An aircraft lands at an airport airport elevation 540 ft QNH 993 hPa with the altimeter set to 1013 hPa What will it indicate ?
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After landing at an aerodrome QNH 993 hPa it is noticed that the altimeter is still set to 1013 2 hPa and that it reads 1200 feet What is the elevation of the aerodrome above mean sea level ?
Select from the map the average temperature for the route Zurich Rome at FL 110 303 ?
Select from map average temperature the route athens geneva at fl 150 304 average temperature the route athens to geneva around 20°c ((16+18+25)/3) at fl 180 assuming a typical lapse rate of 2°c/1000ft at fl 150 it will be 6°c warmer 20°c + 6°c = 14°c. 
What the deviation of temperature at fl 140 above copenhagen compared to isa 304 8°c colder than isa. at fl180 above copenhagen temperature 29°c at fl180 in a standard atmosphere temperature is 15° (2° x 18)) = 21°c as current temperature at that level 29°c you can say that at fl180 it currently isa 8°c without other informations fl140 we can only assume that same temperature deviation occurs at fl140. 
Select from map average temperature the route zurich lisboa at fl 200 305 8°c colder than isa. the chart for fl240! 36 + 38 + 42 + 43 + 42 + 43 + 43 = 287 287/7 = 41°c +2°/1000 ft in standard atmopshere when descending fl240 ==> fl200 4000 ft ==> +8°c 41 + 8° = 33°c. 
Select from map average temperature the route geneva stockholm at fl260 306 8°c colder than isa. this chart given fl300 at fl260 between geneva stockholm average temperature is (52 + 54 + 57 + 57 + 56 + 56)/6 = around 55°c average temperature at fl260 8° warmer (2° per 1000 ft) = 55°c + 8°c = 47°c. Question 123-8
Looking at chart at what altitude above frankfurt would you expect tropopause to be located 308 8°c colder than isa. frankfurt close to 350 boxe answer fl360 the best. Question 123-9
If you are flying from zurich to shannon at fl 340 where will your cruising altitude be 311 Constantly in stratosphere. all boxes on chart indicate a level below fl340 on zurich to shannon route. Question 123-10
The troposphere the Part of atmosphere below tropopause. . Question 123-11
The tropopause a level at which Temperature ceases to fall with increasing height. the layer from 12 km to 25 km above tropopause absolutely stable temperature does not vary with height it an isothermal layer where we have absolute stability. Question 123-12
The tropopause lower Over north pole than over equator. . Question 123-13
The temperature at 10000 ft in icao standard atmosphere Over north pole than over equator. in standard atmosphere decrease in temperature per 1000 feet 2°c the icao standard atmosphere (isa) states 'at msl temperature 15°c pressure 1013 25 hpa' at 10000 ft temperature is 15°c (2°c x 10) = 5°c. Question 123-14
What of following the most important constituent in atmosphere from a weather stand point Over north pole than over equator. in standard atmosphere decrease in temperature per 1000 feet 2°c the icao standard atmosphere (isa) states 'at msl temperature 15°c pressure 1013 25 hpa' at 10000 ft temperature is 15°c (2°c x 10) = 5°c. Question 123-15
The average height of tropopause at 50°n about Over north pole than over equator. . Question 123-16
The height and temperature of tropopause are respectively in order of 6 km 75°c over equator. height of tropopause polar tropopause (8km) 45°c tropicale tropopause (15 km) 75°c equatorial tropopause (16 km) 80°c we can say this question that temperature over equator in order of 75°c/ 80°c. Question 123-17
In icao standard atmosphere decrease in temperature with height below 11 km 6 km 75°c over equator. 2°c/1000 ft. Question 123-18
Which statement correct regarding icao standard atmosphere At msl temperature 5°c pressure 3 25hpa. 2°c/1000 ft. Question 123-19
Qnh defined as Qfe reduced to msl using values of standard atmosphere. qnh doesn't give you msl (mean sea level) zero height just pressure reading at which your altimeter will read zero in cold air this will be above msl in warm air below msl at isa temperatures qnh pressure level will be at msl but will not necessarily be 1013 hpa. Question 123-20
Which of following statements true Qnh can be equal to qfe. qnh doesn't give you msl (mean sea level) zero height just pressure reading at which your altimeter will read zero in cold air this will be above msl in warm air below msl at isa temperatures qnh pressure level will be at msl but will not necessarily be 1013 hpa. Question 123-21
Which statement true Qnh can be lower as well as higher than 3 25 hpa. qnh doesn't give you msl (mean sea level) zero height just pressure reading at which your altimeter will read zero in cold air this will be above msl in warm air below msl at isa temperatures qnh pressure level will be at msl but will not necessarily be 1013 hpa. Question 123-22
When subscale set to qnh of an airfield pressure altimeter indicates Elevation while landing. regardless of atmospheric conditions altimeter will indicate field elevation at touchdown with qnh set because qnh the qfe reduced to sea level using isa conditions the altimeter calibrated to isa conditions. Question 123-23
The radiation of s heats The surface of earth which heats air in troposphere. regardless of atmospheric conditions altimeter will indicate field elevation at touchdown with qnh set because qnh the qfe reduced to sea level using isa conditions the altimeter calibrated to isa conditions. Question 123-24
The vertical extent of friction layer depends primarily on Stability wind speed roughness of surface. the height of friction layer can vary depending on type of terrain wind speed it depends also on vertical temperature profile if air stable (environmental lapse rate less than 1 8°c/1000 ft) any air moved up turbulence will want to sink back to its original level in atmosphere there will be a relatively shallow friction layer if air unstable (elr more than 3°c/1000 ft) then any movement up will continue up increasing depth of friction layer. Question 123-25
The following temperatures have been observed over a station at 1200 utc station at mean sea level 20000 ft 12°c18000 ft 11°c16000 ft 10°c14000 ft 10°c12000 ft 6°c10000 ft 2°c8000 ft +2°c6000 ft +6°c4000 ft +12°c2000 ft +15°csurface +15°cwhich of following statements correct Assuming that msl pressure 3 25 hpa true altitude of an aircraft would actually be higher than indicated altitude. the isa temperature lapse rates 2°c/1000 ft at 2000 ft temperature +11°c at 4000 ft temperature +7°c at 6000 ft temperature +3°c at 8000 ft temperature 1°c at 10000 ft temperature 5°c at 12000 ft temperature 9°c at 14000 ft temperature 13°c at 16000 ft temperature 17°c at 18000 ft temperature 21°c at 20000 ft temperature 25°c apart from sea level we can see from observed temperatures that air warmer than isa throughout an aircraft at fl180 (for example) will be at a higher true altitude than 18000 ft (indicated altitude). Question 123-26
A significant inversion at low height a characteristic of Assuming that msl pressure 3 25 hpa true altitude of an aircraft would actually be higher than indicated altitude. air close to surface cooled significantly but air above it isn't the surface temperature falls below temperature of air above. Question 123-27
In order to reduce qfe to qnh which of following item s must be known Elevation of airfield. air close to surface cooled significantly but air above it isn't the surface temperature falls below temperature of air above. Question 123-28
The qnh equal to qfe if Elevation of airfield. air close to surface cooled significantly but air above it isn't the surface temperature falls below temperature of air above. Question 123-29
Which of following conditions gives highest value of qnh Qfe = 995 hpa elevation = 6 ft (488m). qfe=1000 hpa thus qnh = 1000 + (1200 / 27) = 1000 + 44 4 = 1044 4 hpa qfe=1003 hpa thus qnh = 1003 + (1200 / 27) = 1003 + 44 4 = 1047 4 hpa qfe=995 hpa thus qnh = 995 + (1200 / 27) = 995 + 44 4 = 1039 4 hpa qfe=995 hpa thus qnh = 995 + (1600 / 27) = 995 + 59 3 = 1054 3 hpa. Question 123-30
The pressure altitude equal to true altitude if Standard atmospheric conditions occur. pressure altitude the altitude you read on an altimeter (it's indicated altitude) true altitude depends on temperature pressure altitude only same as true altitude in isa conditions. Question 123-31
You must make an emergency landing at sea the qnh of a field on a nearby island with an elevation of 4000 ft 1025 hpa and temperature 20°c what your pressure altimeter reading when landing if 1025 hpa set in subscale Standard atmospheric conditions occur. with temperature below isa we are 'actually' below indicated altitude but with a subscale of 1025 hpa while landing on airport 4000 ft would have been correct (actual indicated) if you fly lower than indicated aiport altitude which qnh has been calculated correction will be reverse in that case in colder air our true (actual) altitude will be higher than altitude indicated on our altimeter if you perform an emergency landing at sea your altimeter will indicate 0 ft whereas you still are few meters above sea. Question 123-32
The troposphere Has a greater vertical extent above equator than above poles. with temperature below isa we are 'actually' below indicated altitude but with a subscale of 1025 hpa while landing on airport 4000 ft would have been correct (actual indicated) if you fly lower than indicated aiport altitude which qnh has been calculated correction will be reverse in that case in colder air our true (actual) altitude will be higher than altitude indicated on our altimeter if you perform an emergency landing at sea your altimeter will indicate 0 ft whereas you still are few meters above sea. Question 123-33
For a given airfield qfe 980 hpa and qnh 1000 hpa the approximate elevation of airfield Has a greater vertical extent above equator than above poles. the qfe indicates in standard atmosphere height of aircraft above official airport elevation (an altimeter set to qfe will therefore read zero when on ground) and you want to know approximate elevation of airfield ___________ qfe 980 hpa = read zero on altimeter | | ???m / 8m per hpa = 20 hpa (1000 980) | |_____________ qnh 1000 hpa 8m x 20 hpa = 160 metres. Question 123-34
Which true of temperature at tropopause It higher in polar regions than in equatorial regions. polar tropopause (8km) 45°c tropicale tropopause (15 km) 75°c equatorial tropopause (16 km) 80°c . Question 123-35
Around paris on january 3rd at 1800 utc surface temperature under shelter 3°c the sky covered 8 oktas of stratus qnh 1033 hpa if sky covered all night minimum temperature of night of january 3rd to january 4th should be Slightly below +3°c. the sky covered 8 oktas of stratus it's overcast the stratus cloud cover will act as a lid close to surface the heat kept close from ground there will still be a small temperature drop on a winter night thus minimum temperature should be slightly below +3°c. Question 123-36
On a clear sky continental ground surface wind calm minimum temperature reached approximately Half an hour after sunrise. the temperature falls continuously until a little after sunrise the lowest temperature occurs at about sunrise plus 30 minutes. Question 123-37
An isohypse contour Indicates true altitude of a pressure level. isohypses (contour lines) are drawn on a constant pressure chart therefore they indicate true altitude of a pressure level. Question 123-38
Before landing an altimeter set to qfe indicates In standard atmosphere height of aircraft above official airport elevation. qfe a 'q code' used pilots air traffic control to refer to barometric altimeter setting which will cause an altimeter to read height above a particular runway threshold an altimeter set to qfe will therefore read zero when on ground at beginning of runway this setting may be used during take off landing when flying in circuit a mnemonic the code 'q field elevation'. Question 123-39
In mid latitudes stratosphere extends on an average from In standard atmosphere height of aircraft above official airport elevation. qfe a 'q code' used pilots air traffic control to refer to barometric altimeter setting which will cause an altimeter to read height above a particular runway threshold an altimeter set to qfe will therefore read zero when on ground at beginning of runway this setting may be used during take off landing when flying in circuit a mnemonic the code 'q field elevation'. Question 123-40
An aircraft maintains a constant indicated altitude of 4500 ft from a 360 ft/amsl qnh 986 hpa to b 690 ft/amsl qnh 1011 hpa assuming that altimeter subscale setting remains unchanged at 986 hpa actual height of aircraft above surface at b will be In standard atmosphere height of aircraft above official airport elevation. The altimeter subscale setting remains unchanged at 986 hpa difference at b 1011 986 = 25 hpa x 27 ft = 675 ft 4500 ft 690 ft = 3810 ft actual height of aircraft above surface at b will be 3810 ft + 675 ft = 4485 ft gargameleatpl alt elevation = height so correct answer 3810 675= 3135 you should take a break 3135 ft your corret answer but if we provide an other answer (and an explanation) it might be a reason! when you will be over b with a subscale setting of 986 hpa you gonna turn selection knob in a counterclockwise direction to set 1011 hpa indicated altitude will then increased 25 hpa x 27 ft = 675 ft 4500 ft over b + 675 ft = 5175 ft b elevation 690 ft thus actual height of aircraft above surface at b will be 5175 690 = 4485 ft.
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