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ATPL 50 METEOROLOGY |
| 50.04 CLOUDS AND FOG |
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1
Safety is often improved by applying the principles of crm, e.g.: rejected on the base of evidence
Expression of one"s doubts or different opinion for as long as this doubt can not be |
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2
The initial phase of a thunderstorm is characterized by
Continuous updraughts |
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3
In addition to a lifting action, what are two other conditions necessary for thunderstorm formation ?
Unstable conditions and high moisture content |
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4
Which cloud type may indicate the presence of severe turbulence ?
Altocumulus lenticularis |
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5
What weather condition would you expect at a squall line? subject/sec aragraph wording domanda rispostaa rispostab rispostac rispostad ck1 ck2 ck3 ck4
Thunderstorms |
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6
What is the approximate maximum diameter of a microburst ?
4 km |
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7
What weather conditions in the region of the alps would you expect with foehn from south?
Clouds, on the southern sides of passes in the alps |
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8
The bora is a
Cold catabatic wind with the possibility of violent gusts |
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9
Half the mass of the
5 km atmosphere is found in the first |
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10
Which thunderstorms move forward the fastest? subject/sec aragraph wording domanda rispostaa rispostab rispostac rispostad ck1 ck2 ck3 ck4
Frontal thunderstorms. |
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11
Isolated thunderstorms of a local nature are generally caused by
Thermal triggering. |
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12
Which of the following meteorological phenomenon indicates upper level instability which may lead to thunderstorm development ?
Ac castellanus. |
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13
What is the main energy source of a tropical revolving storm?
Latent heat released from condensing water vapour. |
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14
Tropical revolving storms do not occur in temperature. present. wind. winds cross over into the southeast pacific and the south atlantic because subject/sec aragraph wording domanda rispostaa rispostab rispostac rispostad ck1 ck2 ck3 ck4
Of the low water |
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15
Where is the most dangerous zone in a tropical revolving storm? subject/sec aragraph wording domanda rispostaa rispostab rispostac rispostad ck1 ck2 ck3 ck4
In the wall of clouds around the eye. |
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16
During which months is
July until november. the hurricane season in the caribbean? |
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17
How long does a typical
1 to 5 minutes. |
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18
What is a microburst?
A concentrated |
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19
At which altitude, at may hail be expected in connection with a cb?
From the ground up to temperate latitudes, |
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20
At what time of the year are typhoons most likely to occur over the southern islands of japan? subject/sec aragraph wording domanda rispostaa rispostab rispostac rispostad ck1 ck2 ck3 ck4
July to november. |
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21
What is characteristic of the pamperos?
A marked advance of cold air in south america |
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22
Which statement is true for hurricanes in the north atlantic?
From the earth"s frequency of tropopause the core is |
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23
What is the track most likely to be taken by a hurricane in the carribean area?
W est in the earlier stages and later north east |
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24
On a clear summer day, turbulence caused by solar heating is most pronounced
During the early afternoon |
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25
The most hazardous type of cloud that may be encountered on a cross country flight is
Cumulonimbus |
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26
A microburst
Has a diameter up to 4 km |
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27
In which of the following areas is the highest frequency of thunderstorms encountered ?
Tropical |
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28
Which thunderstorms generally develop in the afternoon in summer over land in moderate latitudes?
Airmass thunderstorms |
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29
What are the requirements for the formation of a thunderstorm?
An adequate supply of moisture, conditional instability and a lifting action |
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30
A gustfront is
Formed by the cold air outflow from a thunderstorm |
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31
During the life cycle of a thunderstorm, which stage is characterized predominantly by downdrafts?
Dissipating stage |
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32
What feature is normally associated with the cumulus stage of a thunderstorm?
Roll cloud |
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33
Thunderstorms can occur on a warm front if the
Warm air is moist and the environmental lapse rate exceeds the saturated adiabatic lapse rate |
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34
The diameter and the life time of a typical microburst are in the order of
4 km and 1-5 minutes |
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35
Which of the following statements describes a microburst ? surroundings subject/sec aragraph wording domanda rispostaa rispostab rispostac rispostad ck1 ck2 ck3 ck4
A high speed downburst of air with a generally lower temperature than its |
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36
In which stage of the life cycle of a single thunderstorm cell occur both up- and downdrafts simultaneously?
Mature stage |
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37
At fl 180, the air
Greater than the determined without knowing the qnh. |
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38
Under what condition
At sea level when the temperature is 0° c. |
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39
What is the name of the northerly, cold and strong wind, that sometimes blows over a certain part of europe?
Mistral. |
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40
Aircraft struck by lightning may sometimes get considerable damage and at least temporarily the manoeuvring of the aircraft will be made more difficult. which one of the following statements is correct?
Aircraft made by composite material may get severe damage, the crew may be blinded and temporarily lose the hearing. |
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41
What are the characteristics of the bora ?
It is a cold and very strong wind that blows mainly in winter from a tableland downwards to the adriatic |
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42
What is the name of the hot, local wind, that blows downwards from mountain chains? in the alps, for instance, it may exist both as a southerly or northerly wind depending on the weather situation.
Foehn. |
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43
What degree of likely to be encountered while flying through a cold front in the summer over central europe at fl 100?
Severe turbulence in cloud. |
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44
Which of the following zones is most likely to encounter little or no precipitation?
The north side of the alps with a prevailing foehn from the south. |
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45
Which degree of aircraft turbulence is determined by the following icao description? "there may be moderate changes in aircraft attitude and/or altitude but the aircraft remains in positive control at all times. usually, small variations in air speed. changes in accelerometer readings of 0.5 to 1.0 g at the aircraft"s center of gravity. occupants feel strain against seat belts. loose objects move about. food service and walking are difficult." subject/sec aragraph wording domanda rispostaa rispostab rispostac rispostad ck1 ck2 ck3 ck4
Moderate. |
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46
For an aircraft what are the meteorological dangers associated with a harmattan wind?
Dust and poor visibility. |
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47
What is the strong relatively cold katabatic wind, blowing down the northern adriatic coast, mainly during the winter and spring called?
Bora. |
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48
What are the
High temperatures, |
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49
During which stage of development are rotor winds characterized by roll clouds most likely to occur ?
Mature stage. mature stage. |
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50
Where is a squall line
In front of an active to be expected? |
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51
What are squall lines?
Bands of intensive thunderstorms. |
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52
Which weather
Phenomena are typical for the northern side of the alps with stormy winds from the south (foehn)? |
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53
On which coast of north america, is the danger of tropical revolving storms the greatest?
Se coast |
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54
In central europe when is the greatest likelihood for thunderstorms due to warm updrafts?
Mid - afternoon. |
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55
What is the likely track for a hurricane in the carribean area?
W est in the earlier stages and later turning north east. |
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56
During which seasons are hurricanes most likely to appear in the northern hemisphere?
Summer and autumn. |
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57
Fair weather cumulus often is an indication of
Turbulence at and below the cloud level |
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58
The chinook is a
Warm and dry wind that forms as air descends on the leeward side of the rocky mountains |
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59
The foehn wind is a
Warm fall wind |
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60
What type of clouds, visible even at a long distance, could indicate the presence of a tropical revolving storm?
Dense ci |
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61
A squall line usually is most likely to be encountered
Ahead of a cold front |
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62
A dry, sand- and dust- laden north easterly wind that blows in winter over large parts of north west africa is known as a
Harmattan |
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63
A strong, dry and warm katabatic wind, produced by prior enforced ascent of air over hills or mountains is known as a
Foehn |
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64
Which one of the
Chinook |
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65
When, if at all, is a tropical revolving storm most likely to affect darwin, on the central north coast of australia?
December to april |
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66
(for this question use annex 050-10793a) the arrows labelled "u" represent the tracks of tropical revolving storms which occur mainly from
July to october and are called typhoons |
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67
(for this question use annex 050-10792a) the arrows labelled "t" represents the mean track of tropical revolving storms which occur mainly from
June to october and are called cyclones |
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68
(for this question use annex 050-10791a) the arrows labelled "s" represent the mean tracks of tropical revolving storms which occur mainly from
May to november and are called cyclones |
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69
W hy do tropical revolving storms tend to develop mostly in the western parts of the tropical oceans?
Because there is a maximum of humidity as a result of the trade winds`long sea passage |
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70
(for this question use annex 050-10788a) the arrows labelled "r" represent the mean tracks of tropical revolving storms which occur mainly from
December to april and are called cyclones |
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71
(for this question use annex 050-4725a) considering the route indicates from lisbon to freetown, the harmattan is a
Ne wind affecting north- west africa during november to april reducing visibility in rising dust. |
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72
All pilots encountering clear air turbulence are requested to report it. you experience cat which causes passengers and crew to feel definite strain against their seat belt or shoulders straps. unsecured objects are dislodged. food service and walking are difficult. this intensity of cat should be reported as
Moderate |
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73
The region of the globe where the greatest number of tropical revolving storms occur is
The north-west pacific, affecting japan, formosa, korea and the chinese coastline. |
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74
(for this question use annex 050-4305a) under the weather conditions depicted, which of the following statements is likely to apply?
Thunderstorms may occur in the summer months over central europe. |
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75
A foehn wind occurs on the
Leeward side of a mountain range and is caused by significant moisture loss by precipitation from cloud |
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76
Continuous updraughts during the
Cumulus stage. precipitation is falling. |
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77
Thunderstorms reach their greatest intensity during the
Mature stage. |