Index - Atpl Campus

100 item has been found

1-The actual change of the temperature in the air mass with height is known as:

050 1

The actual lapse rate (LR) The temperature curve The environmental lapse rate (ELR) The adiabatic lapse rate (ALR)

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2-How does relative humidity and the dewpoint in an unsaturated air mass change with varying temperature?

050 1207 Thermodynamics

When temperature decreases, the relative humidity and the dewpoint remain constant. When temperature increases, the relative humidity decreases, and the dewpoint remains constant. When temperature increases, the relative humidity increases, and the dewpoint decreases. When temperature decreases, the relative humidity decreases, and the dewpoint increases.

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3-In still air the temperature decreases at an average of 1.2°C per 100 m increase in altitude. This temperature change is called:

050 4143 The Atmosphere

saturated adiabatic lapse rate Environmental lapse rate normal lapse rate dry adiabatic lapse rate

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4-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:

050 2125 The Atmosphere

conditionally unstable a layer of heavy turbulence stable unstable

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5-A given mass of air is saturated with water vapour (no condensed water). If temperature increases

050 16759 Thermodynamics

the amount of water vapour decreases the amount of water vapour remains constant relative humidity remains constant relative humidity increases

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6-If a saturated air mass descends down a slope its temperature increases at

050 2130 Thermodynamics

the same rate as if the air mass were dry. a higher rate than in dry air, as it gives up latent evaporation heat. a lower rate than in dry air, as evaporation absorbs heat. a lower rate than in dry air, as condensation gives out heat.

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7-How, if at all, is the relative humidity of an unsaturated air mass influenced by temperature changes?

050 1206 Thermodynamics

It is only influenced by the amount of water vapour. It is not influenced by temperature changes. It increases with increasing temperature. It decreases with increasing temperature.

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8-The pressure change with height of the atmosphere:

050 1

decreases at a decreasing rate as height increases. decreases at a constant rate as height increases. decreases at a constant rate up to the tropopause and then remains constant. decreases at an increasing rate as height increases.

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9-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:

050 15416 The Atmosphere

30000 ft 27000 ft 31500 ft 28500 ft

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10-What are the typical differences with regard to the temperature and humidity between an air mass with its origin in the Azores and an air mass with its origin over northern Russia ?

050 1253 Air Masses and Fronts

The air of the Azores is warmer and more humid than the North-Russian air. The North-Russian air is warmer and dryer than the air of the Azores. The North-Russian air is colder and more humid than the air of the Azores. The air of the Azores is warmer and dryer than the North-Russian air.

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11-An air mass is:

050 13652 Air Masses and Fronts

a large body of air with temperature and humidity constant in the vertical. a large body of air within which the temperature and humidity is uniform in horizontal and vertical planes. an extensive body of air within which the temperature and humidity in horizontal planes are practically uniform. a body of air with a volume of not more than thousand cubic kilometres.

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12-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

050 4022 Thermodynamics

absolutely stable conditionally stable absolutely unstable conditionally unstable

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13-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

050 1

conditionally unstable conditionally stable absolutely stable absolutely unstable

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14-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?

050 2252 The Atmosphere

+15°C -10°C -15°C +5°C

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15-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?

050 2251 The Atmosphere

-15°C -30°C -45°C -60°C

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16-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?

050 1209 Thermodynamics

It must decrease by 5°C. It must decrease to +6°C. It must decrease to +7°C. It must decrease to +5°C.

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17-The process of change of state from a gas to a liquid is known as:

050 1

condensation in which latent heat is absorbed. condensation in which latent heat is released. evaporation in which latent heat is absorbed. evaporation in which latent heat is released.

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18-The process of change of state from a liquid to a gas is known as:

050 1

condensation in which latent heat is released. condensation in which latent heat is absorbed. evaporation in which latent heat is released. evaporation in which latent heat is absorbed.

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19-A layer in which the temperature increases with height is

050 4166 Thermodynamics

absolutely unstable neutral conditionally unstable absolutely stable

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20-The height and the temperature of the tropopause are respectively in the order of

050 3723 The Atmosphere

16 km and -40°C over the poles 8 km and - 75°C over the poles 8 km and -40°C over the equator 16 km and -75°C over the equator

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21-In which air mass are extremely low temperatures encountered?

050 13679 Uncategorized Wind

Continental tropical air. Continental polar air. Maritime arctic air. Maritime polar air.

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22-In which air mass are extremely low temperatures encountered?

050 1256 Wind Uncategorized

Maritime arctic air. Continental polar air. Maritime polar air. Continental tropical air.

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23-The Variation of Air Density with Temperature:

050 1

The lower the temperature of air, the lower is its density. The lower the temperature of air, the greater is its density. The higher the air temperature, the greater is its density. The higher the temperature of air, the greater is its density.

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24-You are flying over the sea at FL 250 and measure an outside temperature of -50°C. The pressure at sea level is 1023 hPa. What is your approximate true altitude calculated using normal vertical change in temperature with increase in height?

050 12823 Uncategorized Wind

23230 FT/AMSL. 26230 FT/AMSL. 23770 FT/AMSL. 26770 FT/AMSL.

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25-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?

050 13640 Uncategorized Wind

4865 FT 4325 FT 3515 FT 4190 FT

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26-After passing at right angles through a very active cold front in the direction towards the cold air, what will you encounter at FL 50, in the northern hemisphere immediately after a marked change in temperature?

050 1278 Air Masses and Fronts

An increase in tailwind. A decrease in tailwind. A veering in the wind direction. A backing in the wind direction.

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27-A layer in which the temperature remains constant with height is

050 4165 Thermodynamics

neutral conditionally unstable absolutely stable unstable

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28-A layer is absolutely unstable if the temperature decrease with height is

050 4164 Thermodynamics

less than 0.65°C per 100m more than 1°C per 100m 0.65°C per 100m between 1°C per 100m and 0.65°C per 100m

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29-An air mass is stable when

050 4149 Wind Uncategorized

the lapse rate is 1°C per 100 m temperature in a given area drops off very rapidly with height pressure is constant lifted air returns to its original level

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30-An air mass is unstable when

050 4148 Uncategorized Wind

temperature increases with height pressure shows a marked variation over a given horizontal area temperature and humidity are not constant an ascending parcel of air continues to rise to a considerable height.

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31-An inversion is a layer of air in which the temperature

050 3724 The Atmosphere

decreases with height more than 1°C/100m remains constant with height increases with height decreases with height less than 1°C/100m

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32-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?

050 15440 The Atmosphere

4865 ft 4190 ft 3515 ft 4325 ft

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33-An unstable air mass will normally be characterised by

050 10866 Air Masses and Fronts

stratiform cloud continuous light rain from medium level layer cloud poor visibility due to haze at the lower levels cumuliform cloud and good visibility except in precipitation

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34-An air mass is called stable when

050 3730 Wind Uncategorized

the environmental lapse rate is high, with little vertical motion of air currents the pressure in a given area is constant the temperature in a given air mass decreases rapidly with height the vertical motion of rising air tends to become weaker and disappears

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35-The wind which results from air cooling on the side of a valley is known as:

050 1

A valley wind An antitrptic wind An anabatic wind A katabatic wind

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36-An isothermal layer is a layer of air in which the temperature

050 3725 The Atmosphere

increases with height at a constant rate decreases with height at a constant rate increases with height remains constant with height

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37-At FL 180, the air temperature is -35°C.The air density at this level is:

050 13643 The Atmosphere

Unable to be determined without knowing the QNH. Less than the density of the ISA at FL 180. Equal to the density of the ISA at FL 180. Greater than the density of the ISA at FL 180.

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38-At FL 180, the air temperature is -35°C.The air density at this level is:

050 130 The Atmosphere

Equal to the density of the ISA at FL 180. Unable to be determined without knowing the QNH. Less than the density of the ISA at FL 180. Greater than the density of the ISA at FL 180.

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39-At FL 180, the air temperature is -35°C. The air density at this level is:

050 1

Greater than the density of the ISA atmosphere at FL 180. Equal to the density of the ISA atmosphere at FL 180. Unable to be determined without knowing the QNH. Less than the density of the ISA atmosphere at FL 180.

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40-In the ICAO Standard Atmosphere the decrease in temperature with height below 11 km is

050 3731 The Atmosphere

0.6°C per 100m 1°C per 100m 0.5°C per 100m 0.65°C per 100m

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41-What change in temperature will occur at point A during the next hour?

050 15566 Air Masses and Fronts

A drop in temperature A rise in temperature Approximately constant temperature Irregular fluctuations

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42-What change in temperature will occur at point B during the next hour?

050 15532 Air Masses and Fronts

A drop in temperature Irregular fluctuations A rise in temperature Approximately constant temperature

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43-Temperature decreases with altitude in standard atmosphere. Regarding this change in temperature, density should increase with altitude but it decreases. What is the reason?

050 1

The increase in pressure with altitude decreases the density. The temperature has no effect on air density. The decrease in pressure being more dominant than the decrease in temperature, causes the density to decrease. Scientist continue their research on this subject

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44-The air mass in the warm sector of a polar front is:

050 12836 Uncategorized Wind

equatorial air. polar air. tropical air. arctic air.

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45-Which of the following processes will increase the stability of an air mass?

050 12794 Uncategorized Wind

Warming of the air mass from below. Cooling by the underlying surface. Advection of colder air aloft. Addition of water vapour in the lower layer.

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46-The air mass affecting position "R" is most likely to be

050 13620

Continental tropical. Maritime tropical. Maritime polar. Continental polar.

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47-The air mass affecting position "A" is most likely to be

050 13614 Wind Uncategorized

Maritime polar. Continental tropical. Maritime tropical. Continental polar.

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48-The air mass affecting position "P" is most likely to be

050 13621 Air Masses and Fronts

Continental polar. Maritime tropical. Maritime polar. Continental tropical.

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49-The air mass affecting position "C" is most likely to be

050 13623 Uncategorized Wind

Continental polar. Maritime tropical. Maritime polar. Continental tropical.

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50-The air mass affecting position "S" is most likely to be

050 13632 Meteorological Information

Maritime tropical and stable. Continental tropical and unstable. Maritime polar and stable. Maritime polar and unstable.

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51-The air mass at position "X" is most likely to be

050 13567 Air Masses and Fronts

Continental tropical. Maritime tropical. Continental polar. Maritime polar.

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52-Which of the following processes will increase the stability of an air mass?

050 15594 Wind Uncategorized

Cooling by the underlying surface. Advection of colder air aloft. Warming of the air mass from below. Addition of water vapour in the lower layer.

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53-An air mass acquires its basic properties

050 13661 Air Masses and Fronts

in the westerlies of the mid-latitudes by stagnation of the air for a long period of time over areas having particular characteristics by the influence of jet streams by widespread thunderstorms

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54-The relative humidity of a sample air mass is 50%. How is the relative humidity of this air mass influenced by changes of the amount of water vapour in it?

050 1204 Thermodynamics

It increases with increasing water vapour. It is only influenced by temperature. It is not influenced by changing water vapour. It decreases with increasing water vapour.

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55-The decrease in temperature, per 100 metres, in an unsaturated rising parcel of air is

050 4132 Thermodynamics

1°C 0.5°C 0.65°C 2°C

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56-A strong, dry and warm downslope wind, produced by prior enforced ascent of air over hills or mountains is known as a

050 4081 Climatology

Scirocco Mistral Bora Foehn

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57-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?

050 1197 The Atmosphere

5°C colder than ISA. 5°C warmer than ISA. 10°C colder than ISA. 10°C warmer than ISA.

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58-If the surface temperature is 15°C , then the temperature at 10000 FT in a current of ascending unsaturated air is:

050 4141 Thermodynamics

5°C -5°C -15°C 0°C

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59-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

050 1

10°C colder than ISA. 10°C warmer than ISA. 5°C colder than ISA. 5°C warmer than ISA.

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60-Between mean sea level and a height of 20 km, the lowest temperature in the ICAO Standard Atmosphere (ISA) is:

050 10870 The Atmosphere

-44.7°C -56.5°C -100°C -273°C

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61-Which of the following statements is true of the dew point of an air mass?

050 10968 Air Masses and Fronts

It can be used together with the air pressure to estimate the air mass's relative humidity It can be higher than the temperature of the air mass It can be used to estimate the air mass's relative humidity even if the air temperature is unknown It can only be equal to, or lower, than the temperature of the air mass

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62-Which type of air mass never occurs over central Europe ?

050 12863 Air Masses and Fronts

Equatorial air Tropical air Polar air Arctic air

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63-The air mass type indicated by arrow number 4 is designated

050 13593 Air Masses and Fronts

Maritime polar. Maritime tropical. Continental tropical. Continental polar.

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64-Which of the following situations will most likely lead to a stable air mass?

050 15777 Thermodynamics

Widespread convection. Cold air at higher levels and advection of warm air at lower levels. Decreasing wind and developing showers. Subsidence and/or cooling from below.

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65-When a mass of unsaturated air descends, what effect will it have on relative humidity?

050 1208 Thermodynamics

It remains constant. It decreases. It increases up to 100%, then remains stable. It increases.

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66-Which of the following statements is true of the dew point of an air mass?

050 2541 Air Masses and Fronts

It can only be equal to, or lower, than the temperature of the air mass It can be used to estimate the air mass's relative humidity even if the air temperature is unknown It can be higher than the temperature of the air mass It can be used together with the air pressure to estimate the air mass's relative humidity

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67-An unstable air mass when forced to rise due to orographic lifting will produce:

050 1

Lenticular cloud. None, as the air will subside and warm adiabatically after the summit is passed. Cloud of extensive vertical development. Thick stratiform cloud, probably nimbostratus.

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68-In case of fronts, what cloud formation is most likely to occur at low levels when a warm air mass overrides a cold air mass?

050 1266 Air Masses and Fronts

Altostratus. Cumulonimbus. Cumulus. Nimbostratus.

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69-While mountain flying on a cold winter day, under fair weather conditions (QNH1013 hPa), you circle a mountain of known height at peak elevation. Comparing to the elevation of the mountain, the aneroid altimeter of your aircraft will therefore indicate... .

050 1

peak elevation cannot be determined a lower altitude a higher altitude

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70-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?

050 63 Thermodynamics

Higher than the starting temperature. Lower than the starting temperature. It depends upon the QFE. The same as the starting temperature.

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71-At which pressure and temperature conditions may you safely assume that the minimum usable flight level at least lies at the same height, as the minimum safe altitude?

050 13635 The Atmosphere

In a very cold area with a QNH of 1015 hPa At a temperature less than or equal to that of the ISA and where the QNH is less than 1013.25 hPa In a cold low pressure region At a temperature greater than or equal to that of the ISA and where the QNH is greater than or equal to 1013.25 hPa

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72-At which pressure and temperature conditions may you safely assume that the minimum usable flight level at least lies at the same height, as the minimum safe altitude?

050 1579 The Atmosphere

At a temperature greater than or equal to that of the ISA and where the QNH is greater than or equal to 1013.25 hPa In a very cold area with a QNH of 1015 hPa At a temperature less than or equal to that of the ISA and where the QNH is less than 1013.25 hPa In a cold low pressure region

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73-An aircraft is flying from south to north, above the polar front jet stream, at FL 400 in the southern hemisphere. What change, if any, in temperature will be experienced ?

050 1566 Wind

It decreases and then increases. It stays the same. It increases. It decreases.

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74-A parcel of unsaturated air is forced to rise through an isothermal layer. So long as it remains unsaturated, the temperature of the parcel

050 10847 Air Masses and Fronts

decreases 0.65°C per 100 m remains constant becomes equal to the temperature of the isothermal layer decreases 1°C per 100 m

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75-The QNH at an airfield located at mean sea level is 1022 hPa. The air temperature is not available. What is the QFF?

050 2244 The Atmosphere

It is not possible to give a definitive answer Less than 1022 hPa 1022 hPa More than 1022 hPa

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76-The QNH at an airfield located 200 metres above sea level is 1022 hPa. The air temperature is not available. What is the QFF?

050 2243 The Atmosphere

Less than 1022 hPa 1022 hPa It is not possible to give a definitive answer More than 1022 hPa

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77-The decrease in temperature, per 100 metres, in a saturated rising parcel of air at lower level of the atmosphere is approximately

050 4133 Thermodynamics

1.5°C 0.6°C 0.35°C 1°C

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78-An air temperature of -55°C at the 200 hPa level over central Europe in summer is

050 2504 The Atmosphere

High Within +/-5°C of ISA Very high Low

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79-An air temperature of -30°C at the 300 hPa level over central Europe in summer is

050 2503 The Atmosphere

High Very low Within +/-5°C of ISA Low

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80-An air temperature of -15°C at the 700 hPa level over central Europe in summer is

050 2502 The Atmosphere

High Low 20°C below standard Within +/-5°C of ISA

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81-You are at FL120 with an outside air temperature is -2°C. Where would you find the freezing level?

050 1

FL100 FL110 FL090 FL140

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82-The decrease in temperature, per 100 metres, in a saturated rising parcel of air at lower level of the atmosphere is approximately

050 1

0.6°C 1.5°C 0.35°C 1°C

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83-A moist, stable layer of air is forced to rise against a mountain range and the stability does not change. Which of the following phenomena may develop?

050 4049 Flight Hazards

Areas of severe turbulence Showers and thunderstorms Inversions Stratified clouds

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84-After a prolonged VMC descent in very cold air, you penetrate a humid air mass. What type of icing will you encounter?

050 10854 Flight Hazards

Smooth icing Rime ice Hoar frost Clear ice

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85-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 ?

050 66 The Atmosphere

6000 FT. 5760 FT. 6240 FT. 5900 FT.

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86-What winds and air mass characteristics are mainly associated with the winter monsoon in the monsoon regions of the Indian sub-continent?

050 12835 Wind Uncategorized

North-westerly winds bringing dry and hazy air. South-easterly winds carrying warm and humid air. North-easterly winds bringing dry and hazy air. South-westerly winds carrying warm and humid air.

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87-What type of weather can usually be expected in a polar maritime air mass over central Europe in the daytime during summer?

050 12818 Wind Uncategorized

Drizzle and low stratus. Continuous rain and poor visibility. Sky clear. Showers and good visibility.

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88-Which of the following phenomena can provide the initial lifting leading to air mass thunderstorms?

050 10973 Flight Hazards

Mountain waves Low level wind shear Advection of cold air over a warm sea Advection of warm air over a cold sea

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89-What is the name of the wind or air mass which gives to the main part of India its greatest proportion of precipitation?

050 4262 Climatology

South-east trade wind. Winter monsoon. South-west monsoon. Indian, maritime tropical air mass.

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90-What type of weather can usually be expected in a polar maritime air mass over Central Europe in the daytime during summer?

050 15786 Air Masses and Fronts

Continuous rain and poor visibility. Sky clear. Showers and good visibility. Drizzle and low stratus.

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91-An air mass which originates over the North Atlantic between 50 and 70 degrees north and is moving in over Scandinavia is called

050 15785 Air Masses and Fronts

continental polar air. maritime arctic air. continental arctic air. maritime polar air.

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92-A conditionally unstable air mass is forced to ascend a mountain slope. What type of clouds can be expected?

050 16708 Flight Hazards

Stratiform clouds with a temperature inversion. Clouds with considerable vertical development and associated turbulence. Stratiform clouds with considerable turbulence. Layer-like clouds with little vertical development.

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93-The air mass type advected from a direction indicated by arrow number 6 is designated

050 16480 Air Masses and Fronts

continental polar maritime arctic maritime polar continental arctic

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94-During the winter, the air mass type advected from a direction indicated by arrow number 1 is designated

050 16481 Air Masses and Fronts

continental polar continental arctic maritime arctic maritime polar

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95-An unstable air mass is forced to ascend a mountain slope. What type of clouds can be expected?

050 13666 Wind Uncategorized

Stratiform clouds with a temperature inversion. Clouds with considerable vertical development and associated turbulence. Layer-like clouds with little vertical development. Stratiform clouds with considerable turbulence.

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96-What process in an air mass leads to the creation of wide spread NS and AS cloud coverage?

050 1586 Clouds and Fog

Convection process Sinking Radiation Lifting

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97-What winds and air mass characteristics are mainly associated with the winter monsoon in the monsoon regions of the Indian sub-continent?

050 236 Uncategorized Wind

South-easterly winds carrying warm and humid air. North-easterly winds bringing dry and hazy air. North-westerly winds bringing dry and hazy air. South-westerly winds carrying warm and humid air.

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98-Which cross-section of air mass and cloud presentation is applicable to the straight line A-B?

050 1366 Air Masses and Fronts

4 2 3 1

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99-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?

050 12825 Uncategorized Wind

15100 ft 16920 ft 15620 ft 16360 ft

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100-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?

050 12824 Wind Uncategorized

18290 ft 21770 ft 19310 ft 20630 ft

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1-The actual change of the temperature in the air mass with height is known as:

2-How does relative humidity and the dewpoint in an unsaturated air mass change with varying temperature?

3-In still air the temperature decreases at an average of 1.2°C per 100 m increase in altitude. This temperature change is called:

4-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:

5-A given mass of air is saturated with water vapour (no condensed water). If temperature increases

6-If a saturated air mass descends down a slope its temperature increases at

7-How, if at all, is the relative humidity of an unsaturated air mass influenced by temperature changes?

8-The pressure change with height of the atmosphere:

9-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:

10-What are the typical differences with regard to the temperature and humidity between an air mass with its origin in the Azores and an air mass with its origin over northern Russia ?

11-An air mass is:

12-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

13-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

14-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?

15-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?

16-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?

17-The process of change of state from a gas to a liquid is known as:

18-The process of change of state from a liquid to a gas is known as:

19-A layer in which the temperature increases with height is

20-The height and the temperature of the tropopause are respectively in the order of

21-In which air mass are extremely low temperatures encountered?

22-In which air mass are extremely low temperatures encountered?

23-The Variation of Air Density with Temperature:

24-You are flying over the sea at FL 250 and measure an outside temperature of -50°C. The pressure at sea level is 1023 hPa. What is your approximate true altitude calculated using normal vertical change in temperature with increase in height?

25-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?

26-After passing at right angles through a very active cold front in the direction towards the cold air, what will you encounter at FL 50, in the northern hemisphere immediately after a marked change in temperature?

27-A layer in which the temperature remains constant with height is

28-A layer is absolutely unstable if the temperature decrease with height is

29-An air mass is stable when

30-An air mass is unstable when

31-An inversion is a layer of air in which the temperature

32-Given:Altimeter setting: 1013.2 hPaAltimeter reading: 5000 ftOutside air temperature at 5000 ft: +5°CQFE: 958 hPaQNH: 983 hPaWhat is the true height of the aircraft above the aerodrome?

33-An unstable air mass will normally be characterised by

34-An air mass is called stable when

35-The wind which results from air cooling on the side of a valley is known as:

36-An isothermal layer is a layer of air in which the temperature

37-At FL 180, the air temperature is -35°C.The air density at this level is:

38-At FL 180, the air temperature is -35°C.The air density at this level is:

39-At FL 180, the air temperature is -35°C. The air density at this level is:

40-In the ICAO Standard Atmosphere the decrease in temperature with height below 11 km is

41-What change in temperature will occur at point A during the next hour?

42-What change in temperature will occur at point B during the next hour?

43-Temperature decreases with altitude in standard atmosphere. Regarding this change in temperature, density should increase with altitude but it decreases. What is the reason?

44-The air mass in the warm sector of a polar front is:

45-Which of the following processes will increase the stability of an air mass?

46-The air mass affecting position "R" is most likely to be

47-The air mass affecting position "A" is most likely to be

48-The air mass affecting position "P" is most likely to be

49-The air mass affecting position "C" is most likely to be

50-The air mass affecting position "S" is most likely to be

51-The air mass at position "X" is most likely to be

52-Which of the following processes will increase the stability of an air mass?

53-An air mass acquires its basic properties

54-The relative humidity of a sample air mass is 50%. How is the relative humidity of this air mass influenced by changes of the amount of water vapour in it?

55-The decrease in temperature, per 100 metres, in an unsaturated rising parcel of air is

56-A strong, dry and warm downslope wind, produced by prior enforced ascent of air over hills or mountains is known as a

57-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?

58-If the surface temperature is 15°C , then the temperature at 10000 FT in a current of ascending unsaturated air is:

59-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

60-Between mean sea level and a height of 20 km, the lowest temperature in the ICAO Standard Atmosphere (ISA) is:

61-Which of the following statements is true of the dew point of an air mass?

62-Which type of air mass never occurs over central Europe ?

63-The air mass type indicated by arrow number 4 is designated

64-Which of the following situations will most likely lead to a stable air mass?

65-When a mass of unsaturated air descends, what effect will it have on relative humidity?

66-Which of the following statements is true of the dew point of an air mass?

67-An unstable air mass when forced to rise due to orographic lifting will produce:

68-In case of fronts, what cloud formation is most likely to occur at low levels when a warm air mass overrides a cold air mass?

69-While mountain flying on a cold winter day, under fair weather conditions (QNH1013 hPa), you circle a mountain of known height at peak elevation. Comparing to the elevation of the mountain, the aneroid altimeter of your aircraft will therefore indicate... .

70-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?

71-At which pressure and temperature conditions may you safely assume that the minimum usable flight level at least lies at the same height, as the minimum safe altitude?

72-At which pressure and temperature conditions may you safely assume that the minimum usable flight level at least lies at the same height, as the minimum safe altitude?

73-An aircraft is flying from south to north, above the polar front jet stream, at FL 400 in the southern hemisphere. What change, if any, in temperature will be experienced ?

74-A parcel of unsaturated air is forced to rise through an isothermal layer. So long as it remains unsaturated, the temperature of the parcel

75-The QNH at an airfield located at mean sea level is 1022 hPa. The air temperature is not available. What is the QFF?

76-The QNH at an airfield located 200 metres above sea level is 1022 hPa. The air temperature is not available. What is the QFF?

77-The decrease in temperature, per 100 metres, in a saturated rising parcel of air at lower level of the atmosphere is approximately

78-An air temperature of -55°C at the 200 hPa level over central Europe in summer is

32-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?