Index - Atpl Campus

100 item has been found

1-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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2-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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3-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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4-The amount of water vapour which air can hold largely depends on:

050 13815 Uncategorized Wind

stability of air. air temperature. the dew point. relative humidity.

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5-By volume, what percentage of the air in the lower troposphere consists of water vapour?

050 15462 The Atmosphere

5-10 % 20-30 % 0-5 % 10-15 %

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6-The maximum amount of water vapour that the air can contain depends on the

050 4038 Thermodynamics

relative humidity dewpoint stability of the air air temperature

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7-The maximum amount of water vapour that the air can contain depends on the

050 1

dewpoint stability of the air air temperature relative humidity

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8-If there was no water vapour in the atmosphere, _____.

050 1

There would not be any turbulence. there would not be any clouds and precipitation. There would not be any jetstreams. There would not be any surface winds.

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9-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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10-The maximum vapour pressure over a flat supercooled water surface and the maximum vapour pressure over a flat ice surface of the same temperature are compared. The maximum vapour pressure is

050 10923 Thermodynamics

equal over both surfaces the same over both surfaces if the air pressure is the same smaller over the water surface greater over the water surface

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11-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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12-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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13-When water vapour condenses or water freezes

050 15965 Thermodynamics

heat is required in both cases heat is required and heat is released respectively heat is released in both cases heat is released and heat is required respectively

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14-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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15-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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16-What is the reason for decreasing in the density when the water vapor added to the given volume of air?

050 1

Water vapor molecules are bigger than the air molecules. Water vapor molecules are less than the air molecules. Water vapor molecules have less weight than the air molecules. Water vapor molecules have more weight the air molecules.

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17-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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18-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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19-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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20-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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21-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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22-For both saturated and unsaturated air instability will occur when the

050 10884 Thermodynamics

dry adiabatic lapse rate is less than saturated adiabatic lapse rate but greater than environmental lapse rate environmental lapse rate is greater than both dry adiabatic lapse rate and saturated adiabatic lapse rate environmental lapse rate is greater than saturated adiabatic lapse rate but less than dry adiabatic lapse rate environmental lapse rate is less than both dry adiabatic lapse rate and saturated adiabatic lapse rate

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23-A sample of moist but unsaturated air may become saturated by

050 4034 Thermodynamics

lowering the pressure, keeping temperature constant expanding it adiabatically compressing it adiabatically raising the temperature

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24-A moist but unsaturated parcel of air becomes saturated by

050 4033 Thermodynamics

lowering the parcel to a lower level moving the parcel to an area with higher pressure and equal temperature moving the parcel to an area with lower pressure and equal temperature lifting the parcel to a higher level

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25-A parcel of air is said to be saturated if it has a relative humidity of:

050 1

50% Greater than 80 % Greater than 90 % 100%

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26-When water evaporates into unsaturated air

050 4032 Thermodynamics

heat is released relative humidity is decreased heat is absorbed relative humidity is not changed

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27-In the lower levels of the atmosphere when the environmental lapse rate is greater than saturated adiabatic lapse rate but less than dry adiabatic lapse rate - the air mass is described as being

050 10899 Thermodynamics

absolutely unstable unstable conditionally unstable stable

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28-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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29-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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30-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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31-In meteorology the process by which water vapour is transformed directly into ice is known as

050 5033 Thermodynamics

sublimation supercooling radiation cooling supersaturation

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

050 4166 Thermodynamics

absolutely unstable neutral conditionally unstable absolutely stable

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33-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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34-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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35-Which of the processes listed below can cause air to become saturated?

050 1

Heating Evaporation. Melting Condensation.

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36-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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37-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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38-The rate of cooling of ascending saturated air is less than the rate of cooling of ascending unsaturated air because:

050 4140 Thermodynamics

water vapour doesn't cool as rapidly as dry air water vapour absorbs the incoming heat from the sun heat is released during the condensation process moist air is heavier than dry air

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39-When ...... in a parcel of air, relative humidity increases.

050 1

temperature increases density increases water vapor added reduced humidity

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40-What is true for the water vapour distribution in the layer between the surface and the 500 hPa pressure surface in the tradewind belt?

050 12851 Thermodynamics

The lower part is relatively moist and the upper part is relatively dry. The whole layer is relatively moist. The lower part is relatively dry and the upper part is relatively moist. The whole layer is relatively dry.

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41-Which layer of the atmosphere contains more than 90 per cent of all water vapour?

050 2497 The Atmosphere

Lower stratosphere Ozone layer Upper stratosphere Troposphere

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42-Clouds will mainly consist of supercooled water droplets when the temperature is:

050 13637 Clouds and Fog

below -40° C. between -5° C and -30° C. between -30° C and -40° C. between 0° C and -15° C.

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43-Clouds will mainly consist of supercooled water droplets when the temperature is:

050 15725 Clouds and Fog

below -40° C. between -5° C and -30° C. between 0° C and -15° C. between -30° C and -40° C.

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44-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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45-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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46-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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47-As a parcel of air warms, its ability to hold water vapor:

050 1

Increases Remains unaltered Decreases Depends, whether the parcel is rising or not

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48-The amount of water vapor which air can hold largely depends on:

050 1

Stability of air. Dew point. Relative humidity. Air temperature.

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49-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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50-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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51-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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52-Relative humidity at a given temperature is the relation between

050 5538 Thermodynamics

dew point and air temperature water vapour weight and humid air volume actual water vapour content and saturated water vapour content water vapour weight and dry air weight

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53-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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54-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?

050 2049 Flight Hazards

Yes, but only between 3000 and 4000 FT/AGL. No, absolutely no icing will occur. Yes, between ground level and 3000 FT/AGL. No, flights clear of cloud experience no icing.

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55-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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56-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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57-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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58-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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59-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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60-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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61-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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62-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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63-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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64-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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65-Consider a parcel of air being forced upwards in the atmosphere. The lapse rate of the surrounding air is less than the saturated adiabatic lapse rate. After the initial force is no longer effective, the parcel of air

050 15075 Thermodynamics

will tend to remain at the new altitude. will tend to descend to its original altitude. will become conditionally unstable. will tend to ascend further.

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66-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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67-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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68-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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69-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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70-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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71-The temperature remains constant through a given depth of atmosphere, it is described as

050 1

advection the Environmental Lapse Rate being isothermal, temperature inversion

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72-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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73-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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74-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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75-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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76-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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77-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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78-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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79-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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80-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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81-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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82-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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83-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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84-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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85-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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86-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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87-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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88-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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89-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:

050 10930 The Atmosphere

stable unstable absolutely unstable conditionally unstable

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90-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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91-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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92-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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93-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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94-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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95-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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96-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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97-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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98-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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99-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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100-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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Notification

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

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

3-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?

4-The amount of water vapour which air can hold largely depends on:

5-By volume, what percentage of the air in the lower troposphere consists of water vapour?

6-The maximum amount of water vapour that the air can contain depends on the

7-The maximum amount of water vapour that the air can contain depends on the

8-If there was no water vapour in the atmosphere, _____.

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

10-The maximum vapour pressure over a flat supercooled water surface and the maximum vapour pressure over a flat ice surface of the same temperature are compared. The maximum vapour pressure is

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

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

13-When water vapour condenses or water freezes

14-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:

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

16-What is the reason for decreasing in the density when the water vapor added to the given volume of air?

17-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 ?

18-An air mass is:

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

20-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?

21-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?

22-For both saturated and unsaturated air instability will occur when the

23-A sample of moist but unsaturated air may become saturated by

24-A moist but unsaturated parcel of air becomes saturated by

25-A parcel of air is said to be saturated if it has a relative humidity of:

26-When water evaporates into unsaturated air

27-In the lower levels of the atmosphere when the environmental lapse rate is greater than saturated adiabatic lapse rate but less than dry adiabatic lapse rate - the air mass is described as being

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

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

30-The Variation of Air Density with Temperature:

31-In meteorology the process by which water vapour is transformed directly into ice is known as

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

33-An air mass is stable when

34-An air mass is unstable when

35-Which of the processes listed below can cause air to become saturated?

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

37-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?

38-The rate of cooling of ascending saturated air is less than the rate of cooling of ascending unsaturated air because:

39-When ...... in a parcel of air, relative humidity increases.

40-What is true for the water vapour distribution in the layer between the surface and the 500 hPa pressure surface in the tradewind belt?

41-Which layer of the atmosphere contains more than 90 per cent of all water vapour?

42-Clouds will mainly consist of supercooled water droplets when the temperature is:

43-Clouds will mainly consist of supercooled water droplets when the temperature is:

44-An unstable air mass will normally be characterised by

45-An air mass is called stable when

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

47-As a parcel of air warms, its ability to hold water vapor:

48-The amount of water vapor which air can hold largely depends on:

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

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

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

52-Relative humidity at a given temperature is the relation between

53-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?

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

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

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

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

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

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

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

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

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

64-An air mass acquires its basic properties

65-Consider a parcel of air being forced upwards in the atmosphere. The lapse rate of the surrounding air is less than the saturated adiabatic lapse rate. After the initial force is no longer effective, the parcel of air

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

67-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?

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

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

70-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

71-The temperature remains constant through a given depth of atmosphere, it is described as

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

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

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

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

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

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

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

79-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?

53-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?