Meteorology - EASA Drone Quiz A2

Question 1

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 2

Above the friction layer, the 'geostrophic wind' flows:

Accepted Answer

Parallel to the isobars, balancing the pressure gradient force and the Coriolis force

Answer

Perpendicular to the isobars

Answer

Straight up into the stratosphere

Answer

In a perfect circle around the equator

Question 3

At the end of a METAR report, the code 'NOSIG' implies:

Accepted Answer

No Significant change in the weather conditions is expected in the next 2 hours

Answer

No Signal received from the weather station

Answer

No Significant clouds below 10,000 feet

Answer

Not Safe for IFR Gliding

Question 4

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 5

In a METAR, what does the code 'CB' appended to a cloud group (e.g., SCT030CB) indicate?

Accepted Answer

Cumulonimbus clouds, warning the pilot of potential thunderstorms, severe turbulence, and lightning

Answer

Clear Blue sky

Answer

Cirrocumulus Bands

Answer

Cloud Base

Question 6

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 7

If you leave your drone outside on a cold morning and a thin layer of frost forms on the propellers, what must you do before flying?

Accepted Answer

Thoroughly clean and dry the propellers before flight; even a thin layer of frost disrupts the airfoil's smooth surface, drastically reducing lift and increasing drag

Answer

Fly immediately so the spinning action shakes the frost off

Answer

Turn the motors on full throttle while holding the drone down

Answer

Ignore it; frost is too thin to affect a drone

Question 8

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 9

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 10

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

Quiz Meteorology - EASA Drone Quiz A2

Test 10 Questions EASA Drone Quiz A2 - Meteorology, no time limit