Exam quiz Meteorology - EASA Drone License A2

Question 1

The 'Dew Point' is defined as:

Accepted Answer

The temperature to which air must be cooled (at constant pressure) for it to become 100% saturated with water vapour, leading to condensation

Answer

The time of day when dew evapourates

Answer

The altitude where clouds freeze

Answer

The speed at which rain falls

Question 2

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 3

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 4

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 5

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 6

How does 'Frontal Fog' typically form?

Accepted Answer

When warm rain falls through a layer of colder air near the ground, evapourating and raising the humidity of the cold air to saturation

Answer

By the sudden cooling of the ground on a clear night

Answer

By wind blowing humid air up a mountain slope

Answer

By industrial pollution mixing with snow

Question 7

On the Beaufort scale, a Force 5 wind (Fresh Breeze, roughly 17-21 knots) is generally characterized on land by:

Accepted Answer

Small trees in leaf beginning to sway; crested wavelets forming on inland waters. This is often the operational limit for many commercial drones.

Answer

Smoke rising vertically

Answer

Trees being uprooted and structural damage occurring

Answer

Only leaves rustling gently

Question 8

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 9

A 'Maritime Tropical' (mT) air mass is generally characterized by being:

Accepted Answer

Warm and moist, often bringing unstable weather and thunderstorms when forced to rise

Answer

Cold and dry

Answer

Hot and very dry

Answer

Freezing cold and wet

Question 10

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 11

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 12

If you are flying in a valley during a sunny morning, how are the local winds likely moving?

Accepted Answer

Up the slopes (anabatic winds), as the sun heats the mountain sides faster than the valley floor

Answer

Down the slopes into the valley

Answer

In a perfect circle

Answer

They remain completely stagnant

Question 13

How does a 'Squall' differ from a normal 'Wind Gust'?

Accepted Answer

A gust is a very brief spike in wind speed (seconds); a squall is a sudden, sharp increase in wind speed that lasts much longer (several minutes) and is usually associated with active storms

Answer

A squall is a decrease in wind speed

Answer

A squall only happens over the ocean

Answer

There is no difference

Question 14

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 15

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 16

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 17

On a weather map, what are 'Isobars'?

Accepted Answer

Lines connecting points of equal atmospheric pressure

Answer

Lines connecting points of equal temperature

Answer

Lines indicating the boundaries of controlled airspace

Answer

Lines tracking the path of a hurricane

Question 18

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 19

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 20

What is the primary danger of a microburst to a UAS during flight?

Accepted Answer

It creates a massive, localized downdraft followed by violent horizontal wind shear that can easily overpower the drone's propulsion and force it into the ground

Answer

It causes the drone's battery to freeze

Answer

It permanently magnetizes the drone's compass

Answer

It generates a thermal updraft that pushes the drone above the 120 m limit

Question 21

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 22

In a METAR report, what does the code 'HZ' stand for?

Accepted Answer

Haze (fine dust or salt particles suspended in the air, reducing visibility)

Answer

Hail Zone

Answer

Heavy Zonal winds

Answer

Hurricane Zone

Question 23

What does the altimeter setting 'QNE' refer to in aviation?

Accepted Answer

The standard pressure setting of 1013.25 hPa, used to fly at standardized Flight Levels (FL) regardless of local weather

Answer

The local atmospheric pressure at the airfield

Answer

The pressure reduced to mean sea level

Answer

The altitude of the drone above the ground

Question 24

When checking space weather, what does a Kp-index of 0 to 1 indicate?

Accepted Answer

Extremely calm space weather conditions; optimal for reliable GNSS/GPS reception and compass accuracy

Answer

A severe geomagnetic storm; flying is not recommended

Answer

Total loss of GNSS satellites

Answer

A hurricane is approaching

Question 25

As the temperature of an air mass increases, its capacity to hold invisible water vapour:

Accepted Answer

Increases significantly

Answer

Decreases significantly

Answer

Remains exactly the same

Answer

Causes the air mass to immediately turn into snow

Question 26

How is 'Density Altitude' best defined in aviation?

Accepted Answer

Pressure altitude corrected for non-standard temperature; it is the altitude the drone 'feels' like it is flying at

Answer

The physical altitude measured by a laser rangefinder

Answer

The altitude of the lowest cloud layer

Answer

The height above the terrain directly below the drone

Question 27

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 28

A 'katabatic wind' is best described as:

Accepted Answer

A dense, cold wind flowing down a mountain slope or glacier into a valley, typically at night

Answer

A warm wind blowing up a mountain slope during the day

Answer

A horizontal wind caused by the Coriolis effect

Answer

A sudden updraft inside a thunderstorm

Question 29

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 30

What is 'QNH' in altimetry?

Accepted Answer

The local atmospheric pressure reduced to mean sea level; setting this on an altimeter makes it read altitude above sea level (AMSL)

Answer

The atmospheric pressure measured at the exact altitude of the drone

Answer

The standard pressure of 1013.25 hPa

Answer

The altitude above ground level (AGL)

Exam simulation Meteorology - EASA Drone License A2

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