Exam quiz Meteorology - EASA Drone License A2

Question 1

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 2

In a TAF or METAR, the code 'FM' stands for:

Accepted Answer

From; indicating a rapid and significant change in weather conditions occurring at a specific time

Answer

Frequent Moisture

Answer

Foggy Morning

Answer

Fast Movement

Question 3

The sequence of clouds typically observed ahead of an approaching warm front is:

Accepted Answer

Cirrus, thickening to Cirrostratus, then Altostratus, and finally Nimbostratus bringing steady rain

Answer

Cumulus, followed by Cumulonimbus

Answer

Fog, followed by clear skies

Answer

Stratus clouds immediately followed by a tornado

Question 4

What does 'Adiabatic cooling' mean in meteorology?

Accepted Answer

The cooling of an air parcel as it rises and expands due to lower atmospheric pressure, without transferring heat to its surroundings

Answer

Cooling caused by rain falling on the drone

Answer

Cooling caused by flying into a shadow

Answer

The freezing of a lake surface

Question 5

What is the fundamental cause of global atmospheric circulation and wind?

Accepted Answer

Uneven heating of the Earth's surface by the sun, leading to pressure differences

Answer

The gravitational pull of the ocean tides

Answer

The rotation of the moon around the Earth

Answer

Magnetic anomalies at the North and South poles

Question 6

Why is checking NOTAMs critical for a drone pilot's weather planning?

Accepted Answer

NOTAMs may contain warnings about temporary meteorological hazards, such as the release of weather balloons or the erection of temporary meteorological masts in the flight area

Answer

NOTAMs contain the exact battery temperature limits

Answer

NOTAMs replace the need for a compass calibration

Answer

NOTAMs dictate how fast the drone is legally allowed to fly

Question 7

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 8

In a METAR report, what does the term 'CAVOK' stand for?

Accepted Answer

Ceiling And Visibility OK (Visibility 10km or more, no clouds below 5000 ft or Minimum Sector Altitude, and no significant weather)

Answer

Clouds And Visibility Over Kilometers

Answer

Clear Air Visual Operational Knowledge

Answer

Current Air Velocity OK

Question 9

What is the primary danger of 'Wind Shear' to a drone during takeoff or landing?

Accepted Answer

A sudden loss of airspeed and lift can cause the drone to stall and crash into the ground before the motors can spool up to compensate

Answer

It drains the battery by creating a vacuum

Answer

It causes the drone's compass to lose north

Answer

It cuts the radio signal from the remote

Question 10

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 11

Due to the pressure gradient force, air naturally flows:

Accepted Answer

From areas of high pressure to areas of low pressure

Answer

From areas of low pressure to areas of high pressure

Answer

Directly towards the equator at all times

Answer

Only upwards

Question 12

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 13

If you are flying a multirotor and experience a sudden, strong updraft from a thermal, what is the expected initial reaction of the drone?

Accepted Answer

The drone will rapidly gain altitude; the flight controller will then reduce motor RPM to compensate and bring it back down to its target altitude

Answer

The drone will pitch forward

Answer

The drone will suddenly drop towards the ground

Answer

The drone will turn off completely

Question 14

What does the term 'Absolute Altitude' mean?

Accepted Answer

The actual vertical distance between the aircraft and the surface of the ground directly below it (Height Above Ground Level - AGL)

Answer

Altitude above mean sea level (MSL)

Answer

Altitude above the standard pressure datum (1013.25 hPa)

Answer

The highest altitude the drone is technically capable of reaching

Question 15

What does 'MSL' stand for in aviation altimetry?

Accepted Answer

Mean Sea Level

Answer

Maximum Safe Limit

Answer

Minimum Sector Level

Answer

Meteorological Standard Level

Question 16

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 17

What is an 'anabatic wind'?

Accepted Answer

A warm wind blowing upwards along a sun-heated mountain slope during the day

Answer

A cold wind blowing down a mountain at night

Answer

A wind that blows strictly over the ocean

Answer

A violent crosswind on a runway

Question 18

In a high-pressure system (Anticyclone), the air is generally experiencing 'Subsidence'. What does this mean for the weather?

Accepted Answer

The air is slowly sinking and warming, which inhibits cloud formation and generally leads to clear, stable weather

Answer

The air is rising rapidly, creating severe thunderstorms

Answer

The air is moving horizontally at hurricane speeds

Answer

The air is freezing, causing immediate hail

Question 19

Why is a Katabatic wind often much stronger than an Anabatic wind?

Accepted Answer

Because katabatic winds (cold, dense air draining downslope) are assisted by gravity, making them accelerate and often become quite strong

Answer

Because the sun is hotter in the afternoon

Answer

Because they only happen near the equator

Answer

Because they are driven by the Coriolis effect

Question 20

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 21

How does flying a multirotor at a high 'Density Altitude' affect the battery's endurance?

Accepted Answer

The thinner air forces the motors to spin faster to generate the same lift, which draws more current and decreases battery endurance

Answer

It greatly increases the endurance

Answer

It has no effect on the battery

Answer

It causes the battery to freeze

Question 22

What is a 'Rotor Cloud'?

Accepted Answer

A turbulent, rolling cloud found at the lower levels of a mountain wave system, indicating extreme, hazardous turbulence

Answer

A cloud created by the spinning rotors of a heavy drone

Answer

A harmless, flat cloud found over the ocean

Answer

A cloud formed strictly by industrial pollution

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

In a METAR report, what does the wind indication 'VRB03KT' mean?

Accepted Answer

Wind direction is Variable, blowing at a speed of 3 knots

Answer

Very Rough Breezes at 30 knots

Answer

Visibility Reduced Below 3 Kilometers

Answer

Vertical wind blowing down at 3 knots

Question 25

In aviation weather reports, how is a 'Ceiling' defined?

Accepted Answer

The height above the Earth's surface of the lowest layer of clouds reported as 'Broken' (BKN) or 'Overcast' (OVC)

Answer

The maximum altitude a drone can physically reach

Answer

Any cloud layer reported as 'Scattered' (SCT)

Answer

The top of a thunderstorm cloud

Question 26

In a TAF, what does 'PROB30' mean?

Accepted Answer

There is a 30% probability of the forecasted weather phenomena occurring

Answer

The wind speed will definitely be 30 knots

Answer

Visibility will be 30 metres

Answer

The temperature will drop by 30 degrees

Question 27

What atmospheric mechanism typically causes a 'sea breeze' during the daytime?

Accepted Answer

The land heating up faster than the sea, causing air to rise over land and drawing cooler air in from over the water

Answer

The ocean cooling down faster than the land

Answer

The gravitational pull of the moon on the ocean

Answer

High pressure systems stalling over mountain ranges

Question 28

In space weather monitoring, a Kp-index of 1 to 3 indicates:

Accepted Answer

Calm geomagnetic conditions; GPS/GNSS reception should be highly reliable

Answer

A severe solar storm; do not fly

Answer

Heavy rain is imminent

Answer

The drone's compass requires immediate calibration

Question 29

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 30

If you are flying a C2 drone in a city environment under the A2 subcategory, why is the 'Multipath Effect' a significant concern?

Accepted Answer

GNSS/GPS signals bounce off tall buildings, reaching the drone at different times, which can cause erratic position holding, fly-aways, or sudden switches to ATTI mode

Answer

It causes the video feed to display two images

Answer

It drains the remote controller's battery

Answer

It magnifies the noise of the propellers

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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