Lernkartei 050 Meteo (Seite 2 von 3)

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What is the approximate SALR at +30°C in warm humid air?

0.9 K / 100 m

0.3 K / 100 m

0.6 K / 100 m

1.0 K / 100 m

What is the approximate SALR at -30°C in cold dry air?

0.3 K / 100 m

0.6 K / 100 m

0.9 K / 100 m

1.5 K / 100 m

In what conditions is the SALR nearly equal to the DALR?

In tropical cumulonimbus clouds

In very cold air, e.g. cirrus clouds (-50°C)

In maritime polar air

In the ITCZ

Which cloud type typically appears as detached, white, fibrous filaments with a silky sheen?

Cirrus (Ci)

Cirrostratus (Cs)

Cirrocumulus (Cc)

Altostratus (As)

Which high cloud type often produces halo phenomena and covers the sky with a transparent veil?

Cirrocumulus (Cc)

Cumulonimbus (Cb)

Cirrostratus (Cs)

Stratus (St)

Which cloud type is made up of small, grain-like elements with no shading and usually covers the sky in a thin sheet?

Cirrostratus (Cs)

Cirrocumulus (Cc)

Altocumulus (Ac)

Cumulus (Cu)

Which of the following characteristics belongs to Cirrostratus clouds?

They produce halo phenomena

They consist of grain-like patches

They appear as towering vertical clouds

They form at low altitudes below 2 km

What are typical characteristics of Altocumulus clouds (Ac)?

Uniform grey sheet, striated or fibrous

White or grey patches, rolls or rounded masses, often shaded

Thin veil producing halos

Vertical clouds with strong updrafts

Which of the following applies to Altostratus clouds (As)?

Greyish or bluish uniform cloud layer, may reveal the Sun vaguely

Rounded cloudlets with elements less than 1° apparent width

Produces halo phenomena frequently

Always thick enough to block the Sun entirely

Which of the following statements best describes Stratocumulus (Sc) clouds?

Layered or patchy grey/whitish clouds with dark parts, often arranged in rounded masses or rolls

Thin fibrous clouds producing halos

Cumuliform towers with cauliflower appearance

Dense cloud sheet completely hiding the Sun

Which statement about Stratus (St) clouds is correct?

Uniform grey layer, possibly causing drizzle or snow grains, with Sun sometimes vaguely visible

Composed of dense, vertically developing towers

Thin and white with halo-producing ice crystals

Only appears above 6,000 meters

Which are typical characteristics of Cumulus (Cu) clouds?

Detached clouds with sharp outlines, often vertically developing with a cauliflower shape

Always fibrous and part of a continuous sheet

Appear only at night and are uniformly dark

Always smooth and produce halo phenomena

Which of the following statements best describes Cumulus congestus (Cu con) / Towering cumulus (TCU)?

Strongly growing cumulus with cauliflower-like tops, capable of producing rain, snow, or snow pellets

Always fibrous and located at high levels

Forms only in stable layers and never produces virga

Flat horizontal layers with no vertical extent

Which of the following characteristics applies to Nimbostratus (Ns) clouds?

Grey, thick clouds producing continuous precipitation reaching the ground

Detached clouds with sharp outlines and cauliflower shape

High-level fibrous clouds with halo phenomena

Clouds with an anvil top producing thunderstorms

What are typical features of a Cumulonimbus (Cb) cloud?

Thin, smooth veil of cloud producing halos

Dense, towering cloud with an anvil top, often producing heavy precipitation

Clouds limited to mid-levels with no vertical extent

Clouds that never merge with lower ragged cloud layers

Welche Beschreibung passt am besten zu Altocumulus lenticularis (Ac len)?

Linsen- oder mandelförmige Wolke mit klaren Umrissen

Cumuliforme Türme, die aus horizontaler Basis aufsteigen

Schichtenförmige, halo-produzierende Eiswolke

Dicht gepackte, grobe Haufenwolken mit vertikalem Aufbau

Was charakterisiert Altocumulus castellanus (Ac cas)?

Türme über gemeinsamer Basis, oft in Linien

Dünne Schleierwolke mit Halo-Erscheinung

Wolken mit horizontalem Aufbau und linsenförmiger Struktur

Vertikal aufsteigende Kumuluswolke mit Anvil-Top

Welche Aussage ist korrekt zu Kondensstreifen (Contrails)?

Sie entstehen nur bei RH > 70%

RH > 60%: Contrails bleiben bestehen oder breiten sich aus

RH < 40%: Contrails sind besonders langlebig

Contrails entstehen bei sehr trockenem Hochdruckwetter

Wie entsteht Stratus fractus (St fra)?

Durch Absinken trockener Luft in Hochdruckgebieten

Als konvektive Reste von Cumulonimbus-Türmen

Durch Verdunstung von Niederschlag unter Cb oder Ns

Als Hochnebel über Eisflächen

Which one of the following local winds is a Foehn wind?

Chinook

Bora

Harmattan

Scirocco

You are flying with an outside air temperature of -12°C and a TAS of 250 kt at FL150 through 8 octas NS. What type and degree of icing is most probable?

In clouds pushed up against the mountains, moderate to severe rime ice

Over flat terrain, away from fronts, moderate to severe rime ice

In clouds pushed up against the mountains, moderate to severe mixed ice

Over flat terrain, moderate hoar frost

What will be the effect on the reading of an altimeter of an aeroplane parked on the ground shortly before an active cold front passes?

Fluctuate up and down by about +/- 50 feet

Be increasing

Remain unchanged

Be decreasing

A winter day in northern Europe with a thick layer of stratocumulus clouds and temperature close to zero degrees C at ground level, you can expect:

Reduced visibility and light icing in clouds

A high probability for icing in clouds. Severe icing in the upper part due to accumulation of large droplets

Decreasing visibility due to snowfall below cloud base, but only light icing in clouds

Turbulence due to a strong inversion, but no icing because clouds consist of ice crystals

Between which latitudes are you most likely to find the region of travelling low pressure systems?

25° - 35°

35° - 55°

55° - 75°

10° - 15°

Where do you encounter the strongest winds close to the ground?

In a cold air mass

When a ridge is present

At a point distant from the center of the occlusion

In the transition zone between air masses

The QNH at an airfield in California located 69 metres below sea level is 1018 hPa. The air temperature is 10°C higher than a standard atmosphere. What is the QFF?

Less than 1018 hPa

It is not possible to give a definitive answer

1018 hPa

More than 1018 hPa

Cumulus clouds are an indication for:

Stability

Up and downdrafts

The approach of a cold front

The approach of a warm front

Over Central Europe what type of cloud cover is typical of the warm sector of a depression during winter?

CI, CS

CU, CB

ST with drizzle

Fair weather CU

Advection fog can be formed when:

Cold moist air flows over a warmer surface

Cold moist air flows over warmer water

Warm moist air flows over a colder surface

Warm moist air flows over a warmer surface

Supercooled droplets are always:

Large and at a temperature below freezing

Small and at a temperature below freezing

At a temperature below freezing

At a temperature below -60°C

A layer in which the temperature decreases with 1°C per 100 m is:

Neutral for dry air

Absolutely unstable

Absolutely stable

Conditionally unstable

A plain in Western Europe with an average height of 500 m (1'600 ft) above sea level is covered with a uniform SC layer of cloud during the summer months. At what height above the ground is the base of this cloud to be expected?

15'000 ft - 25'000 ft above ground

7'000 ft - 15'000 ft above ground

100 ft - 1'500 ft above ground

1'500 ft - 7'000 ft above ground

Hoar frost is most likely to form when:

Flying inside convective clouds

Flying inside stratiform clouds

Flying in supercooled drizzle

Taking off from an airfield with a significant ground inversion

At a weather station at 0600 UTC the air temperature and dew point are respectively: T = -0.5°C, Td = -1.5°C. In the METAR message transmitted by this station, what will the "temperature group" be?

M00/M01

M01/M01

M01/M02

00/M01

In METAR messages, the pressure group represents the...

QNH rounded down to the nearest hPa

QFE rounded down to the nearest hPa

QFE rounded to the nearest hPa

QNH rounded up to the nearest hPa

The geostrophic wind is greater than the gradient wind around a low pressure system because...

Centrifugal force is added to the pressure gradient

Centrifugal force opposes the pressure gradient

Coriolis force is added to the pressure gradient

Coriolis force opposes to the centrifugal force

In general, the meteorological visibility during rainfall compared to during drizzle is...

Greater

The same

Less

In rain - below 1 km, in drizzle - more than 2 km

Refer to TAF: EGGB 2618/2718 28015G25KT 9999 SCT025 TEMPO 2618/2622 29018G35KT 5000 SHRASN BKN010CB PROB30 TEMPO 2618/2621 1500 TSGR BKN008CB BECMG 2621/2624 26010KT. What will the visibility at 2055Z in Birmingham (EGGB) be?

Not less than 1.5 km but could be in excess of 10 km

More than 10 km

A maximum 5 km

A minimum of 1.5 km and a maximum of 5 km

Flight Shannon to London. What is forecasted for the eastern sector of the route between Shannon and London at FL220?

Overcast nimbo layered cumulonimbus

Moderate or severe turbulence and icing

Scattered towering cumulus

Scattered castellanus

A Foehn wind occurs on the:

Leeward side of a mountain range and is caused by the condensation level being lower on the leeward side

Windward side of a mountain range and is caused by surface cooling and reverse air flow

Windward side of a mountain range and is caused by surface heating

Leeward side of a mountain range and is caused by significant moisture loss by precipitation from cloud

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