{
  "50": [
    {
      "num": 16,
      "text": "Which conditions are likely for the formation of advection fog?",
      "options": {
        "A": "Warm, humid air cools during a cloudy night",
        "B": "Cold, humid air moves over a warm ocean",
        "C": "Humidity evaporates from warm, humid ground into cold air",
        "D": "Warm, humid air moves over a cold surface"
      },
      "correct": "D"
    },
    {
      "num": 17,
      "text": "What process results in the formation of \"advection fog\"?",
      "options": {
        "A": "Cold, moist air is being moved across warm ground areas",
        "B": "Cold, moist air mixes with warm, moist air",
        "C": "Prolonged radiation during nights clear of clouds",
        "D": "Warm, moist air is moved across cold ground areas"
      },
      "correct": "D"
    },
    {
      "num": 18,
      "text": "What pressure pattern can be observed when a cold front is passing?",
      "options": {
        "A": "Continually increasing pressure",
        "B": "Shortly decreasing, thereafter increasing pressure",
        "C": "Continually decreasing pressure",
        "D": "Constant pressure pattern"
      },
      "correct": "B"
    },
    {
      "num": 19,
      "text": "What frontal line divides subtropical air from polar cold air, in particular across Central Europe?",
      "options": {
        "A": "Warm front",
        "B": "Cold front",
        "C": "Occlusion",
        "D": "Polar front"
      },
      "correct": "D"
    },
    {
      "num": 20,
      "text": "What weather conditions in Central Europe are typically found in high pressure areas during summer?",
      "options": {
        "A": "Large isobar spacing with calm winds, formation of local wind systems",
        "B": "Small isobar spacing with calm winds, formation of local wind systems",
        "C": "Large isobar spacing with strong prevailing westerly winds",
        "D": "Small isobar spacing with strong prevailing northerly winds"
      },
      "correct": "A"
    },
    {
      "num": 21,
      "text": "What weather conditions can be expected in high pressure areas during winter?",
      "options": {
        "A": "Calm winds and widespread areas with high fog",
        "B": "Changing weather with passing of frontal lines",
        "C": "Squall lines and thunderstorms",
        "D": "Calm weather and cloud dissipation, few high Cu"
      },
      "correct": "A"
    },
    {
      "num": 22,
      "text": "What temperatures are most dangerous with respect to airframe icing?",
      "options": {
        "A": ".+20° to -5° C",
        "B": ".-20° to -40° C",
        "C": ".+5° to -10° C",
        "D": "0° to -12° C"
      },
      "correct": "D"
    },
    {
      "num": 23,
      "text": "Which type of ice forms by large, supercooled droplets hitting the front surfaces of an aircraft?",
      "options": {
        "A": "Hoar frost",
        "B": "Clear ice",
        "C": "Rime ice",
        "D": "Mixed ice"
      },
      "correct": "B"
    },
    {
      "num": 24,
      "text": "What conditions are mandatory for the formation of thermal thunderstorms?",
      "options": {
        "A": "Absolutely stable atmosphere, high temperature and high humidity",
        "B": "Absolutely stable atmosphere, high temperature and low humidity",
        "C": "Conditionally unstable atmosphere, high temperature and high humidity",
        "D": "Conditionally unstable atmosphere, low temperature and low humidity"
      },
      "correct": "C"
    },
    {
      "num": 25,
      "text": "Which stage of a thunderstorm is dominated by updrafts?",
      "options": {
        "A": "Dissipating stage",
        "B": "Mature stage",
        "C": "Cumulus stage",
        "D": "Upwind stage"
      },
      "correct": "C"
    },
    {
      "num": 26,
      "text": "Heavy downdrafts and strong wind shear close to the ground can be expected...",
      "options": {
        "A": "Near the rainfall areas of heavy showers or thunderstorms.",
        "B": "During approach to an airfield at the coast with a strong sea breeze.",
        "C": "During cold, clear nights with the formation of radiation fog.",
        "D": "During warm summer days with high, flatted Cu clouds."
      },
      "correct": "A"
    },
    {
      "num": 27,
      "text": "Which weather chart shows the actual air pressure as in MSL along with pressure centers and fronts?",
      "options": {
        "A": "Wind chart",
        "B": "Surface weather chart",
        "C": "Prognostic chart",
        "D": "Hypsometric chart"
      },
      "correct": "B"
    },
    {
      "num": 28,
      "text": "What information can be obtained from satallite images?",
      "options": {
        "A": "Overview of cloud covers and front lines",
        "B": "Turbulence and icing",
        "C": "Temperature and dew point of environmental air",
        "D": "Flight visibility, ground visibility, and ground contact"
      },
      "correct": "A"
    },
    {
      "num": 29,
      "text": "What information can be found in the ATIS, but not in a METAR?",
      "options": {
        "A": "Operational information such as runway in use and transition level",
        "B": "Information about current weather, for example types of precipitation",
        "C": "Approach information, such as ground visibility and cloud base",
        "D": "Information about mean wind speeds, maximum speeds in gusts if applicable"
      },
      "correct": "A"
    },
    {
      "num": 30,
      "text": "What type of cloud indicates thermal updrafts?",
      "options": {
        "A": "Stratus",
        "B": "Cirrus",
        "C": "Cumulus",
        "D": "Lenticularis"
      },
      "correct": "C"
    },
    {
      "num": 36,
      "text": "The saturated adiabatic lapse rate is...",
      "options": {
        "A": "Equal to the dry adiabatic lapse rate.",
        "B": "Higher than the dry adiabatic lapse rate.",
        "C": "Proportional to the dry adiabatic lapse rate.",
        "D": "Lower than the dry adiabatic lapse rate."
      },
      "correct": "D"
    },
    {
      "num": 37,
      "text": "The dry adiabatic lapse rate has a value of...",
      "options": {
        "A": "0,65° C / 100 m.",
        "B": "1,0° C / 100 m.",
        "C": "2° / 1000 ft.",
        "D": "0,6° C / 100 m."
      },
      "correct": "B"
    },
    {
      "num": 38,
      "text": "What weather conditions may be expected during conditionally unstable conditions?",
      "options": {
        "A": "Towering cumulus, isolated showers of rain or thunderstorms",
        "B": "Layered clouds up to high levels, prolonged rain or snow",
        "C": "Sky clear of clouds, sunshine, low winds",
        "D": "Shallow cumulus clouds with base at medium levels"
      },
      "correct": "A"
    },
    {
      "num": 39,
      "text": "What cloud type does the picture show? See figure (MET-004). Siehe Anlage 3",
      "options": {
        "A": "Altocumulus",
        "B": "Cirrus",
        "C": "Cumulus",
        "D": "Stratus"
      },
      "correct": "B"
    },
    {
      "num": 40,
      "text": "The formation of medium to large precipitation particles requires...",
      "options": {
        "A": "Strong updrafts.",
        "B": "An inversion layer.",
        "C": "A high cloud base.",
        "D": "Strong wind."
      },
      "correct": "A"
    },
    {
      "num": 41,
      "text": "The symbol labeled (2) as shown in the picture is a / an... See figure (MET-005) Siehe Anlage 4",
      "options": {
        "A": "Front aloft.",
        "B": "Cold front.",
        "C": "Occlusion.",
        "D": "Warm front."
      },
      "correct": "D"
    },
    {
      "num": 42,
      "text": "What visual flight conditions can be expected within the warm sector of a polar front low during summer time?",
      "options": {
        "A": "Good visibility, some isolated high clouds",
        "B": "Moderate to good visibility, scattered clouds",
        "C": "Visibilty less than 1000 m, cloud-covered ground",
        "D": "Moderate visibility, heavy showers and thunderstorms"
      },
      "correct": "B"
    },
    {
      "num": 43,
      "text": "What visual flight conditions can be expected after the passage of a cold front?",
      "options": {
        "A": "Good visiblity, formation of cumulus clouds with showers of rain or snow",
        "B": "Poor visibility, formation of overcast or ground-covering stratus clouds, snow",
        "C": "Scattered cloud layers, visbility more than 5 km, formation of shallow cumulus clouds",
        "D": "Medium visibility with lowering cloud bases, onset of prolonged precipitation"
      },
      "correct": "A"
    },
    {
      "num": 44,
      "text": "What is the usual direction of movement of a polar front low?",
      "options": {
        "A": "Parallel to the the warm-sector isobars",
        "B": "To the northeast during winter, to the southeast during summer",
        "C": "Parallel to the warm front line to the south",
        "D": "To the northwest during winter, to the southwest during summer"
      },
      "correct": "A"
    },
    {
      "num": 45,
      "text": "What pressure pattern can be observed during the passage of a polar front low?",
      "options": {
        "A": "Rising pressure in front of the warm front, constant pressure within the warm sector, rising pressure behind the cold front",
        "B": "Rising pressure in front of the warm front, rising pressure within the warm sector, falling pressure behind the cold front",
        "C": "Falling pressure in front of the warm front, constant pressure within the warm sector, rising pressure behind the cold front",
        "D": "Falling pressure in front of the warm front, constant pressure within the warm sector, falling pressure behind the cold front"
      },
      "correct": "C"
    },
    {
      "num": 46,
      "text": "What change of wind direction can be expected during the passage of a polar front low in Central Europe?",
      "options": {
        "A": "Backing wind during passage of the warm front, veering wind during passage of the cold front",
        "B": "Veering wind during passage of the warm front, veering wind during passage of the cold front",
        "C": "Veering wind during passage of the warm front, backing wind during passage of the cold front",
        "D": "Backing wind during passage of the warm front, backing wind during passage of the cold front"
      },
      "correct": "B"
    },
    {
      "num": 47,
      "text": "What pressure pattern may result from cold-air inflow in high tropospheric layers?",
      "options": {
        "A": "Alternating pressure",
        "B": "Formation of a large ground low",
        "C": "Formation of a high in the upper troposphere",
        "D": "Formation of a low in the upper troposphere"
      },
      "correct": "D"
    },
    {
      "num": 48,
      "text": "Cold air inflow in high tropospheric layers may result in...",
      "options": {
        "A": "Showers and thunderstorms.",
        "B": "Frontal weather.",
        "C": "Calm weather and cloud dissipation",
        "D": "Stabilisation and calm weather."
      },
      "correct": "A"
    },
    {
      "num": 49,
      "text": "How does inflowing cold air affect the shape and vertical distance between pressure layers?",
      "options": {
        "A": "Increasing vertical distance, raise in height (high pressure)",
        "B": "Decreasing vertical distance, raise in height (high pressure)",
        "C": "Decrease in vertical distance, lowering in height (low pressure)",
        "D": "Increase in vertical distance, lowering in height (low pressure)"
      },
      "correct": "C"
    },
    {
      "num": 50,
      "text": "What weather conditions can be expected in high pressure areas during summer?",
      "options": {
        "A": "Calm weather and cloud dissipation, few high Cu",
        "B": "Changing weather with passing of frontal lines",
        "C": "Squall lines and thunderstorms",
        "D": "Calm winds and widespread areas with high fog"
      },
      "correct": "A"
    },
    {
      "num": 51,
      "text": "What weather conditions can be expected during \"Foehn\" on the windward side of a mountain range?",
      "options": {
        "A": "Layered clouds, mountains obscured, poor visibility, moderate or heavy rain",
        "B": "Dissipating clouds with unusual warming, accompanied by strong, gusty winds",
        "C": "Calm wind and forming of high stratus clouds (high fog)",
        "D": "Scattered cumulus clouds with showers and thunderstorms"
      },
      "correct": "A"
    },
    {
      "num": 52,
      "text": "What chart shows areas of precipitation?",
      "options": {
        "A": "Satellite picture",
        "B": "Wind chart",
        "C": "Radar picture",
        "D": "GAFOR"
      },
      "correct": "C"
    },
    {
      "num": 53,
      "text": "An inversion is a layer ...",
      "options": {
        "A": "With constant temperature with increasing height",
        "B": "With increasing pressure with increasing height.",
        "C": "With increasing temperature with increasing height.",
        "D": "With decreasing temperature with increasing height."
      },
      "correct": "C"
    },
    {
      "num": 61,
      "text": "What condition may prevent the formation of \"radiation fog\"?",
      "options": {
        "A": "Calm wind",
        "B": "Clear night, no clouds",
        "C": "Low spread",
        "D": "Overcast cloud cover"
      },
      "correct": "D"
    },
    {
      "num": 62,
      "text": "The symbol labeled (3) as shown in the picture is a / an... See figure (MET-005) Siehe Anlage 4",
      "options": {
        "A": "Cold front.",
        "B": "Warm front.",
        "C": "Front aloft.",
        "D": "Occlusion."
      },
      "correct": "D"
    },
    {
      "num": 63,
      "text": "A boundary between a cold polar air mass and a warm subtropical air mass showing no horizontal displacement is called...",
      "options": {
        "A": "Cold front.",
        "B": "Warm front.",
        "C": "Stationary front.",
        "D": "Occluded front."
      },
      "correct": "C"
    },
    {
      "num": 64,
      "text": "What situation may result in the occurrence of severe wind shear?",
      "options": {
        "A": "Flying ahead of a warm front with visible Ci clouds",
        "B": "Cross-country flying below Cu clouds with about 4 octas coverage",
        "C": "During final approach, 30 min after a heavy shower has passed the airfield",
        "D": "When a shower is visible close to the airfield"
      },
      "correct": "D"
    },
    {
      "num": 65,
      "text": "What kind of reduction in visibility is not very sensitive to changes in temperature?",
      "options": {
        "A": "Radiation fog (FG)",
        "B": "Mist (BR)",
        "C": "Patches of fog (BCFG)",
        "D": "Haze (HZ)"
      },
      "correct": "D"
    },
    {
      "num": 66,
      "text": "In a METAR, \"(moderate) showers of rain\" are designated by the identifier...",
      "options": {
        "A": ".+TSRA",
        "B": "SHRA.",
        "C": "TS.",
        "D": ".+RA."
      },
      "correct": "B"
    },
    {
      "num": 67,
      "text": "SIGMET warnings are issued for...",
      "options": {
        "A": "Specific routings.",
        "B": "Countries.",
        "C": "FIRs / UIRs.",
        "D": "Airports."
      },
      "correct": "C"
    },
    {
      "num": 68,
      "text": "Mountain side updrafts can be intensified by ...",
      "options": {
        "A": "Solar irradiation on the lee side",
        "B": "Thermal radiation of the windward side during the night",
        "C": "Solar irradiation on the windward side",
        "D": "By warming of upper atmospheric layers"
      },
      "correct": "C"
    },
    {
      "num": 76,
      "text": "Clouds in high layers are referred to as...",
      "options": {
        "A": "Cirro-.",
        "B": "Strato-.",
        "C": "Nimbo-.",
        "D": "Alto-."
      },
      "correct": "A"
    },
    {
      "num": 77,
      "text": "What factor may affect the top of cumulus clouds?",
      "options": {
        "A": "The spread",
        "B": "Relative humidity",
        "C": "The absolute humidity",
        "D": "The presence of an inversion layer"
      },
      "correct": "D"
    },
    {
      "num": 78,
      "text": "What factors may indicate a tendency to fog formation?",
      "options": {
        "A": "Strong winds, decreasing temperature",
        "B": "Low spread, decreasing temperature",
        "C": "Low pressure, increasing temperature",
        "D": "Low spread, increasing temperature"
      },
      "correct": "B"
    },
    {
      "num": 79,
      "text": "What process results in the formation of \"orographic fog\" (\"hill fog\")?",
      "options": {
        "A": "Prolonged radiation during nights clear of clouds",
        "B": "Warm, moist air is moved across a hill or a mountain range",
        "C": "Evaporation from warm, moist ground area into very cold air",
        "D": "Cold, moist air mixes with warm, moist air"
      },
      "correct": "B"
    },
    {
      "num": 80,
      "text": "What factors are required for the formation of precipitation in clouds?",
      "options": {
        "A": "The presence of an inversion layer",
        "B": "Moderate to strong updrafts",
        "C": "Calm winds and intensive sunlight insolation",
        "D": "High humidity and high temperatures"
      },
      "correct": "B"
    },
    {
      "num": 81,
      "text": "What wind conditions can be expected in areas showing large distances between isobars?",
      "options": {
        "A": "Strong prevailing westerly winds with rapid veering",
        "B": "Strong prevailing easterly winds with rapid backing",
        "C": "Formation of local wind systems with strong prevailing westerly winds",
        "D": "Variable winds, formation of local wind systems"
      },
      "correct": "D"
    },
    {
      "num": 82,
      "text": "Under which conditions \"back side weather\" (\"Rückseitenwetter\") can be expected?",
      "options": {
        "A": "After passing of a cold front",
        "B": "Before passing of an occlusion",
        "C": "During Foehn at the lee side",
        "D": "After passing of a warm front"
      },
      "correct": "A"
    },
    {
      "num": 83,
      "text": "What wind is reportet as 225/15 ?",
      "options": {
        "A": "North-east wind with 15 kt",
        "B": "South-west wind with 15 kt",
        "C": "South-west wind with 15 km/h",
        "D": "North-east wind with 15 km/h"
      },
      "correct": "B"
    },
    {
      "num": 84,
      "text": "What weather is likely to be experienced during \"Foehn\" in the Bavarian area close to the alps?",
      "options": {
        "A": "Cold, humid downhill wind on the lee side of the alps, flat pressure pattern",
        "B": "Nimbostratus cloud in the southern alps, rotor clouds at the lee side, warm and dry wind",
        "C": "High pressure area overhead Biskaya and low pressure area in Eastern Europe",
        "D": "Nimbostratus cloud in the northern alps, rotor clouds at the windward side, warm and dry wind"
      },
      "correct": "B"
    }
  ]
}