Meteorology - EASA Drone License A2

Question 1

How does a high density altitude (e.g., a hot, humid day at a high elevation) affect the aerodynamic performance of a multirotor drone?

Accepted Answer

It decreases performance because the air is less dense, meaning the propellers generate less thrust and the motors must work harder

Answer

It increases performance because the warm air provides more lift

Answer

It has no effect on battery-powered drones

Answer

It cools the battery faster, extending flight time

Question 2

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 3

How does ice accumulation directly affect a drone's propellers?

Accepted Answer

It alters the airfoil shape, drastically reducing lift and increasing drag, while uneven ice shedding causes severe, potentially destructive vibrations

Answer

It improves the propeller's aerodynamic efficiency by smoothing scratches

Answer

It keeps the motors cool, allowing for faster flight

Answer

It has no effect unless the ice is more than 5cm thick

Question 4

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 5

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 6

Why is 'Rime Ice' considered highly dangerous to aircraft aerodynamics?

Accepted Answer

It is rough and milky, altering the aerodynamic shape of the airfoil rapidly, destroying lift and increasing drag

Answer

It dissolves the plastic of the drone

Answer

It burns the motors

Answer

It is completely invisible, making it impossible to detect

Question 7

An anemometer is an instrument used to measure:

Accepted Answer

Wind speed

Answer

Atmospheric pressure

Answer

Relative humidity

Answer

The altitude of the cloud base

Question 8

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 9

What happens if you fly from an area of high atmospheric pressure into an area of low pressure without updating your barometric altimeter?

Accepted Answer

The altimeter will read higher than your true altitude, meaning the drone is physically lower to the ground than the pilot thinks (High to Low, look out below)

Answer

The altimeter will read lower than your true altitude

Answer

The drone's motors will automatically shut down

Answer

The drone will experience a sudden loss of radio signal

Question 10

What is 'Buys Ballot's Law' regarding wind and pressure?

Accepted Answer

In the Northern Hemisphere, if you stand with your back to the wind, the area of lower pressure will be to your left

Answer

Wind speed doubles for every 1000 feet of altitude

Answer

Wind always blows directly from South to North

Answer

Hot air is heavier than cold air

Exam questions Meteorology - EASA Drone License A2

EASA Drone License A2: Meteorology 10 Questions no time limit

Exam questions Meteorology - EASA Drone License A2

EASA Drone License A2: Meteorology 10 Questions no time limit

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