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What information is required to convert a minimum safe altitude into a lowest ? [ Preparation civilian ]

Question 124-1 : Lowest value of qnh and the highest negative temperature deviation from isa highest value of qnh and the highest negative temperature deviation from isa highest value of qnh and the highest positive temperature deviation from isa lowest value of qnh and the lowest negative temperature deviation from isa

Admin .lowest value of qnh the lowest usable flight level is determined by the atmospheric pressure in the area of operation it will give the highest safety margin .highest negative temperature deviation from isa since cold air is denser than warm air when operating in temperatures that are colder than standard our true altitude is lower than the altimeter indication .if we convert a minimum safe altitude into a flight level by choosing the lowest aera qnh value and the highest negative temperature deviation from isa we will be ok at that flight level and better off wherever you go elsewhere in the region exemple 224 Lowest value of qnh and the highest negative temperature deviation from isa.Lowest value of qnh and the highest negative temperature deviation from isa.

What is the relationship if any between qfe and qnh at an airport situated 50 ?

Question 124-2 : Qfe is greater than qnh qfe is smaller than qnh qfe equals qnh no clear relationship exists

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 .on the airport in order to read the airport elevation of 50 ft on your altimeter you must set qnh if you want to read 0 ft you must set qfe .you have to turn clockwise the adjustment knob qfe will be greater than qnh . 513 exemple 228 Qfe is greater than qnh.Qfe is greater than qnh.

You plan a flight over a mountain range at a true altitude of 15000 ft/amsl the ?

Question 124-3 : 16230 ft 15690 ft 14370 ft 13830 ft

Admin .the following rules shall be considered for altimetry calculations . the value for the barometric lapse rate near mean sea level is 27 ft 8 m per 1 hpa . to determine the true altitude/height the following rule of thumb called the '4% rule' shall be used the altitude/height changes by 4% for each 10°c temperature deviation from isa .1013 1003 = 10 hpa.10 x 27 = 270 ft.15000 ft + 270 ft = 15270 ft your altimeter will over read .altitude/height changes by 4% for each 10°c temperature deviation from isa.temperature correction = 4 x 15 27 x 15.temperature correction = 916 2 ft.approximate indication should the altimeter read 15270 + 916 = 16186 ft .close enough to the result desired .iguano .maybe is not an error but i thought that when its colder than isa you have to subtract the temperature correction . .the question states what approximate indication should the altimeter setting 1013 2 hpa read our altimeter must read a higher altitude than the true altitude we currently want in those conditions cold air and low qnh to be sure to overfly the mountain at actually 15000 ft/amsl exemple 232 16230 ft.16230 ft.

During a flight at fl 100 from marseille qnh 1012 hpa to palma de mallorca qnh ?

Question 124-4 : The air at marseille is warmer than that at palma de mallorca the altimeters are erroneous and need to be tested the air at marseille is colder than that at palma de mallorca one of the two qnh values may be incorrect

Admin .to be at the same true altitude over the 1012hpa datum marseille the air must be warmer than it is over the 1015hpa pressure datum palma de mallorca exemple 236 The air at marseille is warmer than that at palma de mallorca.The air at marseille is warmer than that at palma de mallorca.

An aircraft lands at an airport airport elevation 1240 ft qnh 1008 hpa the ?

Question 124-5 : 1375 ft 1200 ft 1105 ft 1280 ft

Admin .you are on the runway with a setting of 1008 hpa your altimeter indicates 1240 ft .if you turn the altimeter setting adjustement knob in a clockwise direction to increase the subscale to 1013 hpa the indicated alitude will increase the needle will turn in the same direction . 514.1013 1008 = 5 hpa.5 hpa x 27 ft/hpa = 135 ft .1240 + 135 = 1375 ft exemple 240 1375 ft.1375 ft.

After landing at an aerodrome aerodrome elevation 1715 ft the altimeter ?

Question 124-6 : 1028 hpa 1015 hpa 1013 hpa 998 hpa

Admin .you are on the runway with a setting of 1013 hpa your altimeter indicates 1310 ft .if you want to read aerodrome elevation you have to turn altimeter setting adjustement knob in a clockwise direction to increase the indicated alitude . 514.1715 1310 = 405 ft.405 ft / 27 ft/hpa = 15 hpa .1013 + 15 = 1028 hpa exemple 244 1028 hpa.1028 hpa.

You intend to overfly a mountain range the recommended minimum flight altitude ?

Question 124-7 : 14100 ft 13830 ft 14370 ft 15900 ft

Admin .to determine the true altitude/height the following rule of thumb called the '4% rule' shall be used .the altitude/height changes by 4% for each 10°c temperature deviation from isa .15000 x 4 x 1 5 = 900 ft.you are flying at 15000 + 900 = 15900 ft .thus you can fly 900 ft lower than the stated 15900 ft which will give you an indicated altitude of 14100 ft .the question states the altimeter is set to qnh 1023 hpa we don't change this value we are not going to fly on flight level 1013 hpa exemple 248 14100 ft.14100 ft.

You are flying at fl 130 and your true altitude is 12000 ft what is the ?

Question 124-8 : Isa 20°c isa +/ 0°c isa +20°c isa +12°c

Admin .to determine the true altitude/height the following rule of thumb called the '4% rule' shall be used .the altitude/height changes by 4% for each 10°c temperature deviation from isa .4 x 13 x temperature deviation = 1000 ft.temperature deviation = 1000 ft / 4 x 13 = 19 2°c.true altitude is lower than pressure altitude so this is 'minus' 20°c exemple 252 Isa -20°c.Isa -20°c.

Which one of the following statements applies to the tropopause ?

Question 124-9 : It separates the troposphere from the stratosphere it is by definition an isothermal layer it indicates a strong temperature lapse rate it is by definition a temperature inversion

Admin .the tropopause is a boundary with no finite thickness the tropopause is the region of the atmosphere where the environmental lapse rate changes from positive as it behaves in the troposphere to the stratospheric negative one following is the exact definition used by the world meteorological organization the boundary between the troposphere and the stratosphere where an abrupt change in lapse rate usually occurs it is defined as the lowest level at which the lapse rate decreases to 2 °c/km or less provided that the average lapse rate between this level and all higher levels within 2 km does not exceed 2 °c/km exemple 256 It separates the troposphere from the stratosphereIt separates the troposphere from the stratosphere

The 0° isotherm is forecast to be at fl 50 at what fl would you expect a ?

Question 124-10 : Fl 80 fl 20 fl 100 fl 110

Admin .the temperature lapse rates of the troposphere is mean value 0 65°c/100 m or 2°c/1000 ft .6° / 2° per 1000 ft = 3000 ft .fl50 + 3000 ft = fl80 exemple 260 Fl 80.Fl 80.

A vertical spacing of 1000 ft is the standard required separation between two ?

Question 124-11 : Less than 1000 ft it remains 1000 ft more than 1000 ft without qnh information it can not be determined

Admin . 515.in flight level aircraft are using the same subscale reference 1013 25 hpa .theoretical separation is 1000 ft actual separation is less when air mass is colder than standard exemple 264 Less than 1000 ft.Less than 1000 ft.

Over paris at what flight level would you expect to find the tropopause ?

Question 124-12 : Fl 300 fl 330 fl 150 fl 280

Admin .tropopause is at fl290 north est and at fl340 south west of paris .we would expect to find the tropopause at fl300 over paris exemple 268 Fl 300.Fl 300.

What is the approximate height of the tropopause between munich and helsinki . ?

Question 124-13 : Fl 340 fl 280 fl 300 fl 390

Admin . 523.the approximate height of the tropopause between munich and helsinki is fl340 .400 on the one hand 300 on the other hand even if the height change is not uniform fl340 remains the only valid answer exemple 272 Fl 340.Fl 340.

At what approximate flight level is the tropopause over frankfurt . 276 ?

Question 124-14 : Fl 330 fl 300 fl 350 fl 240

Admin . 526.you have to interpolate between different heights placing the tropopause at approximately fl 330 over frankfurt exemple 276 Fl 330.Fl 330.

The temperature at fl 330 overhead london will be . 278 ?

Question 124-15 : 45°c 39°c 33°c 57°c

Admin .the height of the tropopause over london is fl290 above the tropopause the temperature stays constant close to london t° is around 45°c at fl390 so between fl290 and fl390 no change exemple 280 -45°c.-45°c.

What is the average temperature at fl 160 between oslo and paris . 282 ?

Question 124-16 : 19°c 23°c 15°c 25°c

Admin .this chart is given for fl180 .at fl180 between oslo and paris average temperature is . 25 + 24 + 23 + 21 + 21 /5 = 114 / 5 = around 23°c .average temperature at fl160 is 4° warmer 2° per 1000ft = 19°c exemple 284 -19°c.-19°c.

What is the temperature deviation in degrees celsius from the icao standard ?

Question 124-17 : Isa 13°c isa 2°c isa +13°c isa +2°c

Admin .at fl180 in a standard atmosphere temperature is .15° 2° x 18 = 21ºc.on the chart overhead frankfurt temperature at fl180 is 34°c.temperature deviation is 34° + 21° = 13°c .we can say that temperature overhead frankfurt at fl180 is colder than icao standard atmosphere exemple 288 Isa -13°cIsa -13°c

What oat would you expect at fl 200 over geneva . 289 ?

Question 124-18 : 24°c 20°c 16°c 28°c

Admin .this chart is given for fl180 .at fl180 average temperature is . 20 + 21 + 19 + 21 /4 = 81 / 4 = around 20°c .average temperature at fl200 is 4° colder 2° per 1000ft = 24°c exemple 292 -24°c.-24°c.

An altimeter adjusted to 1013 hpa indicates an altitude of 3600 ft should this ?

Question 124-19 : 3006 ft 2922 ft 4278 ft 4194 ft

Admin .your altimeter adjusted to 1013 hpa indicates an altitude of 3600 ft .you have to turn altimeter setting adjustement knob in a counter clockwise direction to set 991 hpa in the subscale window the altimeter needle will turn in the same direction counter clockwise . 541.decreasing altimeter setting by 22 hpa 1013 991 .22 hpa x 27 ft/hpa = 594 ft .indicated altitude decreases by 594 ft 3600 594 = 3006 ft exemple 296 3006 ft.3006 ft.

In geneva the local qnh is 994 hpa the elevation of geneva is 1411 ft the qfe ?

Question 124-20 : 942 hpa 967 hpa 961 hpa 952 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 .with a subscale setting of 994 hpa on the ground at geneva your altimeter reads 1411 ft .you want to read 0 ft .you must turn anti clockwise the adjustment knob 1 hpa = 27 ft .1411 / 27 = 50 hpa .994 52 = 942 hpa . 531 exemple 300 942 hpa.942 hpa.

An aircraft is flying at fl 80 the local qnh is 1000 hpa after the second ?

Question 124-21 : 7650 ft 8600 ft 8350 ft 8000 ft

Admin .your main altimeter remains at 1013 hpa with a reading of 8000 ft the second is set at 1000 hpa you have to turn altimeter setting adjustement knob in a counter clockwise direction the altimeter needle will turn also counter clockwise . 541.decreasing altimeter setting by 13 hpa .13 hpa x 27 ft/hpa = 351 ft .indicated altitude decreases by 351 ft 8000 351 = 7649 ft exemple 304 7650 ft.7650 ft.

The barometric compensator of an altimeter is locked on reference 1013 2 hpa ?

Question 124-22 : 20 ft 11 ft 10 ft 560 ft

Admin .1023 1013 = 10 hpa .10 hpa x 27 ft/hpa = 270 ft .290 ft 270 ft = 20 ft .imagine if you landed on this airfield with the correct subscale setting 1023 hpa the reading on the altimeter on the ground will be 290 ft now if you set 1013 hpa in the subscale the needles will turn couter clockwise and the altimeter will read 20 ft exemple 308 20 ft.20 ft.

The upper wind and temperature chart of 250 hpa corresponds in a standard ?

Question 124-23 : 34 000 ft 39 000 ft 30 000 ft 32 000 ft

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/27 ft 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 312 34 000 ft.34 000 ft.

Going from the equator to the north pole the altitude of the tropopause ?

Question 124-24 : Decreases and its temperature increases increases and its temperature increases increases and its temperature decreases decreases and its temperature decreases

Admin . 491.height of the tropopause .polar tropopause 8 km 45°c .tropicale tropopause 15 km 75°c .equatorial tropopause 16 km 80°c exemple 316 Decreases and its temperature increases.Decreases and its temperature increases.

Atmospheric soundings give the following temperature profile .3000 ft ?

Question 124-25 : 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 320 Fl 150.Fl 150.

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

Question 124-26 : 5 km 11 km 3 km 8 km

exemple 324 5 km.5 km.

The thickness of the troposphere varies with ?

Question 124-27 : 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 328 Latitude.Latitude.

In the lower part of the stratosphere the temperature ?

Question 124-28 : 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 332 Is almost constant.Is almost constant.

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

Question 124-29 : 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 336 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 124-30 : 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 340 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 124-31 : 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 344 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 124-32 : 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 348 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 124-33 : 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 352 1022 hpa.1022 hpa.

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

Question 124-34 : 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 356 More than 1018 hpa.More than 1018 hpa.

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

Question 124-35 : 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 360 More than 1030 hpaMore than 1030 hpa

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

Question 124-36 : 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 364 1005 hpa.1005 hpa.

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

Question 124-37 : 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 368 1025 hpa.1025 hpa.

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

Question 124-38 : 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 372 990 hpa.990 hpa.

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

Question 124-39 : 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 376 1000 hpa.1000 hpa.

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

Question 124-40 : 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 380 -30°c.-30°c.

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