Index - Atpl Campus

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1-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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2-A parcel of rising air stays unsaturated. Which of the following statements is correct?

050 1583 Thermodynamics

Relative humidity decreases, mixing ratio remains unchanged Relative humidity increases, temperature decreases Relative humidity and mixing ratio remain unchanged Mixing ratio increases, temperature decreases

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3-Relative humidity

050 1205 Wind Uncategorized

does not change when water vapour is added provided the temperature of the air remains constant. changes when water vapour is added, even though the temperature remains constant. is not affected when air is ascending or descending. is not affected by temperature changes of the air.

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4-On average, going from the equator to the north pole, the altitude of the tropopause

050 1783 The Atmosphere

increases and its temperature increases decreases and its temperature decreases increases and its temperature decreases decreases and its temperature increases

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5-Going from the equator to the north pole, the altitude of the tropopause

050 1

decreases and its temperature decreases increases and its temperature decreases increases and its temperature increases decreases and its temperature increases

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6-Which statement is true concerning the tropopause from the equator to the poles?

050 1

The tropopause increases, the tropopause temperature increases The tropopause increases, the tropopause temperature decreases The tropopause decreases, the tropopause temperature increases The tropopause decreases, the tropopause temperature decreases

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7-Which of the following circumstances most favours the development of orographic fog?

050 15586 Clouds and Fog

Clear nights High relative humidity Katabatic winds Absolutely unstable air

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8-The height of the lifting condensation level is determined by

050 4050 Thermodynamics

temperature at surface and air pressure wet adiabatic lapse rate and dewpoint at the surface wind and dewpoint at the surface temperature and dewpoint at the surface

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9-During the adiabatic processes, temperature ...

050 1

Doesn’t change always decreases increases or decreases always increases

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10-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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11-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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12-The radiosonde can directly measure:

050 13611 Meteorological Information

wind, atmospheric pressure, air temperature. humidity, wind, atmospheric pressure. atmospheric pressure, air temperature, humidity. air temperature, humidity, wind.

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13-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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14-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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15-After a clear night cumuliform clouds are formed in the morning. Why can the base of these clouds become higher during the day?

050 13658 Clouds and Fog

Because the difference between the temperature and the dewpoint temperature at the initial condensation level becomes smaller. The wind speed is increasing, because the cold air mass changes into a warm air mass. Because the surface temperature increases. Because the stability increases.

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16-An inversion is when:

050 1

there is no change of temperature with height. there is no horizontal gradient of temperature. there is a decrease of temperature as height increases, there is an increase of temperature as height increases,

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17-Assuming that an initial "trigger" force is present, the conditions most likely to result in the formation of thunderstorms are

050 10867 Flight Hazards

high relative humidity and instability throughout a deep layer high surface temperature, low dew point and high dry adiabatic lapse rate intense surface heating, anticyclonic pressure system and relatively high freezing level rapid orographic cooling of cloud containing ice crystals

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18-Which of the following circumstances most favours the development of frontal fog?

050 15598 Clouds and Fog

Nocturnal radiation Absolutely unstable air Increase of the relative humidity by evaporation of rain drops Advection of very cold air over much warmer sea

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19-What meteorological conditions most favor the formation of radiation fog?

050 1

High relative humidity, light wind and clear sky. High relative humidity, moderate wind and cloudy sky. Low relative humidity, cold air and a warm surface under clear sky. Low relative humidity, no wind and clear sky.

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20-Which of the following is correct regarding the wind speed in a jet stream in the northern hemisphere?

050 15081 Wind

With colder air ahead when looking downwind, the wind speed increases with height, while with the colder air behind the wind speed decreases with height. With colder air to the left when looking upwind, the wind speed increases with height, while with the colder air to the right the wind speed decreases with height. With colder air behind when looking downwind, the windspeed increases with height, while with the colder air ahead the windspeed decreases with height. With colder air to the left when looking downwind, the wind speed increases with height, while with the colder air to the right the wind speed decreases with height.

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21-Under what conditions would density be the minimum value at any given place?

050 1

Low altitude, low temperature and low humidity. Low altitude, high temperature and high humidity. High altitude, high temperature and low humidity. High altitude, high temperature and high humidity.

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22-The pressure of the atmosphere:

050 1

decreases at a decreasing rate as height increases decreases at an increasing rate as height increases decreases at a constant rate till Tropopause. decreases at a constant rate as height increases

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23-The Variation of Air Density with Altitude:

050 1

as altitude increases, air density stays constant altitude does not effect. as altitude increases, air density decreases as altitude increases, air density increases

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24-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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25-For an airfield located in the British Isles, the passage of a warm front will usually be indicated by

050 10883 Air Masses and Fronts

rapid improvement in visibility, pressure falling rapidly, wind veering and increasing rise in temperature, rapid rise in pressure, wind backs and becomes gusty a fall in temperature, rise in dew point temperature, wind backing and decreasing rise in temperature, rise in dew point temperature, wind veers and decreases

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26-When is the RVR reported at most airports?

050 238 Meteorological Information

When the visibility decreases below 1500 m. When the RVR decreases below 2000 m. When the RVR decreases below 2500 m. When the visibility decreases below 2000 m.

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27-In which conditions is fog reported?

050 1

When visibility decreases below 500 m When visibility decreases below 1000 m When visibility decreases below 5000 m When visibility decreases below 1500 m

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28-When is the RVR reported regarding ICAO standards?

050 1

When the RVR decreases below 800 m. When the meteorological visibility decreases below 800 m. When the meteorological visibility decreases below 1500 m. When the RVR decreases below 2000 m.

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29-Relative humidity:

050 1

changes when water is added, even if the temperature is the same. is not affected by temperature. does not change when water is added. is not affected by air expanding and contracting.

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30-Relative humidity

050 12840 Uncategorized Wind

is higher in warm air than in cool air increases if the air is cooled whilst maintaining the vapour pressure constant decreases if the air is cooled whilst maintaining the vapour pressure constant is higher in cool air than in warm air

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31-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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32-The ICAO Standard Atmosphere (ISA) assumes that temperature will reduce at the rate of

050 10921 The Atmosphere

2°C per 1000 FT up to 36090 FT and will then increase at 0,3°C per 1000 FT up to 65617 FT 1,98°C per 1000 FT up to 36090 FT and will then rise at 0,3°C per 1000 FT up to 65617 FT when it will remain constant 1,98°C per 1000 FT up to 36090 FT after which it remains constant to 65617 FT 2°C per 1000 FT up to 65617 FT after which it will remain constant to 104987 FT

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33-The ICAO Standard Atmosphere (ISA) assumes that temperature will reduce at the rate of

050 13730 The Atmosphere

2°C per 1000 FT up to 36090 FT and will then increase at 0,3°C per 1000 FT up to 65617 FT 1,98°C per 1000 FT up to 36090 FT after which it remains constant to 65617 FT 2°C per 1000 FT up to 65617 FT after which it will remain constant to 104987 FT 1,98°C per 1000 FT up to 36090 FT and will then rise at 0,3°C per 1000 FT up to 65617 FT when it will remain constant

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34-Which of the following sets of conditions are most favourable to the development of thunderstorms?

050 10964 Flight Hazards

Environmental lapse rate greater than saturated adiabatic lapse rate through a great vertical extent, high relative humidity and an initial lifting process Environmental lapse rate less than saturated adiabatic lapse rate with dew point below 0°C and considerable surface heating Environmental lapse rate less than dry adiabatic lapse rate with freezing level below the cloud base, high relative humidity and strong surface winds Extensive isothermal layer, ice particles and water droplets must exist just below the freezing level and orographic lifting

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35-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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36-An aircraft is flying through the polar front jet stream from south to north, beneath the core. How would the OAT change, in the northern hemisphere, during this portion of the flight?

050 1561 Wind

It remains constant. It first increases, then decreases. It decreases. It increases.

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37-How does temperature vary with increasing altitude in the ICAO standard atmosphere below the tropopause?

050 1104 The Atmosphere

Increases Decreases Remains constant At first it increases and higher up it decreases

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38-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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39-Whilst flying at FL 180 on the northern hemisphere an aircraft experiences right drift. What effect, if any, will this have on the aircraft's true altitude ?

050 1236 Wind

It remains constant. Without knowing the pressure change this question cannot be answered. It decreases It increases.

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40-An aircraft is flying at FL 180 in the northern hemisphere with a crosswind from the left. Which of the following is correct concerning its true altitude ?

050 4163 Wind Uncategorized

It decreases It remains constant Without knowing temperatures at FL 180 this question can not be answered. It increases

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41-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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42-According to ISA the temperature in the lower part of the stratosphere

050 2128 The Atmosphere

increases with altitude first increases with altitude but decreases at higher altitudes is constant with altitude decreases with altitude

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43-During a descent from 2000 FT above the surface to the surface (no frontal passage, northern hemisphere), the wind normally

050 4061 Wind

veers and decreases veers and increases backs and increases backs and decreases

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44-In mid-latitudes, the tops of Cumulus are often limited by

050 10895 Clouds and Fog

a radiation inversion the tropopause a layer of unstable air a temperature inversion

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45-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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46-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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47-Under what condition does pressure altitude have the same value as density altitude ?

050 132 Wind Uncategorized

When the altimeter setting is 1013.2 hPa. At sea level when the temperature is 0°C. At standard temperature. When the altimeter has no position error.

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48-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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49-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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50-Under which condition does pressure altitude have the same value as density altitude ?

050 1

When the altimeter setting is 1013,2 hPa. At standard temperature. When the altimeter has no position error. At sea level when the temperature is 0°C.

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51-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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52-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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53-What change in pressure, will occur at point B, during the next hour?

050 15564 Air Masses and Fronts

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

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54-The dry adiabatic lapse rate

050 3729 The Atmosphere

has a variable value is greater during the night than during the day is greater in summer than in winter has a constant fixed value

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55-In the lower layers of the atmosphere due to friction the wind changes direction towards the low pressure area because:

050 1099 Wind

turbulence is formed and pressure increases the pressure gradient increases turbulence is formed and pressure decreases wind speed decreases and therefore coriolis force decreases

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56-How does the height of the tropopause normally vary with latitude in the northern hemisphere ?

050 127 The Atmosphere

It increases from south to north. It remains constant throughout the year. It decreases from south to north. It remains constant from north to south.

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57-You depart from an airport with 5 knots of headwind. While passing 500 ft, the wind suddenly changes to 30 knots of tailwind. What would you most likely expect?

050 1

Climb rate decreases. Indicated Air Speed increases. Nothing would change. Climb rate increases.

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58-What is necessary for the development of a polar front jet stream?

050 13630 Wind

An unstable atmosphere up to great heights. Strong horizontal temperature gradients. Strong vertical temperature gradients. A uniform pressure pattern.

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59-Which of the following factors have the greatest effect on the formation of the various types of ice on an aircraft ?

050 4252 Flight Hazards

Relative humidity inside the cloud Aircraft speed and size of cloud droplets Aircraft speed and curvature of the airfoil Cloud temperature and droplet size

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60-A wide body takes off on a clear night in Dhahran, Saudi Arabia. Shortly after take off the aircraft's rate of climb drops to zero. This can be due to

050 4195 Flight Hazards

very pronounced downdrafts a very strong temperature inversion low relative humidity sand/dust in the engines

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61-Tropical revolving storms do not occur in the southeast Pacific and the south Atlantic mainly because

050 1991 Pressure Systems

the southeast trade winds cross over into the northern hemisphere. of the strong southeast wind. there is no coriolis force present. of the low water temperature.

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62-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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63-The dewpoint temperature

050 4029 Thermodynamics

is always lower than the air temperature can be equal to the air temperature can not be equal to the air temperature is always higher than the air temperature

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64-Relative humidity depends on

050 4030 Thermodynamics

moisture content and pressure of the air moisture content of the air only temperature of the air only moisture content and temperature of the air

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65-The dewpoint temperature

050 4031 Thermodynamics

can not be equal to the air temperature is always higher than the air temperature can be equal to the air temperature is always lower than the air temperature

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66-An inversion is

050 4169 Wind Uncategorized

a decrease of temperature with height a decrease of pressure with height an increase of temperature with height an increase of pressure with height

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67-An inversion is

050 4142 Wind Uncategorized

a decrease of temperature with height a decrease of pressure with height an increase of pressure with height an increase of temperature with height

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68-Supercooled droplets are always

050 4128 Thermodynamics

small and at a temperature below freezing large and at a temperature below freezing at a temperature below -60°C at a temperature below freezing

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69-When Air density will be lowest at the Earth's surface:

050 1

pressure is low and temperature is low pressure is high and temperature is low pressure is low and temperature is high pressure is high and temperature is high

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70-Which of the following combinations contain the greatest air density?

050 1

High pressure and low temperature. Low pressure and low temperature. Low pressure and high temperature. High pressure and high temperature.

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71-Tropopause pauses _______.

050 1

the temperature and the horizontal motion of air. the pressure. the stratus clouds. the temperature and the vertical motion of air.

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72-An inversion is characterized by:

050 1

The tendency to increase relative humidity with increasing altitude. Parts of the air mass at each level is warmer than surrounding air. Increasing temperature with increasing altitude. Constant temperature with increasing altitude

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73-Density at the surface will be low when:

050 1

pressure is low and temperature is high. pressure is low and temperature is low. pressure is high and temperature is high. pressure is high and temperature is low.

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74-As altitude increases in troposphere

050 1

temperature and pressure increase and density decreases. temperature decreases whilst pressure and density increase. temperature decreases and density increases. temperature, pressure and density decrease.

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75-Relative humidity depends on

050 1

moisture content of the air only temperature of the air only moisture content and pressure of the air moisture content and temperature of the air

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76-From summer to winter the average geographic position of the polar front jet stream over the North Atlantic moves

050 10886 Wind

towards the north and the speed increases towards the north and the speed decreases towards the south and the speed decreases towards the south and the speed increases

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77-Which of the following is correct regarding a warm anticyclone?

050 15666 Pressure Systems

It weakens with altitude. It remains the same strength up to the tropopause. Apart from a surface inversion, the temperature increases with increasing altitude. It increases in intensity with increasing altitude.

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78-During the winter months in mid-latitudes in the northern hemisphere, the polar front jet stream moves toward the

050 2173 Wind

north and speed increases south and speed decreases north and speed decreases south and speed increases

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79-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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80-When in the upper part of a layer warm air is advected the

050 4026 The Atmosphere

wind speed will always decrease with increasing height in the northern hemisphere stability increases in the layer wind will back with increasing height in the northern hemisphere stability decreases in the layer

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81-Daily variation of the surface temperature will:

050 1

Be at a minimum in calm conditions Be unaffected by a change of wind speed Decrease as wind speed increases Increase as the wind speed increases.

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82-You depart from an airport with 5 knots of tailwind. While passing 500 ft, the wind suddenly changes to 30 knots of headwind What would you most likely expect?

050 1

Nothing would change. Climb rate increases. Climb rate decreases. Indicated Air Speed decreases.

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83-Where would you expect polar front depressions?

050 1

When flying over ITCZ (Intertropical convergence zone) When flying over Europe When flying over tropopause When flying over Kenya

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84-On an upper wind and temperature chart:

050 12844 Meteorological Information

the height is constant all over the chart. the wind increases from south to north. the temperature is constant all over the chart. the pressure is constant all over the chart.

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85-On an upper wind and temperature chart:

050 14936 Meteorological Information

the wind increases from south to north. the height is constant all over the chart. the pressure is constant all over the chart. the temperature is constant all over the chart.

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86-Which units are used for the forecasted wind at higher levels?

050 4194 Wind

Direction in degrees relative to magnetic north and speed in km/h Direction in degrees relative to magnetic north and speed in knots Direction in degrees relative to grid north and speed in km/h Direction in degrees relative to true north and speed in knots

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87-How is the direction and speed of upper winds described in forecasts ?

050 239 Uncategorized Wind

The direction is relative to magnetic north and the speed is in knots. The direction is relative to true north and the speed is in miles per hour. The direction is relative to magnetic north and the speed is in miles per hour. The direction is relative to true north and the speed is in knots.

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88-Gust Front forms up to 20 NM. long and ....

050 1

relative to the movement direction on either side of the thunderstorm (CB). relative to the movement direction happens on any side of the thunderstorm (CB). relative to the movement direction in front of the thunderstorm (CB). relative to the movement direction on the back side of the thunderstorm (CB).

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89-Why do tropical revolving storms tend to develop mostly in the western parts of the tropical oceans?

050 12816 Uncategorized Wind

Because there is a maximum of humidity as a result of the trade winds long sea passage Because they are areas in which there is a strong progressive wind shear with increase of height Because the gulf formation of the coastlines triggers a strong rotary circulation Because there is a maximal temperature difference between land mass and sea

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90-Why do tropical revolving storms tend to develop mostly in the western parts of the tropical oceans?

050 5018 Wind Uncategorized

Because they are areas in which there is a strong progressive wind shear with increase of height Because the gulf formation of the coastlines triggers a strong rotary circulation Because there is a maximum of humidity as a result of the trade winds long sea passage Because there is a maximal temperature difference between land mass and sea

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91-Which of the following conditions would cause the altimeter to indicate a lower altitude than that actually flown ?

050 2169 The Atmosphere

Pressure altitude the same as indicated altitude. Atmospheric pressure lower than standard Air temperature lower than standard. Air temperature higher than standard

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92-Clear ice is formed when supercooled droplets are

050 4130 Flight Hazards

small and freeze rapidly large and at a temperature just below freezing of any size at temperatures below -35°C. small and at a temperature just below freezing

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93-An aircraft is flying over the sea at FL 120, with a true altitude of 12000 feet; local QNH is 1013 hPa. What assumption, if any, can be made about the air mass in which the aircraft is flying ?

050 2259 The Atmosphere

It is colder than ISA There is insufficient information to come to any conclusion Its average temperature is the same as ISA It is warmer than ISA

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94-The tropopause is a level at which

050 3717 The Atmosphere

pressure remains constant vertical currents are strongest water vapour content is greatest temperature ceases to fall with increasing height

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95-Adiabatic process is;

050 1

decrease in temperature in a parcel of air. increase in temperature in a parcel of air. formation of cloud in a parcel of air. change in temperature because of pressure change.

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96-What is a characteristic of the troposphere?

050 1

There is an overall decrease of temperature with an increase of altitude The average altitude of the top of the troposphere is about 8 kilometres There is an overall increase of temperature with an increase of altitude It contains all the moisture of the atmosphere

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97-What positions are connected by contour lines on a weather chart?

050 240 Meteorological Information

Positions with the same air density. Positions with the same height in a chart of constant pressure. Positions with the same wind velocity. Positions with the same thickness between two constant pressure levels.

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98-How does moderate turbulence affect an aircraft?

050 1227 Flight Hazards

Continued flight in this environment will result in structural damage. Large, abrupt changes in altitude or attitude occur but the aircraft may only be out of control momentarily. Changes in altitude or attitude occur but the aircraft remains in positive control at all times. Rapid and somewhat rhythmic bumpiness is experienced without appreciable changes in altitude or attitude.

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99-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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100-Cold air pools

050 10872 Uncategorized Wind

only occur in winter only occur at mid-latitudes can easily be recognized on synoptic surface charts are most evident in the temperature and wind fields of the upper levels

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

2-A parcel of rising air stays unsaturated. Which of the following statements is correct?

3-Relative humidity

4-On average, going from the equator to the north pole, the altitude of the tropopause

5-Going from the equator to the north pole, the altitude of the tropopause

6-Which statement is true concerning the tropopause from the equator to the poles?

7-Which of the following circumstances most favours the development of orographic fog?

8-The height of the lifting condensation level is determined by

9-During the adiabatic processes, temperature ...

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

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

12-The radiosonde can directly measure:

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

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

15-After a clear night cumuliform clouds are formed in the morning. Why can the base of these clouds become higher during the day?

16-An inversion is when:

17-Assuming that an initial "trigger" force is present, the conditions most likely to result in the formation of thunderstorms are

18-Which of the following circumstances most favours the development of frontal fog?

19-What meteorological conditions most favor the formation of radiation fog?

20-Which of the following is correct regarding the wind speed in a jet stream in the northern hemisphere?

21-Under what conditions would density be the minimum value at any given place?

22-The pressure of the atmosphere:

23-The Variation of Air Density with Altitude:

24-The pressure change with height of the atmosphere:

25-For an airfield located in the British Isles, the passage of a warm front will usually be indicated by

26-When is the RVR reported at most airports?

27-In which conditions is fog reported?

28-When is the RVR reported regarding ICAO standards?

29-Relative humidity:

30-Relative humidity

31-An air mass is:

32-The ICAO Standard Atmosphere (ISA) assumes that temperature will reduce at the rate of

33-The ICAO Standard Atmosphere (ISA) assumes that temperature will reduce at the rate of

34-Which of the following sets of conditions are most favourable to the development of thunderstorms?

35-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 ?

36-An aircraft is flying through the polar front jet stream from south to north, beneath the core. How would the OAT change, in the northern hemisphere, during this portion of the flight?

37-How does temperature vary with increasing altitude in the ICAO standard atmosphere below the tropopause?

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

39-Whilst flying at FL 180 on the northern hemisphere an aircraft experiences right drift. What effect, if any, will this have on the aircraft's true altitude ?

40-An aircraft is flying at FL 180 in the northern hemisphere with a crosswind from the left. Which of the following is correct concerning its true altitude ?

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

42-According to ISA the temperature in the lower part of the stratosphere

43-During a descent from 2000 FT above the surface to the surface (no frontal passage, northern hemisphere), the wind normally

44-In mid-latitudes, the tops of Cumulus are often limited by

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

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

47-Under what condition does pressure altitude have the same value as density altitude ?

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

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

50-Under which condition does pressure altitude have the same value as density altitude ?

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

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

53-What change in pressure, will occur at point B, during the next hour?

54-The dry adiabatic lapse rate

55-In the lower layers of the atmosphere due to friction the wind changes direction towards the low pressure area because:

56-How does the height of the tropopause normally vary with latitude in the northern hemisphere ?

57-You depart from an airport with 5 knots of headwind. While passing 500 ft, the wind suddenly changes to 30 knots of tailwind. What would you most likely expect?

58-What is necessary for the development of a polar front jet stream?

59-Which of the following factors have the greatest effect on the formation of the various types of ice on an aircraft ?

60-A wide body takes off on a clear night in Dhahran, Saudi Arabia. Shortly after take off the aircraft's rate of climb drops to zero. This can be due to

61-Tropical revolving storms do not occur in the southeast Pacific and the south Atlantic mainly because

62-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?

63-The dewpoint temperature

64-Relative humidity depends on

65-The dewpoint temperature

66-An inversion is

67-An inversion is

68-Supercooled droplets are always

69-When Air density will be lowest at the Earth's surface:

70-Which of the following combinations contain the greatest air density?

71-Tropopause pauses _______.

72-An inversion is characterized by:

73-Density at the surface will be low when:

74-As altitude increases in troposphere

75-Relative humidity depends on

76-From summer to winter the average geographic position of the polar front jet stream over the North Atlantic moves

77-Which of the following is correct regarding a warm anticyclone?

78-During the winter months in mid-latitudes in the northern hemisphere, the polar front jet stream moves toward the