Lernkartei 050 neu (für PT) (Seite 1 von 1)

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8/8 stratus base 200 ft/AGL is observed at sunrise at an aerodrome in the north of France; the QNH is 1028 hPa and there is a variable wind of 3 kt. What change in these clouds is likely at 12:00 UTC in summer and winter?

Winter: BKN base 2’500 ft/AGL; summer BKN base 3’500 ft/AGL

Winter: clear sky; summer BKN CB base 1’500 ft/AGL

Winter: OVC base 500 ft/AGL; summer SCT base 3’000 ft/AGL

Winter: SCT base 3’000 ft/AGL; summer OVC base 500 ft/AGL

A cold air drop

Is usually most evident in the circulation and temperature fields of the middle troposphere and may show little or no sign on a surface chart

Develops usually in winter when very unstable maritime polar or maritime arctic air currents stream southwards along the eastern side of an extensive ridge of high pressure, in association with occluded systems

Occurs frequently in winter to the south of the Alps when this region is under the influence of cold north-westerly airstream

Normally disappears at night and occurs almost exclusively in summer

A Foehn wind occurs on the...

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

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

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

A gustfront is...

Characterized by heavy lightning

Another name for a cold front

Formed by the cold air outflow from a thunderstorm

Normally encountered directly below a thunderstorm

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

Frontal waves normally form on...

slow moving cold fronts and stationary fronts

slow moving warm fronts and occluding fronts

warm fronts

rapidly moving cold fronts or warm fronts

How are well separated CB clouds described on the Significant Weather Chart?

ISOL CB

FREQ CB

OCNL CB

EMBD CB

How may the correct wind speed be found, for a level which is between two upper air chart levels?

By reading wind direction and speed from the next higher chart

By interpolation of the wind information available from the two charts, while also considering the maximum wind information found on the Significant Weather Chart

By simple interpolation of wind information available from the two charts

By reading wind direction and speed from the 300 hPa chart

If a saturated air mass descends down a slope its temperature increases at:

A higher rate than in dry air, as it gives up latent evaporation heat

A lower rate than in dry air, as condensation gives out heat

The same rate as if the air mass were dry

A lower rate than in dry air, as evaporation absorbs heat

If you are flying from Zurich to London at FL 220, what conditions can you expect at cruising altitude?

Prolonged severe turbulence and icing throughout the flight

CAT for the first half of the flight

Scattered thunderstorms

Flight largely in cloud; no turbulence

In a low pressure system the convergence at the surface is caused by...

centripetal forces

frictional forces

the imbalance of the horizontal gradient force and the Coriolis force

the curvature of the isobars

In the lower layers of the atmosphere, due to friction, the wind changes direction towards the low pressure area because:

Wind speed decreases and therefore Coriolis force decreases

Turbulence is formed and pressure decreases

The pressure gradient increases

Turbulence is formed and pressure increases

In what hPa range is an upper weather chart for FL 340 situated?

400 - 300 hPa

500 - 400 hPa

600 - 500 hPa

300 - 200 hPa

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

CI, CS

ST with drizzle

Fair weather CU

CU, CB

The DALR is greater than the SALR because...

None is correct

saturated vapour pressure increases with increasing temperature

the rate of cooling of saturated air is reduced by the release of latent heat of condensation

of the release of latent heat of evaporation

The diameter of a typical tornado is...

About 2 to 6 km

In the order of 10 km

Only a few metres

100 to 150 metres

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

Centrifugal force is added to the pressure gradient

Coriolis force opposes to the centrifugal force

Coriolis force is added to the pressure gradient

Centrifugal force opposes the pressure gradient

The positions that are connected by isobars on the surface weather chart, are positions with the same...

air pressure at a given level

temperature at a given level

wind velocity at a given level

relative pressure heights

The weather is clear and the temperature decreases rapidly as you climb (≈3°C/1000 ft). What does that indicate?

Unstable air

Sublimation

Stable air

Saturation

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

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?

be increasing

fluctuate up and down by about +/- 50 feet

remain unchanged

be decreasing

When do cold occlusions occur most frequently in Europe?

Winter

Summer

Autumn and winter

Winter and spring

Which of the following statements is an interpretation of the METAR 00000KT 0200 R14/0800U R16/P1500U FZFG VV001 M03/M03 Q1022 BECMG 8000?

RVR for runway 14 800 metres, vertical visibility 100 ft, calm, meteorological visibility improving to 8000 metres in the next 2 hours

Meteorological visibility 200 ft, RVR for runway 16 more than 1500 metres, vertical visibility 100 ft, fog with hoar frost

Meteorological visibility for runway 14 800 metres, fog with hoar frost, RVR for runway 16 more than 1500 metres

Meteorological visibility 200 metres, RVR for runway 16 1500 metres, temperature -3°C, vertical visibility 100 metres

Which type of fog is likely to form when air having temperature of 15 °C and dew point of 12 °C blows at 10 knots over a sea surface having temperatures of 5 °C?

Radiation fog

Advection fog

Steam fog

Frontal fog

You are flying with an outside air temperature of -12°C and a TAS of 250 kt at FL150 through 8 oktas 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, moderate hoar frost

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

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

You have to make an emergency landing on water (MSL). From a neighbouring airfield (elevation 2000 ft) you receive a meteorological report: QNH = 1030 hPa, temperature = 25°C. What QNH-altitude is indicated after landing?

0 ft

less than 0 ft

more than 0 ft

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