The most likely reason for radiation fog to dissipate or become low stratus is :

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

What conditions are most likely to lead to the formation of hill fog? the range

Where, during a flight from Marseille to Dakar, in July, may the ITCZ be encountered?

Which wind systems converge on the ITCZ, when it lies at the equator?

An aircraft is flying in the southern hemisphere at low altitude (less than 2000 feet) and going directly away from a centre of low pressure. What direction, relative to the aircraft, does the wind come from ?

The geostrophic wind is less than the gradient wind around an anticyclone because the

(For this question use annex 050-2422A) Which of the following symbols represents a tropical revolving storm?

(For this question use annex 050-2421A) Which of the following symbols represents a squall line?

Which weather chart icing and the height of the freezing level ? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

An aircraft is approaching a cold front from the warm air mass side at FL 270 and experiencing moderate to severe turbulence. A jet stream is forecast to be at FL 310. The shortest way to get out of this turbulence is by :

When in the upper part of a layer warm air is advected the

If you have to fly through a warm front when freezing level is at 10000 feet in the warm air and at 2000 feet in the cold air, at which altitude is the probability of freezing rain the lowest ?

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 ?

What characterizes a stationary front ?

How are the air masses occlusion ? is behind the behind the occlusion. front of the occlusion. cold air in front of the level. level.

In the lower part of the

In an air mass with no

A layer can be

A zone of strong convection currents is encountered during a flight. In spite of moderate gust you decide to continue the flight. What are your precautionary measures?

What type of clouds are associated with snow showers ?

What the low level wind system between the subtropical high pressure belt and the equatorial trough of low pressure (ITCZ) ?

What type of clouds are associated with rain showers ?

What characteristic is

A frontal depression

What types of cloud will a warm front ? later at some 250 km 300 km NS until the the front NS begin 80 km before the front thickening AS front CB

The diurnal variation in temperature is largest when the sky is

The radiation of the sun heats

Subsidence is :

Advection is :

Frontal depressions can be assumed to move in the direction of the 2000 feet wind subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

(For this question use annex 050- 2539A) The front labelled "Z" is a:

The dry adiabatic lapse rate than in winter night than during the value day

An air mass is called stable when

An inversion is a layer of air which is

Around Paris on January 3rd at 1800 UTC, the surface temperature, under shelter, is 3° C. The sky is covered by 8 oktas of stratus. QNH is 1033 hPa. If the sky is covered all night, the minimum temperature of the night of January 3rd to January 4th should be

On a clear sky, continental ground surface, wind calm, the minimum temperature is reached approximately

From what type of cloud does drizzle fall ?

In which month does the humid monsoon in India start?

What is normally the most effective measure to reduce or avoid CAT effects?

The dry adiabatic lapse rate has a value of

The environmental atmosphere

An inversion is a layer

An isothermal layer is a

During July flights from Bangkok (13° N - 100° E) to Karachi (25° N - 67° E) experience an average tailwind component of 22 kt. In January the same flights, also operating at FL 370, have an average headwind of 50 kt. What is the reason for this difference?

A significant inversion at low height is a characteristic of

An inversion is

From which of the following pieces of information can the stability of the atmosphere be derived?

A super-cooled droplet is one that

Freezing fog consists of

Which of the following is most likely to lead to the dissipation of radiation fog ?

Freezing rain occurs when

Which of the following is true concerning an aircraft that is flying at FL180 in the northern hemisphere, where wind is geostrophic and the true altitude remains constant ?

W hilst flying at FL 180 on the northern hemisphere an aircraft experiences right drift. What effect, if any, will this have on the aircraft"s true altitude ?

Which of the following conditions is most likely to lead to the formation of steam fog (arctic smoke)?

What type of cloud can produce hail showers?

Along the West coast of India the prevailing winds are the

Which of the following statements concerning trade winds is correct?

An isohypse of the 500 hPa pressure surface is labelled with the number 552. This means that for all points on the isohypse the

In still air the temperature decreases at an average of 1.2° C per 100 m increase in altitude. This temperature change is called:

Large hail stones

What information is given on a Significant W eather Chart?

The prevailing surface wind in the area of the west coast of Africa north of the equator (gulf of Guinea) is a subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

An easterly wave is a

Which of the following statements concerning the intertropical convergence zone is true?

The transition from SW to NE monsoon in India occurs in

A blocking anticyclone on the northern hemisphere is

Freezing precipitation occurs

Supercooled droplets can be encountered

Supercooled droplets are always

Supercooled droplets can occur in

Several physical

A layer is conditionally

The temperature at FL 140 is -12° C. What will the temperature be at FL 110 if the ICAO standard lapse rate is applied ?

Which of the following is a common cause of ground or surface temperature inversion ?

At a certain position, the temperature on the 300 hPa chart is -48° C. according to the tropopause chart, the tropopause is at FL 330. What is the most likely temperature at FL 350 ?

Which of the following conditions is most likely to lead to the formation of advection fog ?

The turbulence which occurs at high flight levels (above FL 250) is mainly of the type Clear Air Turbulence. In what way can moderate to severe Clear Air Turbulence affect an aircraft, the flight and the passengers?

A flight is to depart from an airport with runways 09 and 27. Surface wind is 270/05. an inversion is reported at 300 feet with turbulence and wind shear. The wind just above the inversion is 090/30. What is the safest departure procedure ? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

What is the name of the wind or airmass which gives to the main part of India its greatest proportion of precipitation?

Which one of the following statements is correct concerning the movement of the ITCZ in the region of West Africa?

How is the direction and speed of upper winds described in forecasts ?

What cloud cover is typical for a wide warm sector of a polar front depression over Central Europe in the summer ?

How do air masses subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

What is the relative movement of the two airmasses along a cold front ?

Which of the following describes a warm occlusion?

When do cold occlusions occur most frequently in Europe?

In which main direction does a polar front depression move?

(For this question use annex 050-2388A) What change in pressure, will occur at point A, during the next hour? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

How are high level condensation trails formed that are to be found occasionally behind jet aircraft ? flying through relatively warm but humid air

What type of precipitation would you expect at an active unstable cold front?

(For this question use annex 050-2058A) What does the symbol indicate on a significant weather chart?

What positions are connected with contour lines on the weather chart?

In which meteorological forecast chart is information about CAT regions found? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

On which of the

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

If the pressure surfaces bulge upwards in all levels then the pressure system is a

(For this question use annex 050-2060A) Which one of the tracks (dashed lines) is represented by the cross-section shown on the left ?

(For this question use annex 050-2064A) Refer to the diagram. Assuming the usual direction of movement, where will this polar frontal wave have moved ?

The 0° isotherm is forecast to be at FL 50. At what FL would you expect a temperature of -6° C?

Which of the following

What are the surface.

What is the most likely temperature at the tropical tropopause?

In the southern hemisphere what wind effect would you expect when flying from a high pressure area towards a low pressure area at FL 100? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

With what type of clouds are showers most likely associated?

At what time of day, or

What is the average vertical extent of radiation fog?

When does frontal fog, also known as mixing fog, occur?

What wind conditions, occuring just before dawn, favour the formation of fog at an airport where the temperature is 15° C and the dew point is 14° C?

Which of the following weather conditions favour the formation of radiation fog?

The stable layer at some height in the low troposphere of an older high pressure area in the mid-latitudes is called

The range of wind speed in which radiation fog is most likely to form is :

During a cross-country flight at FL 50, you observe the following sequence of clouds: Nimbostratus, Altostratus, Cirrostratus, Cirrus. Which of the following are you most likely to encounter ?

Which one of the following types of cloud is most likely to produce heavy precipitation ? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

What characteristics

Which forces are

How does moderate

What type of fronts are present during the winter in Central Europe when temperatures close to the ground are below 0° C, and freezing rain starts to fall?

In temperate latitudes what weather conditions may be expected over land during the summer in the centre of a stationary high pressure zone ?

At what time of the year, are the paths of north Atlantic lows moving from west to east generally at their most southerly position?

What is the correct

What weather is

What winds are mainly associated with the winter monsoon in the monsoon regions of the Indian sub-continent ? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

What is the most likely cause of a lack of clouds at higher levels in a stationary high?

In which of the following bands of latitude is the intertropical convergence zone most likely to be encountered in January, between Dakar and Rio de Janeiro?

What cloud formation is most likely to occur at low levels when a warm air mass overrides a cold air mass?

The approximate

What type of low associated with a surface front? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

In which approximate direction does the centre of a frontal depression move?

Where is the coldest air to be found, in an occlusion with cold front characteristics?

What type of front / occlusion usually moves the fastest?

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

What weather conditions are prevalent during the summer, over the North Sea, approximately 300 km behind a quickly moving cold front?

What surface weather is associated with a stationary high pressure region over land in the winter?

Which one of the (ITCZ) is correct?

Which of the following changes of state is known as sublimation?

What weather conditions are indications of the summer monsoon in India?

After passing at right angles through a very active cold front in the direction of the cold air, what will you encounter, in the northern hemisphere immediately after a marked change in temperature?

When are the rainy seasons in equatorial Africa?

Which of the following best describes the intertropical convergence zone ?

What is the surface visibility most likely to be, in a warm sector of tropical maritime air, during the summer?

Geostrophic wind is the wind when isobars are

Which of the following are favourable conditions for the formation of freezing rain?

The difference between geostrophic wind and gradient wind is caused by

The geostrophic wind depends on

Divergence in the upper air results, near the surface, in

The wind speed in a system with curved isobars compared to a system with straight isobars is (other conditions being the same)

The wind tends to follow the contour lines (isohypses) above the friction layer because

You are flying from east to west in the northern hemisphere at the 500 hPa pressure surface. Which of the following statements is correct?

In an area of converging air

W ind is caused by

Advection fog can be formed when

In a warm front occlusion

Which of the following circumstances most favour the development of radiation fog?

Which of the following statements is true concerning advection fog?

Steaming fog (arctic sea smoke) occurs in air

The greater the pressure gradient the

The morning following a clear, calm night when the temperature has dropped to the dewpoint, is likely to produce

When the temperature and dew point are less than one degree apart the weather conditions are most likely to be

An observer on the northern hemisphere is under influence of the wind system of a depression, which is moving from West to East. The centre of the depression passes to the South of the observer. For this observer the wind direction is

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

Geostrophic wind

The geostrophic wind speed is directly proportional to the

Frontal fog is most likely to occur subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

When water evaporates

Which constant pressure altitude chart is standard for a 4781 FT pressure level (FL50)?

An outside air temperature of -35° C is measured while cruising at FL 200. What is the temperature deviation from the ISA at this level?

Convective activity over

Absolute instability

The polar front is the boundary between: air. continental polar air.

Steady precipitation, in contrast to showery precipitation falls from

Which of the following is a common result of subsidence ?

Clouds, fog or dew will

Precipitation in the form of showers occurs mainly from

A super-cooled droplet is

The main factor which contributes to the formation of very low clouds ahead of a warm front is the

Areas of sinking air are generally cloudless because as air sinks it

The most effective way to dissipate cloud is by

When isobars, for an area in the mid- latitudes on a weather map, are close together, the wind is most likely to be

The process by which

Which is true of the

In Zurich during a summer day the following weather observations were taken: 160450Z 23015KT 3000 +RA SCT008 SCT020 OVC030 13/12 Q1010 NOSIG = 160650Z 25008KT 6000 SCT040 BKN090 18/14 Q1010 RERA NOSIG = 160850Z 25006KT 8000 SCT040 SCT100 19/15 Q1009 NOSIG = 161050Z 24008KT 9999 SCT040 SCT100 21/15 Q1008 NOSIG = 161250Z 23012KT CAVOK 23/16 Q1005 NOSIG = 161450Z 23016KT 9999 SCT040 BKN090 24/17 Q1003 BECMG 25020G40KT TS = 161650Z 24018G35KT 3000 +TSRA SCT006 BKN015CB 18/16 Q1002 NOSIG = 161850Z 28012KT 9999 SCT030 SCT100 13/11 Q1005 NOSIG = What do you conclude based on these observations? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

(For this question use annex 050-4389A) This chart shows the weather conditions on the ground at 0600 UTC on May 4. Which of the following reports reflects weather development at Geneva Airport?

(For this question use annex 050-10797A) The dotted line designated "Z" represents the

(For this question use annex 050-10798A) The dotted line labelled "Y" represents the

Under anticyclone conditions in the northern hemisphere, with curved isobars the speed of the gradient wind is

For the same pressure gradient at 60° N, 50° N and 40° N the speed of the geostrophic wind will be

For a similar pressure gradient, the geostrophic wind speed will be

The value of the saturated adiabatic lapse rate is closest to that of the dry adiabatic lapse rate in subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

The following NS cloud:

Thunderstorms in exceptional circumstances can occur in a warm front if subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

What is the technical term for an increase in temperature with altitude?

How would you characterise an air temperature of -55° C at the 200 hPa level over western Europe?

How would you characterise an air temperature of -30° C at the 300 hPa level over western Europe?

How would you characterise an air temperature of -15° C at the 700 hPa level over western Europe?

A temperature of +15° C is recorded at an altitude of 500 metres above sea level. If the vertical temperature gradient is that of a standard atmosphere, what will the temperature be at the summit of a mountain, 2500 metres above sea level?

The temperature at FL 160 is -22° C. What will the temperature be at FL 90 if the ICAO standard lapse rate is applied ? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

The temperature at FL 110 is -5° C. What will the temperature be at FL 50 if the ICAO standard lapse rate is applied ?

The temperature at FL 80 is +6° C. What will the temperature be at FL 130 if the ICAO standard lapse rate is applied ?

(For this question use annex 050-10801A) W eather conditions at Bombay during January are mainly influenced by the

(For this question use

(For this question use approach to Dakar during July? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

(For this question use annex 050-4333A) Which of the following best describes Zone A?

When planning a flight at FL 110, which upper wind and temperature chart would be nearest your flight level ? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

When planning a flight at FL 60, which upper wind and temperature chart would be nearest your flight level ?

If you are planning a flight at FL 290, which of these upper wind and temperature charts would be nearest your flight level ?

If you are planning a flight at FL 170, which of these upper wind and temperature charts would be nearest your flight level ?

Which constant pressure altitude chart is standard for a 38662 FT pressure level (FL 390) ?

Which constant pressure altitude chart is standard for a 30065 FT pressure level (FL 300)?

Which constant pressure altitude chart is standard for a 18289 FT pressure level (FL 180) ?

Which constant pressure altitude chart is standard for a 9882 FT pressure level (FL 100) ? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

(For this question use annex 050-4335A) Which of the following best describes Zone C?

(For this question use annex 050-4336A) Which of the following best describes Zone D?

In a polar front depression, an occlusion is called a warm occlusion when the cold air

The intertropical convergence zone (ITCZ) particularly affects

On an aerodrome, when a warm front is approaching

(For this question use annex 050-4334A) Which of the following best describes Zone B?

(For this question use annex 050-4298A) Refer to the diagram. Assuming the usual direction of movement, to which position will the polar frontal wave have moved ? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

(For this question use annex 050-4340A) According to ICAO, which symbol indicates danger to an aircraft in flight?

(For this question use annex 050-4338A) According to ICAO, which symbol indicates a tropical revolving storm?

(For this question use annex 050-4337A) According to ICAO, which symbol indicates severe icing ?

An aircraft flying in the southern hemisphere at 2000 feet, has to turn to the right in order to allow for drift. In which direction, relative to the aircraft, is the centre of low pressure ?

Where are you likely to find the strongest winds close to the ground?

The upper wind and temperature chart of 250 hPa corresponds, in a standard atmosphere, to about subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

(For this question use annex 050-4297A) Examining the pictures, on which one of the tracks (dashed lines) is this cross-section to be expected?

Which of the following is typical for the passage of a cold front in the summer ?

What will be the effect on the reading of an altimeter of an aircraft parked on the ground as an active cold front is passing? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

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

What will be the effect on the reading of an altimeter of an aircraft parked on the ground during the period following the passage of an active cold front ?

Read this description: "After such a fine day, the ring around the moon was a bad sign yesterday evening for the weather today. And, sure enough, it is pouring down outside. The clouds are making an oppressively low ceiling of uniform grey. but at least it has become a little bit warmer." Which of these weather phenomena is being described?

With what type of cloud is "+TSRA" precipitation most commonly associated?

With what type of cloud is heavy precipitation unlikely during the summer months ? subject/sec aragraph wording Domanda rispostaA rispostaB rispostaC rispostaD ck1 ck2 ck3 ck4

Which of the following cloud types is least likely to produce precipitation ?

With what type of cloud is "DZ" precipitation most commonly associated?

With what type of cloud is "GR" precipitation most commonly associated?

With which of the following types of cloud is "+RA" precipitation most commonly associated?

Under which of these conditions is radiation fog most likely to form?

(For this question use annex 050-4339A) According to ICAO, which symbol indicates danger to an aircraft in flight?

Which of the following is most likely to lead to the formation of radiation fog?

The degree of clear air turbulence experiencied by an aircraft is proportional to the

The presence of ice pellets at the surface is evidence that