28 Which of the following is considered to be a stability factor concerning an air parcel?
O none of the rest.
O cooling from above.
O heating from below.
O increase in the amount of the contained vapour.
29 Which of the following refers to significant weather(for aviation) within the F.I.R. of the issuing office?
O SIGMET
O SPECI
O ATIS
O METAR
30 LGAT 121420Z 35025G35KT 3000 +TSRA BKN010 SCT015CB BKN020TCU 04/Μ01 Q1010 WS LDG RWY15 TEMPO TSRA According to the aforementioned METAR comment as "TRUE" or "FALSE" the following statements: Statement I: "There is 2/8 cloud-coverage from thunderstorm clouds and the average wind speed is 35 kt" . Statement II: "There is a light thunderstorm with rain".
O both are false.
O (I) is true and (II) is false.
O (II) is true and (I) is false.
O both are true.
31 LGAT 121420Z 35025G35KT 3000 +TSRA BKN010 SCT015CB BKN020TCU 04/Μ01 Q1010 WS LDG RWY15 TEMPO TSRA According to the aforementioned METAR comment as "TRUE" or "FALSE" the following statements: Statement I: "The wind is towards 350°" . Statement II: "There is a thunderstorm with heavy rain".
O (I) is true and (II) is false
32 What surface weather is associated with a stationary high pressure area over land in the winter?
O possible fog and low St clouds
O thunderstorms
O continuous rain from Ns and Ac clouds
O snow showers
33 LGAT 121420Z 35025G35KT 3000 +TSRA BKN010 SCT015CB BKN020TCU 04/Μ01 Q1010 WS LDG RWY15 TEMPO TSRA According to the aforementioned METAR comment as "TRUE" or "FALSE" the following statements: Statement I: "There is 5/8-7/8 cloud coverage from towering cumulus and the average wind speed is 25 kt". Statement II: "Dew Point is -1°C".
35 What kind of meteorological message is the following? IN ATHINAI FIR EMBD TS OBS IN WEST PART MOV E-NE INTSF=
O TAF
O GAFOR
36 What kind of meteorological message is the following? FT LGRX 201600Z 210018 VRB05KT 5000 FEW025 SCT030 TEMPO 0206 3000 BECMG 1218 +RA BKN020
37 A strong, dry and warm katabatic wind, produced by prior enforced ascent on the up-wind slope of the hill or mountain is known as:
O Foehn
O Mistral
O Bora
O Scirocco
38 An aircraft flies over terrain where the QNH is 1020 hPa. Given that the indicated altitude is 2000 ft and the altimeter has been set at 1013 hPa, the true altitude is approximately:
O 2210 ft
O 1790 ft
O 2000 ft
O 3020 ft
39 A microburst phenomenon can arise in:
O downdraught under a Cb cloud at the mature stage
O downdraught under a Cb cloud at the growth stage
O updraught under a Cb cloud at the dissipation stage
O updraught under a Cb cloud at the growth stage
40 How are well separated Cb clouds described on the Significant Weather Chart?
O ISOL CB
O FRQ CB
O OCNL CB
O EMBD CB
43 An a/c is approaching from the up-wind side of the range of hills and the pilot observes Ac lenticularis clouds above the top of the range. They imply:
O strong katabatic down-draughts and turbulence after the hills are passed
O turbulence and strong anabatic up-draughts above the tops of the hills
O strong down-draughts immediately before the hills and turbulence
O severe instability above the tops of the hills
46 Severe turbulence in mountain waves is most likely to be encountered:
O a local wind over the eastern shores of Adriatic
O a strong cold N or NW wind which blows into the Gulf of Lions in the NW Mediterranean
O a hot wind blowing northwards from Africa to the Mediterranean
O the name of winds of generally north direction over the Aegean from May to early October
47 In case of Low Level Wind Shear the following is true:
O It may be experienced 15 to 20 miles ahead of a moving thunderstorm cloud
O It is rare where there is an inversion layer at approximately 2000ft
O It is only found under the anvil of a cumulonimbus cloud
O It is very common within a mountain wave
48 In the attached Significant Weather Chart the group of symbols denoted by "Δ" implies:
O mist will be the cause of reduced visibility to 3-5 km
O mist, at the time the Chart is issued, has reduced visibility to 3-5 km
O mist, at the time the Chart is issued, has reduced visibility to 3-5 km close to the surface
O mist, at the time the Chart is issued, has reduced visibility to 3-5 km within the lowest 2000ft
49 The belt of rain ahead of a typical Warm Front is usually reaching:
O 200 miles ahead of the surface position of the front
O 200 miles behind the surface position of the front
O 20 miles behind the surface position of the front
O 800 miles ahead of the surface position of the front
50 Which of the following systems is more likely to produce thunderstorm activity?
O A cold front
O A sea-breeze front
O A ridge of high pressure
O A Foehn wind
51 Mistral is:
52 Unstable air is characterised by:
O Cumuliform clouds and good visibility
O Cb or St clouds, poor visibility and intermittent drizzle
O layered clouds with continuous light rain and moderate visibility
O Ci and Cc clouds causing showers and poor visibility
53 The 'Nimbus' in the designation of a cloud indicates that the cloud:
O is rain bearing
O is a heap cloud consisting of ice crystals
O can cause snow storm
O it will disperse shortly
54 Which of the following clouds is normally associated with drizzle?
O St
O Cb
O Ci and Cs
O All cumuliform clouds
55 Sirocco is:
56 Favourable conditions for the formation of radiation fog are:
O High relative humidity, light wind and clear sky
O High relative humidity, moderate wind and overcast
O Low relative humidity, no wind and overcast
O Low relative humidity, warm air and BKN clouds at least
57 The greatest majority of weather phenomena take place in:
O troposphere
O stratopause
O tropopause
O stratosphere
