A layer of stratus is most likely to be dispersed by ?
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After a clear night cumuliform clouds are formed in the morning Why can the base of these clouds become higher during the day ?
Air masses which are being cooled from below are often characterized by ?
An inversion An absolutely stable layer. 
An unstable air mass forced to ascend a mountain slope what type of clouds can be expected Clouds with considerable vertical development associated turbulence. unstable air = cumulus stable air = stratus this question has been seen at exam with this wording «a conditionally unstable air mass forced to ascend a mountain slope what type of clouds can be expected?» right answer remains unchanged. 
8/8 stratus base 200 ft/agl observed at sunrise at an aerodrome in north of francethe qnh 1028 hpa and there a variable wind of 3 kt what change in these clouds likely at 1200 utc in summer and winter Winter ovc base 5 ft/agl summer sct base 3 ft/agl. winter limited heating during day will raise cloud base slightly summer more heating will raise cloud base dissipate some of cloud the relatively high pressure (1028 hpa) light winds indicate anticyclonic conditions with stable air. 
The dewpoint temperature Can be reached cooling air whilst keeping pressure constant. winter limited heating during day will raise cloud base slightly summer more heating will raise cloud base dissipate some of cloud the relatively high pressure (1028 hpa) light winds indicate anticyclonic conditions with stable air. Question 132-8
The amount of water vapour which air can hold largely depends on Can be reached cooling air whilst keeping pressure constant. the most commonly used measure of humidity relative humidity relative humidity can be simply defined as amount of water in air relative to saturation amount air can hold at a given temperature multiplied 100 air with a relative humidity of 50% contains a half of water vapor it could hold at a particular temperature concept of relative humidity we can say that amount of water vapour which air can hold largely depends on air temperature. Question 132-9
A given mass of air saturated with water vapour no condensed water if temperature increases The amount of water vapour remains constant. Revised ecqb03 july 2016. Question 132-10
Which of following changes of state known as freezing The amount of water vapour remains constant. Revised ecqb03 july 2016. Question 132-11
Consider a parcel of air which moved upwards in surrounding air an external force which one of following situations describes instability the parcel Tends to gain altitude after being released. Take parcels of air that are initially in equilibrium with their environment by equilibrium we mean that temperature (density) of air inside a stationary parcel the same as its environment now give a parcel of air a push upward (for a parcel in contact with ground an upward push the only choice possible but air parcels aloft may be given a push upward or downward to test their stability) if after a push upwards test parcel returns to its original position layer of atmosphere where test took place said to be stable the atmosphere unstable when if a parcel starting at equilibrium displaced slightly upward relative to its surrounding environment it finds itself warmer than its environment (at its new altitude) therefore continues to rise spontaneously away from its starting point. Question 132-12
In which of following changes of state latent heat absorbed Tends to gain altitude after being released. Easa 2014 latent heat absorbed when going from liquid to gas solid to liquid solid to gas latent heat released when going from gas to liquid liquid to solid gas to solid. Question 132-13
In which of following changes of state latent heat released Tends to gain altitude after being released. Easa 2014 latent heat absorbed when going from liquid to gas solid to liquid solid to gas latent heat released when going from gas to liquid liquid to solid gas to solid. Question 132-14
What foehn wind It an adiabatically heated wind blowing down a mountain side the temperature on lee side normally higher than on windward side of mountain at same level. Easa 2014 latent heat absorbed when going from liquid to gas solid to liquid solid to gas latent heat released when going from gas to liquid liquid to solid gas to solid. Question 132-15
What 'mixing ratio' The number of grammes of water vapour per kilogramme of dry air. Easa 2014 latent heat absorbed when going from liquid to gas solid to liquid solid to gas latent heat released when going from gas to liquid liquid to solid gas to solid. Question 132-16
A night in january has been cold and clear in forenoon of next day an airfield in imc due to fog which extends to a height of 700 ft a heavily laden aircraft departs and when breaking through top of fog experiences temporary bumpiness and a sudden decrease in climb rate mark answer that states most probable reason the altered aircraft performance The aircraft suffers reduced lift thrust due to a temperature inversion at top of fog. Easa 2014 latent heat absorbed when going from liquid to gas solid to liquid solid to gas latent heat released when going from gas to liquid liquid to solid gas to solid. Question 132-17
Which of following changes of state known as melting The aircraft suffers reduced lift thrust due to a temperature inversion at top of fog. Easa 2014 latent heat absorbed when going from liquid to gas solid to liquid solid to gas latent heat released when going from gas to liquid liquid to solid gas to solid. Question 132-18
In which of following changes of state latent heat absorbed The aircraft suffers reduced lift thrust due to a temperature inversion at top of fog. Easa 2014 latent heat absorbed when going from liquid to gas solid to liquid solid to gas latent heat released when going from gas to liquid liquid to solid gas to solid. Question 132-19
Which of following changes of state known as evaporation The aircraft suffers reduced lift thrust due to a temperature inversion at top of fog. Easa 2014 latent heat absorbed when going from liquid to gas solid to liquid solid to gas latent heat released when going from gas to liquid liquid to solid gas to solid. Question 132-20
Which of following changes of state known as condensation The aircraft suffers reduced lift thrust due to a temperature inversion at top of fog. Easa 2014 latent heat absorbed when going from liquid to gas solid to liquid solid to gas latent heat released when going from gas to liquid liquid to solid gas to solid. Question 132-21
Check correctness of following statements 1 the maximum water vapor pressure higher over ice than over water with same temperature 2 for unsaturated air dew point temperature lower than outside temperature incorrect 2 correct. when dew point lower than oat air unsaturated when dew point equal to oat air saturated. Question 132-22
In an isothermal layer state of atmosphere incorrect 2 correct. Easa 2014 an isothermal layer a layer of air in which temperature remains constant with height for example layer just above tropopause absolutely stable (from 12 km to 25 km temperature does not vary with height it an isothermal layer where we have absolute stability). Question 132-23
In which of following changes of state latent heat absorbed incorrect 2 correct. Easa 2014 latent heat absorbed when going from liquid to gas solid to liquid solid to gas latent heat released when going from gas to liquid liquid to solid gas to solid. Question 132-24
Given following information what the approximate relative humidity of air mass temperature 15° cdew point 10° c incorrect 2 correct. usually we need to know 'water pressure of water' since this data not given we can use this basic formula relative humidity = (dew point / temperature) x 100 relative humidity = (10 / 15) x 100 = 67% closest answer 75%. Question 132-25
As regards water which state change process delivers main part of energy in thunderstorms and hurricanes incorrect 2 correct. usually we need to know 'water pressure of water' since this data not given we can use this basic formula relative humidity = (dew point / temperature) x 100 relative humidity = (10 / 15) x 100 = 67% closest answer 75%. Question 132-26
Several physical processes contribute to atmospheric warming which of following contribute most Convection condensation. usually we need to know 'water pressure of water' since this data not given we can use this basic formula relative humidity = (dew point / temperature) x 100 relative humidity = (10 / 15) x 100 = 67% closest answer 75%. Question 132-27
What the mean temperature deviation from isa the frankfurt roma route 403 4°c colder than isa. usually we need to know 'water pressure of water' since this data not given we can use this basic formula relative humidity = (dew point / temperature) x 100 relative humidity = (10 / 15) x 100 = 67% closest answer 75%. Question 132-28
During a high altitude flight favourable contrail formation conditions are High humidity low temperatures presence of aerosols. usually we need to know 'water pressure of water' since this data not given we can use this basic formula relative humidity = (dew point / temperature) x 100 relative humidity = (10 / 15) x 100 = 67% closest answer 75%. Question 132-29
An inversion a layer of air in which temperature Increases with increasing altitude. usually we need to know 'water pressure of water' since this data not given we can use this basic formula relative humidity = (dew point / temperature) x 100 relative humidity = (10 / 15) x 100 = 67% closest answer 75%. Question 132-30
In which of these cloud types can icing be virtually ruled out Increases with increasing altitude. cirrus clouds are very high clouds they are composed of ice crystals cirrus clouds do not result in structural icing the reason that the moisture already frozen in form of ice crystals and it doesn't deposit on airframe as do super cooled water droplets which might exist in stratus or cumulus clouds . Question 132-31
The most likely reason radiation fog to dissipate or become low stratus Increasing surface wind speed. cirrus clouds are very high clouds they are composed of ice crystals cirrus clouds do not result in structural icing the reason that the moisture already frozen in form of ice crystals and it doesn't deposit on airframe as do super cooled water droplets which might exist in stratus or cumulus clouds . Question 132-32
What conditions are most likely to lead to formation of hill fog Humid stable air mass wind blowing towards hills. cirrus clouds are very high clouds they are composed of ice crystals cirrus clouds do not result in structural icing the reason that the moisture already frozen in form of ice crystals and it doesn't deposit on airframe as do super cooled water droplets which might exist in stratus or cumulus clouds . Question 132-33
Clouds fog or dew will always be formed when Water vapour condenses. a cloud a large collection of very tiny droplets of water or ice crystals fog dew are a collection of very tiny droplets of water condensation the process which water vapor in air changed into liquid water. Question 132-34
Which of following a cause of stratus forming over flat land Radiation during night from earth surface in moderate wind. a cloud a large collection of very tiny droplets of water or ice crystals fog dew are a collection of very tiny droplets of water condensation the process which water vapor in air changed into liquid water. Question 132-35
Which of following processes within a layer of air may lead to building of cu and cb clouds Radiation during night from earth surface in moderate wind. a cloud a large collection of very tiny droplets of water or ice crystals fog dew are a collection of very tiny droplets of water condensation the process which water vapor in air changed into liquid water. Question 132-36
What are characteristics of cumuliform clouds Large water droplets instability turbulence showers mainly clear ice. a cloud a large collection of very tiny droplets of water or ice crystals fog dew are a collection of very tiny droplets of water condensation the process which water vapor in air changed into liquid water. Question 132-37
Which of following clouds are classified as medium level clouds in temperate regions Large water droplets instability turbulence showers mainly clear ice. . Question 132-38
Which one of displayed cloud forms representative of altocumulus castellanus 253 Large water droplets instability turbulence showers mainly clear ice. . Question 132-39
What the main composition of clouds classified as 'high level cloud Large water droplets instability turbulence showers mainly clear ice. cirrus cirrocumulus cirrostratus clouds are very high clouds they are composed of ice crystals . Question 132-40
A plain in western europe with an average elevation of 500 m 1600 ft above sea level covered with a uniform ac layer of cloud during summer months at what height above ground the base of this cloud to be expected 7 5 ft above terrain. altocumulus clouds are found at a mid level between 6000 20000 feet there are 3 basic types of middle level clouds altocumulus altostratus nimbostratus.
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