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Atmospheric soundings give the following temperature profile .3000 ft ? [ Revision flight ]

Question 138-1 : Fl 150 fl 220 fl 80 fl 180

Admin .greatest icing occurs at temperature between 0°c and 10°c .temperature at fl80 is largely positive at around +4°c there will be no risk of icing .at fl150 temperature is around 8°c severe icing has greatest possibility to occur .temperature above fl160 will be lower than 10°c risk for aircraft icing is possible but with a less intensity than temperature between 0°c and 10°c exemple 238 Fl 150.Fl 150.

Half the mass of the atmosphere is found in the first ?

Question 138-2 : 5 km 11 km 3 km 8 km

The thickness of the troposphere varies with ?

Question 138-3 : Latitude longitude rotation of the earth the wind

Admin .tropopause is the boundary layer between troposphere and stratosphere . 491.16 km is approximately the average thickness of the troposphere over the equator 0° n/s of latitude .at 45° of latitude the thickness is around 12 km .at poles 90° n/s of latitude the thickness is around 8 km .the thickness of the troposphere varies with latitude exemple 246 Latitude.Latitude.

In the lower part of the stratosphere the temperature ?

Question 138-4 : Is almost constant decreases with altitude increases with altitude increases at first and decreases afterward

Admin . 633 .in the real world in the lower part of the stratosphere the temperature is rising a little with altitude but in isa no exemple 250 Is almost constant.Is almost constant.

Which of the following conditions would cause the altimeter to indicate a lower ?

Question 138-5 : Air temperature higher than standard atmospheric pressure lower than standard pressure altitude the same as indicated altitude air temperature lower than standard

Admin .if the temperature or pressure is higher than isa your true altitude will be higher than indicated you are safe if the temperature or pressure is lower than isa your true altitude will be lower than indicated or closer to the ground which is dangerous .if it is cold imagine the air 'shrinking' down so the pressure level will be closer to the ground while if it is hot the air will 'expand' so the pressure level will be higher above the ground .remember the altimeter is reading a pressure level but it does not know how high the pressure level is above the ground if you are flying at 10000 ft indicated you are following the 700 hpa line and although you are keeping the altimeter at 10000 ft you will not always be at 10000 ft above the ground exemple 254 Air temperature higher than standard.Air temperature higher than standard.

The qff at an airfield located 400 metres above sea level is 1016 hpa the air ?

Question 138-6 : Less than 1016 hpa 1016 hpa more than 1016 hpa it is not possible to give a definitive answer

Admin .qff is atmospheric pressure at sea level .qnh is the setting which will give airfield elevation when parked on the airfield .in cold conditions a column of air will shrink so the 'cold' qnh will be less than qff and the 'warm' qnh will be more than qff .this table will help for the exam . 539 exemple 258 Less than 1016 hpa.Less than 1016 hpa.

The qnh at an airfield located 200 metres above sea level is 1009 hpa the air ?

Question 138-7 : More than 1009 hpa 1009 hpa less than 1009 hpa it is not possible to give a definitive answer

Admin .qff is atmospheric pressure at sea level .qnh is the setting which will give airfield elevation when parked on the airfield .in cold conditions a column of air will shrink so the 'cold' qnh will be less than qff and the 'warm' qnh will be more than qff .this table will help for the exam . 539 exemple 262 More than 1009 hpa.More than 1009 hpa.

The qnh at an airfield located 200 metres above sea level is 1022 hpa the air ?

Question 138-8 : It is not possible to give a definitive answer more than 1022 hpa 1022 hpa less than 1022 hpa

Admin .qff is atmospheric pressure at sea level .qnh is the setting which will give airfield elevation when parked on the airfield .in cold conditions a column of air will shrink so the 'cold' qnh will be less than qff and the 'warm' qnh will be more than qff .this table will help for the exam . 539.we need to know the temperature exemple 266 It is not possible to give a definitive answer.It is not possible to give a definitive answer.

The qnh at an airfield located 0 metres above sea level is 1022 hpa the air ?

Question 138-9 : 1022 hpa less than 1022 hpa more than 1022 hpa it is not possible to give a definitive answer

Admin .qff is atmospheric pressure at sea level .qnh is the setting which will give airfield elevation when parked on the airfield .in cold conditions a column of air will shrink so the 'cold' qnh will be less than qff and the 'warm' qnh will be more than qff .this table will help for the exam . 539.when temperature is unknown you are unable to calculate qff expect at mean sea level .at sea level qfe = qnh = qff regardless of temperature because you are not correcting up or down to find msl .pantalejandro .fast and furious analogy .qff = fast furious.from the starting point all 3 race cars 'qfe qnh and qff' are at same position m s l same pressure value as the race goes on qff =>fast furious'  will lead if it is cold colder than isa= more thrust => 'qnh is less' or will lag behind if it is warm warmer than isa = less thrust => 'qnh is more' while the other two cars will go hand by hand .note below m s l the story is reverted > qff less if colder .i made this out hope it works for you guys exemple 270 1022 hpa.1022 hpa.

The qnh at an airfield in california located 69 metres below sea level is 1018 ?

Question 138-10 : More than 1018 hpa 1018 hpa it is not possible to give a definitive answer less than 1018 hpa

Qff is atmospheric pressure at sea level .qnh is the setting which will give airfield elevation when parked on the airfield .in cold conditions a column of air will shrink so the 'cold' qnh will be less than qff and the 'warm' qnh will be more than qff .this table will help for the exam . 539 exemple 274 More than 1018 hpa.More than 1018 hpa.

The qff at an airfield in california located 69 metres below sea level is 1030 ?

Question 138-11 : More than 1030 hpa less than 1030 hpa 1030 hpa it is not possible to give a definitive answer

Admin .qff is atmospheric pressure at sea level .qnh is the setting which will give airfield elevation when parked on the airfield .in cold conditions a column of air will shrink so the 'cold' qnh will be less than qff and the 'warm' qnh will be more than qff .this table will help for the exam . 539 exemple 278 More than 1030 hpaMore than 1030 hpa

If the qfe at locarno 200 metres above sea level is 980 hpa what is the ?

Question 138-12 : 1005 hpa 1000 hpa 1015 hpa 1010 hpa

Admin .the qfe indicates in standard atmosphere the height of the aircraft above the official airport elevation an altimeter set to qfe will therefore read zero when on the ground and you want the qnh to read an altitude .. qfe 980 hpa.|.| 200m / 8m per hpa = 25 hpa.|.| qnh 1005 hpa exemple 282 1005 hpa.1005 hpa.

If the qfe at locarno 200 metres above sea level is 1000 hpa what is the ?

Question 138-13 : 1025 hpa 985 hpa 990 hpa 1035 hpa

Admin .the qfe indicates in standard atmosphere the height of the aircraft above the official airport elevation an altimeter set to qfe will therefore read zero when on the ground and you want the qnh to read an altitude .. qfe 1000 hpa.|.| 200m / 8m per hpa = 25 hpa.|.| qnh 1025 hpa exemple 286 1025 hpa.1025 hpa.

If the qnh at locarno 200 metres above sea level is 1015 hpa what is the ?

Question 138-14 : 990 hpa 995 hpa 1000 hpa 1005 hpa

Admin .the qfe indicates in standard atmosphere the height of the aircraft above the official airport elevation an altimeter set to qfe will therefore read zero when on the ground .qnh is the setting which will give airfield elevation when parked on the airfield .. qfe 990hpa.|.| 200m / 8m per hpa = 25hpa.|.| qnh 1015hpa .use this craftiness .your altimeter is reading 675 ft 200 m when parked on the airfield with a subscale setting of 1015 hpa you want to read 0 ft the qfe you must decrease the subscale setting until the needle shows 0 ft the adjustment knob turns counter clockwise as the needle . 541 exemple 290 990 hpa.990 hpa.

If the qnh at locarno 200 metres above sea level is 1025 hpa what is the ?

Question 138-15 : 1000 hpa 995 hpa 1005 hpa 1025 hpa

Admin .the qfe indicates in standard atmosphere the height of the aircraft above the official airport elevation an altimeter set to qfe will therefore read zero when on the ground .qnh is the setting which will give airfield elevation when parked on the airfield .. qfe 1000hpa.|.| 200m / 8m per hpa = 25hpa.|.| qnh 1025hpa .use this craftiness .your altimeter is reading 675 ft 200 m when parked on the airfield with a subscale setting of 1025 hpa you want to read 0 ft the qfe you must decrease the subscale setting until the needle shows 0 ft the adjustment knob turns counter clockwise as the needle . 541 exemple 294 1000 hpa.1000 hpa.

If you are flying at fl 300 in an air mass that is 15°c warmer than a standard ?

Question 138-16 : 30°c 45°c 60°c 15°c

Admin .in standard atmosphere the decrease in temperature per 1000 feet is 2°c .in standard atmosphere temperature is 15°c at 0 ft .at fl300 temperature is 15°c 30 x 2°c = 45°c .air mass is 15°c warmer than standard . 45°c + 15°c = 30°c exemple 298 -30°c.-30°c.

If you are flying at fl 100 in an air mass that is 10°c warmer than a standard ?

Question 138-17 : +5°c +15°c 10°c 15°c

Admin .in standard atmosphere the decrease in temperature per 1000 feet is 2°c .in standard atmosphere temperature is 15°c at 0 ft .at fl100 temperature is 15°c 10 x 2°c = 5°c .air mass is 10°c warmer than standard . 5°c + 10°c = +5°c exemple 302 +5°c.+5°c.

If you are flying at fl 120 and the outside temperature is 2°c at what ?

Question 138-18 : Fl 110 fl 130 fl 150 fl 90

Admin .in standard atmosphere the decrease in temperature per 1000 feet is 2°c .at fl120 temperature is 2°c .1000 ft below temperature will be 2° warmer .1000 ft above temperature will be 2° colder .the 'freezing level' 0°c will be at fl 110 exemple 306 Fl 110.Fl 110.

An aircraft flying at fl 100 from marseille qnh 1012 hpa to palma de mallorca ?

Question 138-19 : The air at palma de mallorca is warmer than that at marseille the air at palma de mallorca is colder than that at marseille the altimeters are erroneous and need to be tested one of the two qnh values may be incorrect

Admin .case n°1 . 540.if temperature is the same between both locations the true altitude will be reduced over palma by 6 hpa around 162 ft .case n°2 exemple 310 The air at palma de mallorca is warmer than that at marseille.The air at palma de mallorca is warmer than that at marseille.

During a flight over the sea at fl 100 from marseille qnh 1012 hpa to palma de ?

Question 138-20 : None the reason for the change is that the air around palma is warmer than the air around marseille have your altimeter checked because its readings are obviously wrong recheck the qnh because one of the qnh values must be wrong compensate by heading further to the left

exemple 314 None, the reason for the change is that the air around palma is warmer than the air around marseilleNone, the reason for the change is that the air around palma is warmer than the air around marseille

During a flight over the sea at fl 100 from marseille qnh 1016 hpa to palma de ?

Question 138-21 : The air at marseille is warmer than that at palma de mallorca one of the qnh values must be wrong the altimeter is faulty the air at palma de mallorca is warmer than that at marseille

Admin .if the qnh remains unchanged and the true altitude is constantly decreasing the only reason is a reduction of the volume of the 'air mass' how an 'air mass' can contract .the temperature is decreasing and thus the density is increasing .the air at palma de mallorca is colder than that at marseille in other words air at marseille is warmer than that at palma de mallorca exemple 318 The air at marseille is warmer than that at palma de mallorca.The air at marseille is warmer than that at palma de mallorca.

During a flight over the sea at fl 135 the true altitude is 13500 feet local ?

Question 138-22 : It is colder than isa its average temperature is the same as isa it is warmer than isa there is insufficient information to make any assumption

Admin .if you are flying at fl135 your subscale altimeter setting is 1013 hpa .if the local qnh is 1019 hpa and if you set your second altimeter with this value you will normally read more than 13500 ft .but you read today 13500 ft this is your true altitude it means that the air mass is colder than isa air mass is contracted exemple 322 It is colder than isa.It is colder than isa.

An aircraft is flying over the sea at fl 90 the true altitude is 9100 feet ?

Question 138-23 : There is insufficient information to make any assumption it is colder than isa it is warmer than isa its average temperature is the same as isa

Admin .you need to know the local qnh even if we know that the aircraft is flying flight levels 1013 hpa there is insufficient information to make any assumption .true altitude is 9100 ft do not mean that air mass is warmer than isa it could be because the local qnh is higher than 1013 hpa exemple 326 There is insufficient information to make any assumption.There is insufficient information to make any assumption.

An aircraft is flying over the sea at fl 120 with a true altitude of 12000 feet ?

Question 138-24 : Its average temperature is the same as isa it is colder than isa it is warmer than isa there is insufficient information to come to any conclusion

exemple 330 Its average temperature is the same as isa.Its average temperature is the same as isa.

An aircraft is flying over the sea at fl 100 with a true altitude of 10000 feet ?

Question 138-25 : It is warmer than isa its average temperature is about isa it is colder than isa there is insufficient information to come to any conclusion

Admin .if air temperature is isa at fl 100 with a subscale setting of 1013 hpa when turning the subscale knob to the left to set 1003 in the window our indicated altitude will be .1013 1003 = 10 hpa.10 x 27 = 270 ft.10000 270 = 9730 ft.the question states that our true altitude is 10000 ft so to remain at 10000 ft when passing from fl100 1013 hpa to 10000 ft 1003 hpa the air must be warmer than isa .it means that we were at fl100 1013 hpa or 10270 ft 1003 hpa exemple 334 It is warmer than isa.It is warmer than isa.

Which layer of the atmosphere contains more than 90 per cent of all water vapour ?

Question 138-26 : Troposphere lower stratosphere upper stratosphere ozone layer

exemple 338 Troposphere.Troposphere.

The temperature at fl 80 is +6°c what will the temperature be at fl 130 if the ?

Question 138-27 : 4°c 6°c 0°c +2°c

Admin .the temperature lapse rates of the troposphere is mean value 0 65°c/100 m or 2°c/1000 ft .in isa temperature at fl80 should be 15° 2x8 = 1°c .as the current temperature at that level is +6°c you can say that at fl130 it is currently isa+7 .therefore at fl130 15° 2x13 = 11°c +7 from isa+7 = 4°c exemple 342 -4°c.-4°c.

The temperature at fl 110 is 5°c what will the temperature be at fl 50 if the ?

Question 138-28 : +7°c +3°c 3°c 0°c

Admin .in isa temperature at fl110 should be 15° 2x11 = 7°c .as the current temperature at that fl is 5°c you can say that at fl110 it is currently isa+2 .therefore at fl50 15° 2x5 = 5°c +2 from isa+2 = 7°c exemple 346 +7°c.+7°c.

The temperature at fl 160 is 22°c what will the temperature be at fl 90 if the ?

Question 138-29 : 8°c 4°c 0°c +4°c

Admin .the temperature lapse rates of the troposphere is mean value 0 65°c/100 m or 2°c/1000 ft .in isa temperature at fl160 should be 15° 2x16 = 17°c .as the current temperature at that level is 22°c you can say that at fl160 it is currently isa 5 .therefore at fl90 15° 2x9 = 3°c + 5 from isa 5 = 8°c exemple 350 -8°c.-8°c.

A temperature of +15°c is recorded at an altitude of 500 metres above sea ?

Question 138-30 : +2°c +4°c 0°c 2°c

Admin .2°c/1000 ft = 6 5°c/1000 m.from 500 m to 2500 m temperature would drop by 6 5°c x 2 = 13°c .the temperature at the summit of the mountain will be 15°c 13°c = +2°c exemple 354 +2°c.+2°c.

How would you characterise an air temperature of 15°c at the 700 hpa level ?

Question 138-31 : Low high within +/ 5°c of isa 20°c below standard

Admin .there is a few questions in the exam that take information directly from that table below write these down on a sticky and have them on the wall beside you .1013 hpa = msl.850 hpa = fl50. 700 hpa = fl100 .500 hpa = fl180.300 hpa = fl300.200 hpa = fl390.isa temperature at fl100 is normally .15°c 2° x 10 = 5°c .we are 10° below isa the air temperature at this level is lower than standard exemple 358 Low.Low.

An air temperature of 30°c at the 300 hpa level over central europe in summer ?

Question 138-32 : High low very low within +/ 5°c of isa

Admin .300 hpa corresponds at flight level 300 .isa temperature at fl300 is 15º 2º x 30 = 45ºc.outside air temperature is 30°c instead of 45° air temperature is higher than standard temperature exemple 362 High.High.

How would you characterise an air temperature of 55°c at the 200 hpa level ?

Question 138-33 : Within +/ 5°c of isa high low very high

Admin .there is a few questions in the exam that take information directly from that table below write these down on a sticky and have them on the wall beside you .1013 hpa = msl.850 hpa = fl50.700 hpa = fl100.500 hpa = fl180.300 hpa = fl300.200 hpa = fl390..at fl390 200 hpa isa temperature is 15°c 2°c x 39 = 63°c but the lowest temperature in the icao standard atmosphere isa is 56 5°c .thus with an air temperature of 55°c we are within +/ 5°c of isa exemple 366 Within +/-5°c of isa.Within +/-5°c of isa.

What is the technical term for an increase in temperature with altitude ?

Question 138-34 : Inversion subsidence adiabatic advection

exemple 370 Inversion.Inversion.

The station pressure used in surface weather charts is ?

Question 138-35 : Qff qfe qnh qne

Admin .qff is obtained by taking the airfield pressure qfe and reducing it to sea level assuming the actual temperature at the airfield is constant isothermal down to that level this value is used by meteorologists on surface weather charts because it is more likely to accurately reflect actual conditions exemple 374 Qff.Qff.

Which fl corresponds with the 300 hpa pressure level ?

Question 138-36 : Fl 300 fl 50 fl 100 fl 390

Admin .there is a few questions in the exam that take information directly from that table below write these down on a sticky and have them on the wall beside you .1013 hpa = msl.850 hpa = fl50.700 hpa = fl100.500 hpa = fl180.300 hpa = fl300.200 hpa = fl390.any others you can interpolate between these and figure it out .the decrease of 1hpa/27ft is only applicable at the lower levels of the troposphere as you go up and air pressure decreases the change of height per 1 hpa increases at msl 1hpa/27ft at fl180 it's 50ft/hpa and at fl390 it's 105ft/hpa exemple 378 Fl 300Fl 300

Which fl corresponds with the 500 hpa pressure level ?

Question 138-37 : Fl 180 fl 390 fl 100 fl 160

Admin .there is a few questions in the exam that take information directly from that table below write these down on a sticky and have them on the wall beside you .1013 hpa = msl.850 hpa = fl50.700 hpa = fl100.500 hpa = fl180.300 hpa = fl300.200 hpa = fl390.any others you can interpolate between these and figure it out .the decrease of 1hpa/27ft is only applicable at the lower levels of the troposphere as you go up and air pressure decreases the change of height per 1 hpa increases at msl 1hpa/27ft at fl180 it's 50ft/hpa and at fl390 it's 105ft/hpa exemple 382 Fl 180.Fl 180.

Which fl corresponds with the 700 hpa pressure level ?

Question 138-38 : Fl 100 fl 180 fl 300 fl 390

Admin .there is a few questions in the exam that take information directly from that table below write these down on a sticky and have them on the wall beside you .1013 hpa = msl.850 hpa = fl50.700 hpa = fl100.500 hpa = fl180.300 hpa = fl300.200 hpa = fl390.any others you can interpolate between these and figure it out .the decrease of 1hpa/27ft is only applicable at the lower levels of the troposphere as you go up and air pressure decreases the change of height per 1 hpa increases at msl 1hpa/27ft at fl180 it's 50ft/hpa and at fl390 it's 105ft/hpa exemple 386 Fl 100.Fl 100.

Which fl corresponds with the 850 hpa pressure level ?

Question 138-39 : Fl 50 fl100 fl 300 fl 390

Admin .there is a few questions in the exam that take information directly from that table below write these down on a sticky and have them on the wall beside you .1013 hpa = msl.850 hpa = fl50.700 hpa = fl100.500 hpa = fl180.300 hpa = fl300.200 hpa = fl390.any others you can interpolate between these and figure it out .the decrease of 1hpa/27ft is only applicable at the lower levels of the troposphere as you go up and air pressure decreases the change of height per 1 hpa increases at msl 1hpa/27ft at fl180 it's 50ft/hpa and at fl390 it's 105ft/hpa exemple 390 Fl 50.Fl 50.

The qff at an airfield located 400 metres above sea level is 1016 hpa the air ?

Question 138-40 : More than 1016 hpa 1016 hpa less than 1016 hpa it is not possible to give a definitive answer

Admin .qff is atmospheric pressure at sea level .qnh is the setting which will give airfield elevation when parked on the airfield .in cold conditions a column of air will shrink so the 'cold' qnh will be less than qff and the 'warm' qnh will be more than qff .this table will help for the exam . 539 exemple 394 More than 1016 hpa.More than 1016 hpa.

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