accepted Answer

Becoming; it indicates a regular or irregular change to the forecasted weather conditions, expected to take place over a period of time (usually about 2 hours)

Answer

A completely clear sky

Answer

A sudden, immediate emergency

Answer

Below Minimum Cloud Grade

Question 20

In a METAR report, what does the descriptor 'SH' mean?

Accepted Answer

Showers (e.g., SHRA means Rain Showers)

Answer

Snow and Hail

Answer

Shallow Fog

Answer

Severe Hazard

Question 21

Why is 'Virga' considered a visual warning sign for pilots?

Accepted Answer

It indicates precipitation that is evapourating before it hits the ground, which cools the air rapidly and can create sudden, violent downdrafts (microbursts)

Answer

It means the drone's camera lens is dirty

Answer

It shows that the airspace is currently closed

Answer

It means a solar flare is currently disrupting GPS

Question 22

What is 'Wake Turbulence'?

Accepted Answer

Severe aerodynamic disturbances, primarily wingtip vortices, left behind a heavier aircraft in flight, posing a massive hazard to light drones

Answer

Turbulence caused by water evapourating from a lake

Answer

Turbulence generated by solar radiation on black asphalt

Answer

The vibration felt when a drone lands hard

Question 23

An 'Absolutely Stable' atmosphere is characterized by:

Accepted Answer

A temperature lapse rate that is less than the moist adiabatic lapse rate, meaning any displaced air parcel will tend to return to its original position (resists upward motion)

Answer

Continuous, severe thunderstorms

Answer

Winds exceeding 50 knots

Answer

A complete absence of clouds forever

Question 24

If an air mass is pushed up a mountain and its temperature drops below its dew point, what happens?

Accepted Answer

The invisible water vapour condenses into visible water droplets, forming clouds and potentially precipitation (Orographic lifting)

Answer

The air mass instantly becomes a jet stream

Answer

The air becomes perfectly dry and clear

Answer

The air mass catches fire

Question 25

If a METAR states 'LIRF 151250Z 32015KT 9999 FEW030 18/10 Q1012', what is the temperature and dew point?

Accepted Answer

Temperature 18 °C, Dew point 10 °C

Answer

Temperature 32 °C, Dew point 15 °C

Answer

Temperature 99 °C, Dew point 99 °C

Answer

Temperature 10 °C, Dew point 12 °C

Question 26

In aviation, what does 'RVR' stand for?

Accepted Answer

Runway Visual Range; the horizontal distance a pilot on the centre line of a runway can see the runway surface markings or lights

Answer

Radar Vector Routing

Answer

Relative Velocity Ratio

Answer

Rapid Vertical Rise

Question 27

How does 'Advection Fog' typically form?

Accepted Answer

When moist, warm air is blown horizontally over a colder surface (like cold water or snow) and cools to its dew point

Answer

When a thunderstorm collapses

Answer

By the rapid heating of a concrete runway

Answer

Only at altitudes above 10,000 feet

Question 28

If you see the code 'OVC005' in a METAR, how high is the cloud ceiling?

Accepted Answer

500 feet Above Ground Level (AGL)

Answer

50 feet Above Ground Level (AGL)

Answer

5,000 feet Mean Sea Level (MSL)

Answer

5 miles high

Question 29

Which air mass is physically lighter (less dense) at the same temperature and pressure?

Accepted Answer

Humid air (because water vapour molecules weigh less than the nitrogen and oxygen molecules they replace)

Answer

Dry air

Answer

They have the exact same density

Answer

Cold air

Question 30

According to the International Standard Atmosphere (ISA), what is the standard atmospheric pressure at mean sea level?

Accepted Answer

1013.25 hPa

Answer

1000.00 hPa

Answer

1025.13 hPa

Answer

995.50 hPa

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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