Exam quiz Meteorology - EASA Drone License A2

Question 1

In a METAR report, what does the code '-RA' indicate?

Accepted Answer

Light Rain

Answer

Heavy Rain

Answer

No Rain

Answer

Freezing Rain

Question 2

What is a 'Gust' in wind terminology?

Accepted Answer

A sudden, brief increase in the speed of the wind, usually lasting less than 20 seconds

Answer

A steady breeze lasting more than an hour

Answer

A wind that blows strictly from the north

Answer

A wind that brings snow

Question 3

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 4

What is the danger of flying a drone in an area with a high 'Kp-index' (e.g., Kp 7 or 8)?

Accepted Answer

Severe geomagnetic storms can disrupt the ionosphere, causing significant GPS positioning errors, compass malfunctions, or total loss of satellite lock

Answer

The drone's battery will drain twice as fast

Answer

It means there is a high probability of a tornado

Answer

The remote controller will overheat

Question 5

What is the difference between a 'Land Breeze' and a 'Sea Breeze'?

Accepted Answer

A sea breeze blows from the water to the land during the day; a land breeze blows from the land to the water at night

Answer

A land breeze brings rain, a sea breeze brings clear skies

Answer

A sea breeze is caused by the moon, a land breeze by the sun

Answer

There is no difference; they both flow in the same direction

Question 6

In meteorology and space weather planning, why is a high 'K-index' (Kp 5 or higher) a significant concern for the automated flight modes of a drone?

Accepted Answer

It signals a geomagnetic storm that can cause severe GPS positioning drift or sudden loss of satellite lock

Answer

It indicates a high probability of heavy snowfall

Answer

It means the air density is too high for efficient propeller rotation

Answer

It signifies that the wind speed at 120 m is exactly 50 knots

Question 7

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 8

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 9

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 10

In aviation meteorology, what does 'SIGMET' stand for?

Accepted Answer

Significant Meteorological Information; an advisory concerning potentially hazardous weather phenomena like severe turbulence, icing, or volcanic ash

Answer

Signal Meteorological Tool

Answer

Significant Moisture Evaluation Testing

Answer

Standard Instrument Ground Meteorological Evaluation

Question 11

During the 'Dissipating Stage' of a thunderstorm, what air movement dominates?

Accepted Answer

Downdrafts, as the rain cools the air and cuts off the storm's supply of warm, moist updrafts

Answer

Strong updrafts

Answer

Horizontal winds only

Answer

A perfect vacuum

Question 12

A 'Warm Front' typically brings what kind of weather as it approaches?

Accepted Answer

A gradual lowering and thickening of the cloud ceiling (cirrus to stratus to nimbostratus) accompanied by steady, prolonged precipitation

Answer

Violent, short-lived thunderstorms

Answer

A sudden drop in temperature and clear skies

Answer

High-speed, turbulent downdrafts

Question 13

If a METAR reports the sky condition as 'BKN' (Broken), what is the cloud coverage?

Accepted Answer

5 to 7 oktas (eighths); this constitutes a 'ceiling' in aviation

Answer

1 to 2 oktas (eighths)

Answer

8 oktas (fully overcast)

Answer

Only high-altitude cirrus clouds

Question 14

In the lower troposphere, standard atmospheric pressure decreases by approximately 1 hPa for every:

Accepted Answer

27 to 30 feet (approx. 8 metres) of altitude gained

Answer

10 feet of altitude gained

Answer

100 feet of altitude gained

Answer

1,000 feet of altitude gained

Question 15

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 16

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 17

In aviation meteorology, 'Wind Shear' is defined as:

Accepted Answer

A sudden, drastic change in wind speed and/or direction over a very short vertical or horizontal distance

Answer

A gradual change in wind direction over several days

Answer

The friction caused by wind hitting the drone's propellers

Answer

A constant, steady breeze from the ocean

Question 18

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 19

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 20

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 21

In the Northern Hemisphere, how does the wind flow around a low-pressure system at the surface?

Accepted Answer

Counter-clockwise and spiraling inward

Answer

Clockwise and spiraling outward

Answer

Directly downwards into the centre

Answer

It remains perfectly calm

Question 22

In a METAR report, what does the weather code 'SN' indicate?

Accepted Answer

Snow

Answer

Sandstorm

Answer

Squall line

Answer

Smoke

Question 23

If you read a TAF and see the code 'WS015/25045KT', what does 'WS' stand for?

Accepted Answer

Wind Shear (in this case, at 1,500 feet, wind is from 250 degrees at 45 knots)

Answer

Weather Station

Answer

Winter Snow

Answer

Warm Sector

Question 24

What happens during 'Orographic Lift'?

Accepted Answer

A moving air mass is forced to rise upwards by a physical barrier, such as a mountain range, causing it to cool, condense, and often form clouds and precipitation on the windward side

Answer

An aircraft takes off using the wind to gain altitude

Answer

Hot air rises from a freshly paved road

Answer

Cold air sinks down into a valley at night

Question 25

What is a 'Squall Line'?

Accepted Answer

A narrow band of high winds and severe thunderstorms, often forming just ahead of a fast-moving cold front

Answer

The line marking the boundary of a restricted airspace

Answer

A line of calm weather directly behind a warm front

Answer

The path a drone takes when performing an automatic grid survey

Question 26

When assessing ground risk, what is the 'Buffer Zone'?

Accepted Answer

An empty area on the ground around the operational volume intended to protect uninvolved people in case the drone falls or drifts outside the planned flight path

Answer

A foam bumper placed around the drone

Answer

The padding inside the drone's carrying case

Answer

The time added to the schedule for delays

Question 27

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

Question 28

Which of the following indicates an UNSTABLE air mass?

Accepted Answer

Towering cumuliform clouds, showery precipitation, good visibility, and turbulent air

Answer

Continuous, steady rain and stratus clouds

Answer

Poor visibility due to trapped smoke and haze

Answer

A strong temperature inversion near the ground

Question 29

What is the difference between an anemometer and a wind vane?

Accepted Answer

An anemometer measures wind speed, while a wind vane indicates wind direction

Answer

An anemometer measures direction, a wind vane measures speed

Answer

They are exactly the same instrument

Answer

An anemometer measures humidity, a wind vane measures pressure

Question 30

Why does a multirotor drone typically have significantly shorter flight times at very high altitudes (e.g., 3,000 m in the mountains)?

Accepted Answer

Because the air density is much lower, requiring the motors to spin much faster and consume more power to generate the same amount of aerodynamic lift

Answer

Because the GPS signal is too strong and overloads the processor

Answer

Because the air is too thick for the propellers to spin efficiently

Answer

Because the Earth's gravity is stronger at high altitudes

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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