Exam quiz Meteorology - EASA Drone License A2

Question 1

Under what specific conditions does 'Upslope Fog' form, and why is it a significant hazard for drone pilots in hilly terrain?

Accepted Answer

It forms when moist, stable air is forced up rising terrain by the wind and cools adiabatically; it can persist even with strong winds, unlike radiation fog

Answer

It is caused by the sun heating the surface too quickly, creating a steam-like effect

Answer

It forms only in urban areas due to the high density of buildings and smog

Answer

It is formed by the cooling of the Earth's surface during a completely calm, clear night

Question 2

During which stage of a thunderstorm is the iconic 'anvil' top most likely to form?

Accepted Answer

The Mature stage, when the updraft hits the tropopause and spreads out horizontally

Answer

The Cumulus stage

Answer

The Dissipating stage

Answer

Before the cloud even begins to form

Question 3

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)

Question 4

What is 'LLWS' in an aviation weather forecast?

Accepted Answer

Low-Level Wind Shear; a sudden change in wind speed or direction near the ground, which is extremely hazardous during takeoff and landing

Answer

Light Localized Wind System

Answer

Low-Level Water Saturation

Answer

Lateral Lift Wind Shear

Question 5

In a TAF forecast, what does 'PROB40' indicate?

Accepted Answer

There is a 40% probability of the forecasted weather conditions occurring

Answer

Visibility will be 40 miles

Answer

The temperature will reach 40 °C

Answer

Wind will blow exactly at 40 knots

Question 6

What is a gust front?

Accepted Answer

The leading edge of cool, gusty surface winds originating from a thunderstorm downdraft, often felt before the rain arrives

Answer

The exact centre of a high-pressure system

Answer

The leading edge of a warm front moving over the ocean

Answer

A clear, calm area immediately preceding a fog bank

Question 7

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 8

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 9

On a synoptic weather chart, what do closely spaced isobars indicate?

Accepted Answer

A strong pressure gradient, which results in high wind speeds

Answer

A weak pressure gradient, resulting in calm winds

Answer

An area of heavy snowfall

Answer

A region completely free of turbulence

Question 10

A 'Continental Polar' (cP) air mass is generally characterized by being:

Accepted Answer

Cold and dry

Answer

Warm and moist

Answer

Hot and dry

Answer

Cold and extremely moist

Question 11

What causes 'Steam Fog'?

Accepted Answer

Very cold, dry air moving over much warmer water, causing rapid evapouration and immediate condensation

Answer

Warm air moving over a cold snowpack

Answer

Pollution trapped in a city by an inversion layer

Answer

A sudden drop in barometric pressure

Question 12

What is a 'Thermal Inversion'?

Accepted Answer

A weather condition where a layer of warm air sits over a layer of cooler air near the ground, trapping pollutants and causing hazy, low-visibility conditions

Answer

A situation where the drone flips upside down

Answer

A sudden drop in temperature during a hot day

Answer

The reversal of the Earth's magnetic poles

Question 13

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 14

Which type of cloud is generally associated with steady, continuous, and prolonged precipitation rather than heavy, showery bursts?

Accepted Answer

Nimbostratus

Answer

Cumulonimbus

Answer

Cirrocumulus

Answer

Altocumulus

Question 15

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 16

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 17

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

Question 18

What is the standard temperature lapse rate in the troposphere under ISA conditions?

Accepted Answer

It decreases by approximately 2.0 °C per 1,000 feet (or 6.5 °C per 1,000 metres) of altitude gained

Answer

It increases by 1 °C for every 100 metres of altitude

Answer

It remains completely constant up to 30,000 feet

Answer

It drops by exactly 10 °C per 1,000 feet

Question 19

The visual presence of 'Lenticular Clouds' (lens-shaped clouds) over a mountain range is a strong indicator of:

Accepted Answer

Mountain waves and severe to extreme clear-air turbulence

Answer

A very calm, stable air mass with perfect flying conditions

Answer

An impending drought

Answer

High humidity without any wind

Question 20

What is 'Relative Humidity'?

Accepted Answer

The ratio of the amount of water vapour actually in the air compared to the maximum amount the air could hold at that specific temperature

Answer

The exact weight of water in the air

Answer

The temperature at which water freezes

Answer

The pressure exerted by water droplets on the drone's frame

Question 21

What is a 'Stationary Front'?

Accepted Answer

A boundary between two different air masses where neither is strong enough to replace the other, resulting in very little movement

Answer

A front moving faster than 50 knots

Answer

A thunderstorm that stays in one place

Answer

A solid wall of fog

Question 22

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 23

The passage of a fast-moving cold front is typically marked by which immediate weather changes?

Accepted Answer

A sharp drop in temperature, a sudden shift in wind direction, and a rapid drop followed by a sharp rise in atmospheric pressure

Answer

A gradual warming, clear skies, and a drop in pressure

Answer

No change in wind, but thick fog rolls in

Answer

A sudden increase in humidity without any rain

Question 24

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 25

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 26

Which visible sign strongly suggests the presence of a microburst?

Accepted Answer

A localized ring of blowing dust spreading rapidly outward near the ground, often beneath a thunderstorm or virga

Answer

A perfectly clear, blue sky

Answer

High-altitude cirrus clouds

Answer

A steady, gentle sea breeze

Question 27

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 28

The Beaufort scale is used in meteorology to:

Accepted Answer

Estimate wind speed empirically based on visual observations of its effects on the sea or land (e.g., leaves rustling, branches moving)

Answer

Measure the intensity of an earthquake

Answer

Calculate the exact humidity in the air

Answer

Determine the altitude of the cloud base

Question 29

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 30

Why can a 'katabatic wind' be particularly dangerous for a drone pilot operating in a valley at night or early morning?

Accepted Answer

Because it is a sudden, downslope flow of cold, dense air that can significantly exceed the drone's wind resistance limits without warning

Answer

Because it carries warm air that can overheat the flight controller

Answer

Because it only blows upwards, making it impossible to land

Answer

Because it reverses the polarity of the GPS compass

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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