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Which of the following is typical for the snow tundra climate ? [ Certification weather ]

Question 147-1 : High pressure weather dominates in winter with the sub soil being frozen travelling depressions during winter time temperatures generally between +5°c and +18°c throughout the whole year high pressure weather dominates in summer

exemple 247 High pressure weather dominates in winter, with the sub-soil being frozen.High pressure weather dominates in winter, with the sub-soil being frozen.

The weather activity within a cold air pool is usually greatest ?

Question 147-2 : In the afternoon early in the morning at noon in the late evening

exemple 251 In the afternoon.In the afternoon.

On which side of an easterly wave are thunderstorms most likely to develop ?

Question 147-3 : On the east side of the wave on the west side of the wave on the north side of the wave on the south side of the wave

Easterly waves are 'long waves' that occur within the trade wind belt start over north western africa and propagate toward the west in the lower tropospheric tradewind flow across the atlantic ocean .approximate location amplitude and wavelength of easterly waves . 495.at first an easterly wave has a small amplitude and produces mild rain showers powerful thunderstorms and the force of high altitude winds amplify the wave when atmospheric conditions are favourable several severe thunderstorms begin to form and eventually a tropical storm may develop . 638.thunderstorms are most likely to develop on the east side of the wave exemple 255 On the east side of the wave.On the east side of the wave.

In january an extended high pressure area is normally observed over ?

Question 147-4 : Siberia southern africa central europe south america

exemple 259 Siberia.Siberia.

How is the mediterranean climate best described ?

Question 147-5 : Anticyclonic and hot in summer frontal depressions in winter cyclonic and chilly in summer frontal depressions in winter depressions due to the polar front affect the weather throughout the whole year anticyclonic and warm the whole year

exemple 263 Anticyclonic and hot in summer, frontal depressions in winter.Anticyclonic and hot in summer, frontal depressions in winter.

Which of the following statements is correct concerning the savannah climate ?

Question 147-6 : There are significant yearly variations in rainfall with a wet and a dry period there are no significant yearly variations in rainfall but there are constant daily variations the annual mean temperature is above 25°c little or no rainfall occurs

exemple 267 There are significant yearly variations in rainfall with a wet and a dry period.There are significant yearly variations in rainfall with a wet and a dry period.

The mean height of the tropical zero degree isotherm is ?

Question 147-7 : 16000 ft 14000 ft 12000 ft 19000 ft

Admin . the zero degree isotherm in the 'polar regions' is at ground level . the zero degree isotherm in 'temperate regions' is at mean sea level in winters and at about 10000 feet in summers . the zero degree isotherm in 'tropics' area 15° 30° n and s of the equator is at about 16000 feet . the zero degree isotherm at the equator is at about 18000 ft fl180 exemple 271 16000 ft.16000 ft.

Which of the following statements concerning the airflow during the summer ?

Question 147-8 : Southwesterly airflow over india northeasterly airflow over india westerly airflow over japan easterly airflow over japan

exemple 275 Southwesterly airflow over india.Southwesterly airflow over india.

What are the typical weather conditions in a cold air pool in summer ?

Question 147-9 : Precipitation is predominant generally fine weather thunderstorms in the afternoon or evening fine weather with thunderstorms in the morning or forenoon ground fog formation is common

exemple 279 Precipitation is predominant.Precipitation is predominant.

The trade winds on the northern hemisphere blow from ?

Question 147-10 : North east north west south west

Ecqb01 2013.. 596. exemple 283 North-east.North-east.

Central europe is situated in the zone of ?

Question 147-11 : Mid latitude climate dry climate subarctic climate snow climate

Ecqb01 2013 exemple 287 Mid-latitude climate.Mid-latitude climate.

Which of the following situations will be typical for the intertropical ?

Question 147-12 : Low pressure and instability hot mainly dry climate high pressure the whole year accompanied by strong prevailing winds high pressure the whole year accompanied by calm winds

Ecqb01 june 2013 exemple 291 Low pressure and instability.Low pressure and instability.

With regard to temperature which of the following is correct for the polar ?

Question 147-13 : The mean temperature of all months is below plus 10°c the mean temperature of all months is above 0°c%2c but temperatures as high as plus 10°c will never be reached the mean temperature of all months is below minus 10°c the mean temperature of the warmest month is 10°c or above and of the coldest month below minus 3°c

Easa 2014..the polar climate regions are characterized by a lack of warm summers every month in a polar climate has an average temperature below 10°c regions with polar climate cover more than 20% of the earth the sun shines for long hours in the summer and for many fewer hours in the winter a polar climate results in treeless tundra glaciers or a permanent or semi permanent layer of ice it has cool summers and very cold winters exemple 295 The mean temperature of all months is below plus 10°c.The mean temperature of all months is below plus 10°c.

What are the typical weather conditions in a westerly situation ?

Question 147-14 : Very changeable steady rainfall fine weather with strong westerly winds frequent thunderstorms during winter

Admin . 596.westerlies average latitude are 50°n and 50°s .a series of fronts or depressions one after the other is referred to as a westerly wave the weather conditions are very changeable exemple 299 Very changeable.Very changeable.

How is an easterly wave identifiable on a surface weather chart ?

Question 147-15 : As a weak trough as a well developed depression as a ridge as a secondary depression

Easa 2014 ..easterly waves are 'long waves' that occur within the trade wind belt start over north western africa and propagate toward the west in the lower tropospheric tradewind flow across the atlantic ocean .approximate location amplitude and wavelength of easterly waves . 495.at first an easterly wave has a small amplitude and produces mild rain showers powerful thunderstorms and the force of high altitude winds amplify the wave when atmospheric conditions are favourable several severe thunderstorms begin to form and eventually a tropical storm may develop . 638.thunderstorms are most likely to develop on the east side of the wave exemple 303 As a weak trough.As a weak trough.

The main icing zone in the itcz is located between ?

Question 147-16 : Fl 160 fl 260 fl 300 fl 400 fl 250 fl 350 fl 50 fl 150

exemple 307 Fl 160 - fl 260.Fl 160 - fl 260.

The mean top of a thunderstorm cluster in the tropics is up to ?

Question 147-17 : 50000 ft 60000 ft 30000 ft 40000 ft

exemple 311 50000 ft.50000 ft.

What is the reason for seasonal changes in climate ?

Question 147-18 : Because the earth's spin axis is inclined to the plane of its orbit round the sun because the earth's orbital speed round the sun varies according to the time of the year because of the difference between the tropical year and the calendar year because the distance between the earth and the sun varies over the year

exemple 315 Because the earth's spin axis is inclined to the plane of its orbit round the sun.Because the earth's spin axis is inclined to the plane of its orbit round the sun.

In the central part of the atlantic ocean between 10°s and 20°s the ?

Question 147-19 : Se trade winds ne monsoon in winter and sw monsoon in summer ne trade winds sw winds throughout the whole year

Admin .take care this question exists with 10°n and 20°n answer is 'ne trade winds' . 584.the question asks for the prevailing winds only between 10°n and 20°n above the atlantic ocean . 2537 exemple 319 Se trade winds.Se trade winds.

The intertropical convergence zone ?

Question 147-20 : Is characterized by different wind directions on both sides of the zone nearly always coincides with the geographical equator is always characterized by cb clouds with high tops forms the boundary between tropical and equatorial air

exemple 323 Is characterized by different wind directions on both sides of the zone.Is characterized by different wind directions on both sides of the zone.

In the indian ocean the name given to the violent tropical storms that can be ?

Question 147-21 : Tropical cyclone typhoon hurricane tornado

Admin .cyclone from greek 'kuklos' means 'circle' is a generic term for all tropical revolving storms according to the geographical location the terminology differs .cylcone in the south western and northern pacific ocean and the south western indian ocean .hurricane as derived from huracàn a taino and carib god or hunraken the mayan storm in the northern atlantic ocean and the north eastern and south western pacific ocean east of 160e .typhoon from chinese t'ai fung located in in the north western pacific ocean . 603 exemple 327 Tropical cyclone.Tropical cyclone.

The average speed of a tropical cyclone is ?

Question 147-22 : Less than 60 kt from 60 kt to 140 kt from 140 kt to 180 kt from 180 kt to 250 kt

exemple 331 Less than 60 kt.Less than 60 kt.

What is the effect of a strong low level inversion ?

Question 147-23 : It promotes vertical wind shear it promotes extensive vertical movement of air it prevents vertical wind shear it results in good visual conditions near the surface

Admin . 646 exemple 335 It promotes vertical wind shear.It promotes vertical wind shear.

You are flying with an outside air temperature of 12°c and a tas of 250 kt at ?

Question 147-24 : In clouds pushed up against the mountains moderate to severe mixed ice in clouds pushed up against the mountains moderate to severe clear ice over flat terrain away from fronts moderate to severe mixed ice over flat terrain moderate hoar frost

Admin .in clouds pushed up against the mountains the lifting action orographic will mean that larger super cooled water droplets are present which will increase the severity of the icing to moderate to severe .at 12°c this is a temperature where there will be some clear ice and some rime ice exemple 339 In clouds pushed up against the mountains, moderate to severe mixed ice.In clouds pushed up against the mountains, moderate to severe mixed ice.

You intend to carry out a vfr flight over the alps on a fine and hot summer day ?

Question 147-25 : Morning mid day afternoon early evening

Admin .the minimum temperature is reached not long after sunrise and on a fine and hot summer day convection currents will increase wind speed and turbulence along the day furthermore in the evening over the alps in summer risks of thunderstorm due to orographic lifting and instability is high .calmest conditions will be in the morning exemple 343 Morning.Morning.

At what time of the year are tornadoes most likely to occur in north america ?

Question 147-26 : Spring summer summer autumn winter autumn winter

Fonsvanheertum .tornadoes in n america are hurricanes no my book says that they appear from june until nov so shouldn't the answer summer autumn be correct . .hurricanes are tropical revolving storms . 493.tornadoes are large funnel cloud with water spouts associated with very large cumulonimbus clouds these cb clouds need maximum convective lifting and this will be there in spring/summer exemple 347 Spring, summer.Spring, summer.

In central europe when is the greatest likelihood for thunderstorms due to warm ?

Question 147-27 : Mid afternoon around midnight early morning late morning

exemple 351 Mid-afternoon.Mid-afternoon.

During which stage of thunderstorm development are rotor winds characterized by ?

Question 147-28 : Mature stage cumulus stage dissipating stage cumulus stage and mature stage

Admin . 494 exemple 355 Mature stage.Mature stage.

Where is a squall line to be expected ?

Question 147-29 : In front of an active cold front behind a cold front in front of a cold front occlusion at higher levels at the surface position of a warm front

Admin .when many individual thunderstorms organize into a nearly continuous line a squall line is born they can be more than 80 nm long and often form 40 to 130 nm ahead of advancing cold fronts racing along squall line thunderstorms blast the ground with torrents of rain and hail driven by winds gusting higher than 50 kt exemple 359 In front of an active cold front.In front of an active cold front.

What are squall lines ?

Question 147-30 : Bands of intensive thunderstorms unusual intensive cold fronts the surface weather associated with upper air troughs the paths of tropical revolving storms

Admin .when many individual thunderstorms organize into a nearly continuous line a squall line is born they can be more than 80 nm long and often form 40 to 130 nm ahead of advancing cold fronts racing along squall line thunderstorms blast the ground with torrents of rain and hail driven by winds gusting higher than 50 kt exemple 363 Bands of intensive thunderstorms.Bands of intensive thunderstorms.

In which of these temperature bands is ice most likely to form on the ?

Question 147-31 : 0°c to 10°c +10°c to 0°c 20°c to 35°c 35°c to 50°c

exemple 367 0°c to -10°c0°c to -10°c

Which of the following statements is true regarding moderate to severe airframe ?

Question 147-32 : It is likely to occur in nimbostratus cloud it will occur in clear sky conditions it may occur in the uppermost levels of a cumulonimbus capillatus formation it always occurs in altostratus cloud

Admin .ns nimbostratus produces heavy rain if the rain falls through a cold air mass below the freezing level moderate to severe airframe icing can occur .in clear air you can only have light airframe icing not moderate or severe on the top of a cumulonimbus temperature is too cold .it will not always occurs in altostratus cloud it dépends on the air mass temperature exemple 371 It is likely to occur in nimbostratus cloud.It is likely to occur in nimbostratus cloud.

Which of the following statements is true regarding moderate to severe airframe ?

Question 147-33 : It will not occur in clear sky conditions it always occurs in altostratus cloud it is unlikely to occur in nimbostratus cloud it will occur in the anvil part of the cumulonimbus cloud

Admin .ns nimbostratus produces heavy rain if the rain falls through a cold air mass below the freezing level moderate to severe airframe icing is likely to occur .it will not always occurs in altostratus cloud it dépends on the air mass temperature .in clear air you can only have light airframe icing not moderate or severe on the top of a cumulonimbus temperature is too cold exemple 375 It will not occur in clear-sky conditions.It will not occur in clear-sky conditions.

Which of the following conditions is most likely to cause airframe icing ?

Question 147-34 : +fzra gr shsn pe

exemple 379 +fzra+fzra

Rime ice forms through the freezing onto aircraft surfaces of ?

Question 147-35 : Small supercooled water drops large supercooled water drops water vapour snow

Admin . clear ice forms on an aircraft by the freezing of large supercooled water drops . rime ice forms through the freezing onto aircraft surfaces of small supercooled water drops exemple 383 Small supercooled water drops.Small supercooled water drops.

How does a pilot react to heavy freezing rain at 2000 ft/agl when he is unable ?

Question 147-36 : He turns back before the aircraft loses manoeuvrability he descends to the warm air layer below he ascends to the cold air layer above he continues to fly at the same altitude

Admin .freezing rain is associated with warm fronts and warm occlusions in a warm front the freezing level is lower than behind in the warm sector and the slope means that freezing rain will be falling on anything underneath .at 2000 ft above ground level descending could be dangerous and you are not sure to reach enough warmer air to deice . 505.remain at the same altitude will give a dangerous build up of ice on the airframe .ascend into cold air means you will not lose the ice and climbing into frontal cloud will give more ice .the best solution is to turn back to get out of this freezing rain quickly exemple 387 He turns back before the aircraft loses manoeuvrability.He turns back before the aircraft loses manoeuvrability.

In which of the following conditions is moderate to severe airframe icing most ?

Question 147-37 : In nimbostratus cloud below the freezing level in clear air in clear air above the freezing level within cloud of any type

Admin .airframe icing will not happen in cirrus cloud composed of ice crystals or if the temperature is above 0ºc ns nimbostratus produces heavy rain if the rain falls through a cold air mass below the freezing level moderate to severe airframe icing can occur .in clear air you can only have light icing exemple 391 In nimbostratus cloud.In nimbostratus cloud.

What flying conditions are normally encountered when flying in cirrus clouds ?

Question 147-38 : Average horizontal visibility more than 1000 m nil icing average horizontal visibility less than 500 m nil icing average horizontal visibility less than 500 m light to moderate icing average horizontal visibility more than 1000 m light to moderate rime ice

exemple 395 Average horizontal visibility more than 1000 m, nil icing.Average horizontal visibility more than 1000 m, nil icing.

How does freezing rain develop ?

Question 147-39 : Rain falls through a layer where temperatures are below 0°c snow falls through a layer where temperatures are above 0°c through melting of snow grains through melting of ice crystals

Admin . 505.freezing rain is encountered ahead of a warm front in winter and in summer and sometimes behind a cold front exemple 399 Rain falls through a layer where temperatures are below 0°c.Rain falls through a layer where temperatures are below 0°c.

What weather conditions in the region of the alps would you expect with foehn ?

Question 147-40 : Clouds on the southern sides of passes in the alps heavy clear air turbulence on the southern side of the alps strong north winds on the southern side of the alps heavy airframe icing conditions on the northern side of the alps

Admin . 520.the southerly wind will give a foehn 'from south' clouds on the southern side exemple 403 Clouds, on the southern sides of passes in the alps.Clouds, on the southern sides of passes in the alps.

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