1-If the surface temperature is 15°C , then the temperature at 10000 FT in a current of ascending unsaturated air is:
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2-In an air mass with no clouds the surface temperature is 15°C and the temperature at 1000 m/AGL is 13°C. This layer of air is:
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3-The temperature at the surface is given as +15°C and at 4000 FT it is +9°C, the state of this layer is said to be:
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4-Atmospheric soundings give the following temperature profile: 3000 FT +15°C 6000 FT +8°C 10000 FT +1°C 14000 FT -6°C 18000 FT -14°C 24000 FT -26°C At which of the following flight levels is the risk for aircraft icing, in cloud, greatest?
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5-Which type of fog is likely to form when air having temperature of 15°C and dew point of 12°C blows at 10 knots over a sea surface having temperatures of 5°C ?
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6-The temperature at 10000 FT in the ICAO Standard Atmosphere is:
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7-If you are flying at FL 300 in an air mass that is 15°C warmer than a standard atmosphere, what is the outside temperature likely to be?
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8-An air temperature of -15°C at the 700 hPa level over central Europe in summer is
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9-On the approach, the surface temperature is given as -5°C. The freezing level is at 3000 FT/AGL. At 4000 FT/AGL, there is a solid cloud layer from which rain is falling. According to the weather briefing, the clouds are due to an inversion caused by warm air sliding up and over an inclined front. Would you expect icing?
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10-The following temperatures have been observed over a station at 1200 UTC. Assume the station is at MSL. Height in feet. Temperature in degrees C. 20000.-12 18000.-11 16000.-10 14000.-10 12000.-6 10000.-2 8000. +2 6000. +6 4000. +12 2000. +15 surface+15. Which of the following statements is correct ?
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11-The rate of cooling of ascending saturated air is less than the rate of cooling of ascending unsaturated air because:
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12-How, if at all, is the relative humidity of an unsaturated air mass influenced by temperature changes?
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13-The decrease in temperature, per 100 metres, in an unsaturated rising parcel of air is
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14-Given: Altimeter setting: 1013.2 hPa Altimeter reading: 5000 ft Outside air temperature at 5000 ft: +5°C QFE: 958 hPa QNH: 983 hPa What is the true height of the aeroplane above the aerodrome?
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15-At FL 180, the air temperature is -35°C. The air density at this level is:
0501
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16-A parcel of unsaturated air is forced to rise through an isothermal layer. So long as it remains unsaturated, the temperature of the parcel
05010847Air Masses and Fronts
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17-At an altitude of 1650 feet AMSL, a temperature of +15°C is measured. What will the temperature be at an altitude of 8200 feet, if you consider the temperature gradient of the Standard Atmosphere?
0501
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18-An outside air temperature of -35°C is measured while cruising at FL 200. What is the temperature deviation from the ISA at this level?
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19-In still air the temperature decreases at an average of 1.2°C per 100 m increase in altitude. This temperature change is called:
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20-An outside air temperature of -35°C is measured while cruising at FL 200. What is the temperature deviation from the ISA at this level
0501
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21-In an unsaturated layer in the friction layer the air is well mixed by turbulence. The layer remains unsaturated. After some time the vertical temperature profile will
05013644Thermodynamics
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22-How does relative humidity and the dewpoint in an unsaturated air mass change with varying temperature?
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23-Given: Altimeter setting: 1013.2 hPa Altimeter reading: 5000 ft Outside air temperature at 5000 ft: +5°C QFE: 958 hPa QNH: 983 hPa What is the true height of the aircraft above the aerodrome?
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24-A parcel of unsaturated air is lifted to just below the condensation level and then returned to its original level. What is the final temperature of the parcel of air?
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25-A temperature of +15°C is recorded at an altitude of 500 metres above sea level. If the vertical temperature gradient is that of a standard atmosphere, what will the temperature be at the summit of a mountain, 2500 metres above sea level?
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26-A vertical spacing of 1000 FT is the standard required separation between two FL. Under conditions of cold air advection (ISA -15°C), what would the true vertical separation be?
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27-Daily variation of the surface temperature will:
0501
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28-The temperature at 3000 ft. above mean sea level is forecast to be 3°C. What is the deviation from ICAO Standard Atmosphere?
0501
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29-You are flying at FL 300 where the outside air temperature is -57.5°C and the pressure at MSL is 1013.25 hPa. If you assume that the difference between the actual temperature and the temperature in the ISA is valid for the whole troposphere, then the true altitude is:
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30-If you are flying at FL 100 in an air mass that is 10°C warmer than a standard atmosphere, what is the outside temperature likely to be?
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31-An air temperature of -55°C at the 200 hPa level over central Europe in summer is
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32-An air temperature of -30°C at the 300 hPa level over central Europe in summer is
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33-You are at FL120 with an outside air temperature is -2°C. Where would you find the freezing level?
0501
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34-During the late afternoon an air temperature of +12°C and a dew point of +5°C were measured. What temperature change must at least occur during the night in order to induce saturation?
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35-The Variation of Air Density with Temperature:
0501
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36-The QNH of an airport at sea level is 983 hPa and the temperature deviation from ISA is -15°C below FL 100. What is the true altitude of FL 100?
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37-Surface temperature inversions are frequently generated by
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38-You plan a flight over a mountain range at a true altitude of 15000 FT/AMSL. The air is on an average 15°C colder than ISA, the pressure at sea level is 1003 hPa. What approximate indication should the altimeter (setting 1013.2 hPa) read?
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39-You are flying at FL 160. Outside air temperature is -27°C, and the pressure at sea level is 1003 hPa. What is the true altitude?
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40-You are flying at FL 200. Outside air temperature is -40°C, and the pressure at sea level is 1033 hPa. What is the true altitude?
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41-What intensity and type of airframe icing is most likely to occur when flying at FL 170 in AS with the outside air temperature at -20°C?
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42-The QNH at an airfield located 200 metres above sea level is 1009 hPa. The air temperature is 10°C lower than a standard atmosphere. What is the QFF?
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43-In a layer of air the decrease in temperature per 100 metres increase in height is more than 1°C. This layer can be described as being
0504022Thermodynamics
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44-You are flying at FL 160. Outside air temperature is -27°C, and the pressure at sea level is 1003 hPa. What is the true altitude?
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45-You are flying at FL 200. Outside air temperature is -40°C, and the pressure at sea level is 1033 hPa. What is the true altitude?
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46-In a layer of air the decrease in temperature per 100 metres increase in height is more than 1°C. This layer can be described as being
0501
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47-It is raining and the outside air temperature is -5°C. What would you decide if you have a propeller to operate in non-icing conditions only?
0501
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48-The QFF at an airfield located 400 metres above sea level is 1016 hPa. The air temperature is 10°C lower than a standard atmosphere. What is the QNH?
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49-The QFF at an airfield located 400 metres above sea level is 1016 hPa. The air temperature is 10°C higher than a standard atmosphere. What is the QNH?
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50-You have been flying for some time in dense layered cloud. The outside air temperature is -25°C. Which of the following statements is true?
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51-An inversion is a layer of air in which the temperature
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52-Surface-based temperature inversions are common during
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53-Around Paris on January 3rd at 1800 UTC, the surface temperature, under shelter, is 3°C. The sky is covered by 8 oktas of stratus. QNH is 1033 hPa. If the sky is covered all night, the minimum temperature of the night of January 3rd to January 4th should be
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54-If atmospheric conditions exist such that the temperature deviation is ISA +10°C in the lower troposphere up to 18000 FT, what is the actual layer thickness between FL 60 and FL 120 ?
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55-When water evaporates into unsaturated air
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56-The QNH at an airfield in California located 69 metres below sea level is 1018 hPa. The air temperature is 10°C higher than a standard atmosphere. What is the QFF?
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57-The QFF at an airfield in California located 69 metres below sea level is 1030 hPa. The air temperature is 10°C lower than a standard atmosphere. What is the QNH?
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58-You are flying with an outside air temperature of -12°C and a TAS of 250 kt at FL 150 through 8 oktas NS. What type and degree of icing is most probable?
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59-An isothermal layer is a layer of air in which the temperature
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60-The actual change of the temperature in the air mass with height is known as:
0501
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61-You intend to overfly a mountain range. The recommended minimum flight altitude is, according to the aviation chart, 15000 FT/AMSL. The air mass that you will fly through is on average 15°C warmer than the standard atmosphere. The altimeter is set to QNH (1023 hPa). At what altimeter reading will you effectively be at the recommended minimum flight altitude?
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62-At FL 180, the air temperature is -35°C.The air density at this level is:
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63-At FL 180, the air temperature is -35°C.The air density at this level is:
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64-For both saturated and unsaturated air instability will occur when the
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65-A sample of moist but unsaturated air may become saturated by
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66-A moist but unsaturated parcel of air becomes saturated by
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67-In which of these temperature bands is ice most likely to form on the aircraft's surface?
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68-Which of the following is a common cause of ground or surface temperature inversion ?
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69-You must make an emergency landing at sea. The QNH of a field on a nearby island with an elevation of 4000 FT is 1025 hPa and the temperature is -20°C. What is your pressure altimeter reading when landing if 1025 hPa is set in the subscale?
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70-The temperature at FL 140 is -12°C. What will the temperature be at FL 110 if the ICAO standard lapse rate is applied ?
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71-The temperature at FL 80 is +6°C. What will the temperature be at FL 130 if the ICAO standard lapse rate is applied ?
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72-The temperature at FL 160 is -22°C. What will the temperature be at FL 90 if the ICAO standard lapse rate is applied ?
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73-The temperature at FL 110 is -5°C. What will the temperature be at FL 50 if the ICAO standard lapse rate is applied ?
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74-What is, approximately, the temperature at 20000 FT in the ICAO Standard Atmosphere?
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75-Few 200 ft, Scattered 1200 ft, Broken 3500 ft, Overcast 10000 ft. How would that be reported in a METAR?
0501
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76-A layer in which the temperature decreases with 1°C per 100m increasing altitude is
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77-A given mass of air is saturated with water vapour (no condensed water). If temperature increases
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78-If a saturated air mass descends down a slope its temperature increases at
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79-If in a 100 m thick layer the temperature at the bottom of the layer is 10°C and at the top of the layer is 8°C then this layer is
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80-The 0°C isotherm is forecast to be at FL 50. At what FL would you expect a temperature of -6°C?
0501
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81-At a certain position, the temperature on the 300 hPa chart is -48°C; according to the tropopause chart, the tropopause is at FL 330. What is the most likely temperature at FL 350 ?
05019The Atmosphere
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82-A parcel of rising air stays unsaturated. Which of the following statements is correct?
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83-When a mass of unsaturated air descends, what effect will it have on relative humidity?
0501208Thermodynamics
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84-In unstable air, surface visibility is most likely to be restricted by
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85-When warm air moves over a colder surface, __________.
0501
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86-When Air density will be lowest at the Earth's surface:
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87-In unstable air, surface visibility is most likely to be restricted by
0501
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88-When cold air moves over a warmer surface, __________.
0501
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89-Advection of very cold air over a warm sea current can cause:
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90-The temperature deviation from ISA (to the nearest °C) overhead Charleston (33°N 080°W) at FL 340 is
05013585CAT
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91-An aircraft flies into freezing rain in an area with a temperature below 0°C. The type of icing it will most likely encounter is
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92-The 0° isotherm is forecast to be at FL 50. At what FL would you expect a temperature of -6° C?
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93-The type of icing that occurs in dense clouds with large supercooled drops that have a temperature of -5°C is most likely to be
0504156Flight Hazards
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94-If you are flying at FL 120 and the outside temperature is -2°C, at what altitude will the "freezing level" be?
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95-The temperature at 2000ft AMSL is forecast to be +5°C: compared to the International Standard Atmosphere (ISA) this is:
0501
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96-You are approaching to an airmass with a temperature of 6 C at 10000ft. Which altitude should you be in order to avoid clear icing?
0501
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97-The air mass affecting position "C" is most likely to be
05013623UncategorizedWind
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98-The QNH at an airfield located at mean sea level is 1022 hPa. The air temperature is not available. What is the QFF?
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99-The QNH at an airfield located 200 metres above sea level is 1022 hPa. The air temperature is not available. What is the QFF?
0502243The Atmosphere
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100-The decrease in temperature, per 100 metres, in a saturated rising parcel of air at lower level of the atmosphere is approximately