1 In cold air, the rate of reduction of the barometric pressure as height AGL increases is:
O higher than in warm air.
O the same as in warm air.
O less than in warm air.
O there is no rule.
2 Throughout the 24 hours the Relative Humidity can be expected to :
O increase during the night and decrease during the day.
O increase during the day and decrease during the night.
O changes only in case of an approaching cold front.
3 Cloud formation can be performed:
O all the rest are true.
O by advection cooling.
O by radiation cooling.
O by adiabatic expansion of the air parcel.
4 In case of mist, visibility:
O is not less than 1000m.
O is less than 1000m.
O is over 5000m.
O is over 10000m.
5 For given distance of the isobars, the wind speed is greater:
O around a High pressure centre.
O in case of parallel isobars.
O around a Low pressure centre.
O has the same speed around High and Low pressure centre.
6 Haze in summer is usually expected:
O at the central area of a High pressure system .
O at the central area of a Low pressure system.
O at a trough axis.
O below a jet stream.
7 Cold Front typical weather is:
O showers and thunderstorms
O rain
O fog
O clear sky
8 Occluded Front typical weather is:
9 Warm Front typical weather is:
O rain.
O fog.
O clear sky.
O showers and thunderstorms.
10 Geostrophic wind is the wind under the influence of the following forces:
O Pressure Gradient and Coriolis Force.
O Pressure Gradient Force.
O Coriolis.
O Friction.
11 Poor visibility is usually the result of:
O stability and very light surface wind.
O steep environmental lapse rate.
O severe low level turbulence.
O instability and strong surface wind.
13 An aircraft is approaching at the airport. At altitude 1000 ft, on final, the wind is from 110° at 40 kt. What is the expected wind at the runway threshold?
O 90?/20 kt
O 130?/20 kt
O 130?/60 kt
O 90?/60 kt
14 Coriolis force:
O is zero at the equator.
O is zero at the poles.
O deflects every moving object to the left in Northern Hemisphere.
O is due to pressure gradient among two areas.
15 Which meteorological message the forecasted ground visibility is mentioned in?
O TAF
O AERODROME WARNING
O SIGMET
O in AERODROME WARNING and SIGMET
16 The associated phenomena with cold fronts are:
O showers-thunderstorms
O rain - drizzle
O rain -showers
O rain - thunderstorms
17 When the wind vector is changing with height there is :
O vertical wind shear
O an inversion.
O horizontal wind shear
O downdraught
18 Which element of a frontal system arrives first at a place towards to it moves?
O the Warm front
O the Warm sector
O the Cold front
O depends on ground temperature
19 Advection fog is possible:
O any time
O two hours after sunrise
O two hours before sunset
O two hours after sunset
21 The term CAVOK in a METAR implies:
O visibility over 10 km and no clouds below 5000 ft.
O clear sky and no turbulence.
O visibility over 5 km and no clouds below 3000 ft.
O clear sky, in general.
22 Which of the following is issued every 9 hours and provides a 12 hours forecast?
O METAR
O VOLMET
23 The following message«FC 201500Z 201601 05005KT 5000 SCT013 OVC028 BECMG 2124 2500BR» implies:
O from 21:00 to 24:00 visibility will become limited to 2500 m, due to mist.
O wind from 50?, 50 kt.
O QNH 28 inHg.
O visibility 5000 ft.
24 Which of the following is issued every half an hour and provides a TREND type forecast:
O SPECI
O ATIS
25 Severe wind shear is associated with:
O thunderstorms and Line Squalls / Squall Lines.
O radiation fog.
O thunderstorms.
O Line Squalls / Squall Lines.
26 In an airport, at night, strong temperature inversion has been noticed. Which weather phenomenon is most likely to take place within the next 5 hours?
O FG
O TS
O RA
O DZ
27 Stratiform clouds are characteristic of:
O a Warm front.
O a Cold front.
O an Occluded front.
O a Cold and an Occluded front.
