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Question 156-1 : Which of the following statements is correct ? [ Learning aircraft ]

Normally atmospheric pressure stops falling rapidly behind a warm front the air temperature rises

exemple 256 Normally atmospheric pressure stops falling rapidly behind a warm front, the air temperature rises.

Question 156-2 : Which statement concerning the cold front and warm front of a frontal depression in the northern hemisphere is correct ?

The risk of fog is greater ahead of and behind the warm front than ahead of and behind the cold front

Img622.ahead of and behind the warm front you have stratocumulus with rain and stratus the risk of fog is greater at the warm front exemple 260 The risk of fog is greater ahead of and behind the warm front than ahead of and behind the cold front.

Question 156-3 : Frontal thunderstorms are mainly associated with ?

Cold fronts

Cqb15 july 2011 exemple 264 Cold fronts.

Question 156-4 : An air mass which originates over the north atlantic between 50 and 70 degrees north and is moving in over scandinavia is called ?

Maritime polar air

Cqb15 august 2011 exemple 268 Maritime polar air.

Question 156-5 : Which of the following statements is correct concerning the typical weather in a warm sector in mid and high latitudes over continental areas during summer ?

Generally moderate to good visibility haze sometimes few or scattered cumulus

Cqb15 august 2011 exemple 272 Generally moderate to good visibility, haze, sometimes few or scattered cumulus.

Question 156-6 : The air mass affecting position 's' is most likely to be . 377 ?

Maritime tropical and stable

Admin . 623 exemple 276 Maritime tropical and stable.

Question 156-7 : In a westerly situation the mean time interval between polar frontal waves in western europe is ?

One to two days

exemple 280 One to two days.

Question 156-8 : What change in temperature will occur at point a during the next hour . 380 ?

A drop in temperature

Admin .a cold front is passing over point a . 639.the air behind a cold front is noticeably colder and drier than the air ahead of it exemple 284 A drop in temperature.

Question 156-9 : The air mass type advected from a direction indicated by arrow number 6 is designated . 381 ?

Maritime polar

Img623 exemple 288 Maritime polar.

Question 156-10 : What change in pressure will occur at point f during the next hour . 382 ?

A drop in pressure

Admin .as the warm front approaches the pressure falls during the passage of the warm sector pressure is steady and after the cold front has passed pressure will rise exemple 292 A drop in pressure.

Question 156-11 : During the winter the air mass type advected from a direction indicated by arrow number 1 is designated . 384 ?

Maritime arctic

Ecair16 .what are the difference s between 'maritime polar' and 'maritime arctic' .. 623.polar air masses maritime artic air masses come from the polar cap maritime polar air masses are those which begin their life over cold polar seas exemple 296 Maritime arctic.

Question 156-12 : Which of the following front types is most known for gusty winds ?

Cold front

exemple 300 Cold front.

Question 156-13 : What average geographical latitude is assumed for the zone of the subtropical high ?

30°n

exemple 304 30°n.

Question 156-14 : Which of these statements about air masses are correct or incorrect .1 the polar ice caps are source regions of polar air .2 tropical air may have cold air mass properties ?

1 and 2 are correct

exemple 308 1 and 2 are correct.

Question 156-15 : Which of the following is correct regarding a cold high pressure area ?

It will decrease in intensity with increasing altitude

Easa 2014.a cold high pressure area is one in which the temperatures on the horizontal plane decrease toward the center .the pressure deceases rapidly with height exemple 312 It will decrease in intensity with increasing altitude.

Question 156-16 : What change in temperature will occur at point b during the next hour . 391 ?

Approximately constant temperature

Easa 2014..without a scale we can't tell if the cold front will pass through this position during the next hour but the question statement is during the next hour not 'in one hour' .spacing of isobars at point b and in front of the cold front are the same therefore the temperature at point b should remain constant during the next hour because the pressure will not change .in about one and a half hours we can expect to see a drop in temperature when the cold front will pass above point b exemple 316 Approximately constant temperature.

Question 156-17 : What are the typical weather conditions in a warm anticyclone over land ?

Fine weather dominates in summer

Admin .during summer in the centre of a warm anticyclone over land stationary high pressure zone = flat pressure pattern we have light or no wind . 492.weather is fine but you can get thunderstorms in the afternoon or evening due to convective activity the land warms causing convective lifting = cb exemple 320 Fine weather dominates in summer.

Question 156-18 : For this question use annex 050 061 .the weather most likely to be experienced at position 's' is . . 394 ?

Frequent heavy showers of rain or snow

Ecqb03 july 2016 exemple 324 Frequent heavy showers of rain or snow.

Question 156-19 : Regarding thermodynamic stability and ground visibility what are the difference between a warm air mass and a cold air mass in central europe during summer ?

The cold air mass is unstable and the visibility is better in the warm air mass

Ecqb03 july 2016 exemple 328 The cold air mass is unstable and the visibility is better in the warm air mass.

Question 156-20 : What change in the height of the cloud base will be observed when flying in vmc from the cold air side towards a warm front ?

The cloud base descends gradually

Ecqb03 july 2016 exemple 332 The cloud base descends gradually.

Question 156-21 : What is the average width of the precipitation zone of a cold front ?

50 100 km

Ecqb03 july 2016 exemple 336 50 - 100 km

Question 156-22 : Which part of a frontal system corresponds to the following description .wind nw gusty.clouds cumulus cumulonimbus.precipitation showers occasional thunderstorms.visibility very good apart from precipitation areas ?

Weather behind the cold front

Ecqb03 july 2016 exemple 340 Weather behind the cold front.

Question 156-23 : During summer in the centre of a warm anticyclone over land what are cloudiness and visibility like ?

The sky is clear or with few clouds visibility is moderate to poor

Ecqb03 july 2016 exemple 344 The sky is clear or with few clouds, visibility is moderate to poor.

Question 156-24 : The first clouds are thin wispy cirrus followed by sheets of cirrus and cirrostratus and altostratus the sun is obscured as the altostratus thickens and rain begins to fall the cloud base is lowering as nimbostratus arrives these phenomena describe the approach of a ?

Warm front

Revised ecqb03 july 2016 exemple 348 Warm front.

Question 156-25 : What average geographical latitude is assumed for the zone of the travelling frontal depressions ?

60°n

Ecqb03 august 2016..an area of low pressure found together with a surface front is a 'frontal depression' .frontal depressions are mid latitude weather systems formed due to differences in temperature and pressure of adjacent or converging air masses those frontal depression born on the front between polar and temperate air masses create a warm front where the warmer air rises over the colder one then trail a cold front behind it exemple 352 60°n.

Question 156-26 : Which meteorological system causes a general collapse of the flight levels and makes dangerous the overflight of mountains ?

A cold air pool cold low

exemple 356 A cold air pool (cold low).

Question 156-27 : Which thunderstorms generally develop in the afternoon in summer over land in moderate latitudes ?

Airmass thunderstorms

exemple 360 Airmass thunderstorms.

Question 156-28 : Strong airmass thunderstorms most often occur during summertime in central europe with the arrival of ?

Maritime tropical air

exemple 364 Maritime tropical air.

Question 156-29 : Refer to the chart correct statement is . 412 ?

The front north of frankfurt is moving north east at about 5 kt

exemple 368 The front, north of frankfurt, is moving north-east at about 5 kt.

Question 156-30 : What are the meteorological prerequisites at low level for thunderstorms formed by lifting processes over land ?

High temperatures high humidity

exemple 372 High temperatures, high humidity.

Question 156-31 : The air mass affecting position 'p' is most likely to be . 418 ?

Polar continental

Admin . 623.the wind in northern hemisphere leaves the low pressures on its left from that we deduce a northeasterly wind .hence a continental polar air mass exemple 376 Polar continental.

Question 156-32 : Refer to annex 050 10872a .by the time the front 'z' has passed point 'q' the surface wind will have . 421 ?

Veered and increased

Ecqb04 january 2018 exemple 380 Veered and increased.

Question 156-33 : At what time of the year are the paths of north atlantic lows moving from west to east generally at their most southerly position ?

Winter

Admin .in the winter the north atlantic lows moving from west to east are in their most southerly position having moved from florida to sw england exemple 384 Winter.

Question 156-34 : 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 ?

From the left and slightly on the nose

Admin . 497.the wind in southern hemisphere rotates clockwise around a low at 2000 ft surface friction will cause the wind to veer and blow across the isobars if you go directly away from the centre the wind comes from the left and slightly on the nose exemple 388 From the left and slightly on the nose.

Question 156-35 : Which weather condition lowers true altitude as compared to pressure altitude to a position where flight over mountains could be dangerous ?

Cold low

.when the qnh is lower than 1013 25 hpa altitude is lower than pressure altitude based on the 1013 25 hpa datum .when the ambient temperature is less than isa the aircraft's true altitude is lower than the indicated altitude .the aircraft could be dangerously lower than its pressure altitude flight level in a cold depression exemple 392 Cold low.

Question 156-36 : 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 ?

Wind from the right

Admin .flying from a high pressure area towards a low pressure area at fl100 . 504.wind comes from the right exemple 396 Wind from the right.

Question 156-37 : How do you recognize a cold air pool ?

As a low pressure area aloft e g on the 500 hpa chart

Admin .a cold pool is a meteorologic term for a cold air block .the cold air pool synoptic situation can be identified in the synoptic charts because they show a low pressure area in the 500 hpa chart which is not obvious in the surface chart indicating a concentration of cold air exemple 400 As a low pressure area aloft (e.g. on the 500 hpa chart).

Question 156-38 : What type of air movement is associated with the centre line of a trough ?

Convergence with lifting

Admin .a pressure system in which the isobars around a low pressure become elongated such that the pressure is lower along the axes of the trough than on its two sides sometimes the isobars at a trough have a pronounced v shape active weather fronts always lie in troughs but not all troughs are frontal . 594.the air in the centre of a low pressure centre trough or heat trough is lifted by convergence and widespread ascent as is the air in the intertropical convergence zone exemple 404 Convergence with lifting.

Question 156-39 : What is the correct term for the descending air flow in a large high pressure area ?

Subsidence

exemple 408 Subsidence.

Question 156-40 : What surface weather is associated with a stationary high pressure region over land in the winter ?

A tendency for fog and low st

.high pressure is associated with stable sinking air without convective or frontal lifting there will be little or no cloud and precipitation .any cloud formation in winter will be stratus rather than cumulus and the precipitation will be drizzle or granular snow rather than rain or snow exemple 412 A tendency for fog and low st.


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