Atmosphere Flashcards
Lowest layer of atmosphere is
》A)Troposphere
B)Tropopause
C)Stratosphere
Height of Tropopause at equator is
10-12 km
》16-18 km
12-14 km
Height of tropopause at poles is
12 to 14 km
12 to 13 km
》08 to 10 km
Higher the surface temperature ……….. would be the tropopause
》Higher
Lower
Same
Height of tropopause varies with………..
Is constant
varies with altitude
》varies with latitude
Above 8 km the lower temperatures are over…….
》(a) Equator
(b) Mid Latitudes
(c)Poles
Q7. Atmosphere is heated by ………
(a) Solar Radiation
》(b)Heat from earth surface
(c) From above
Q8. Tropos means……..
》(a) Turning
(b)Under current
(c) Convection
Q9. CO2 and H20 are also called..
》(a) Green House Gases
(b) Rare Earth Gases
Troposphere is generally…
(a) Stable
(b) Unstable
(c) Neutral
(a) Stable
》(b) Unstable
(c) Neutral
Stratosphere is..
(a) Unstable
(b) Neutral
》(c) Stable
Tropopause is discontinuous at about….
(a) 30°lat
》(b) 40°lat
(c) 80°lat
Most of atmospheric mass is contained in …
》(a) Troposphere
(b) Stratosphere
(c) Heterosphere
Stratosphere extends from Tropopause to …
》(a) 50 km
(b) 60 km
(c) 40 km
The middle atmosphere layer with temperature inversion and stability ………
(a) Troposphere
(b) Tropopause
》(c) Stratosphere
Mother of Pearl clouds occur in …
(a) Mesosphere
(b)Thermosphere
》(c)Stratosphere
The temperature in ISA at 17 km is………
》(a)-56.5°C
(b)-65.5°C
(c)-35.5°C
By weight, approximate ratio of O2to N2 in the atmosphere is. .
》(a) 1:3
(b) 1:4
(c) 1:5
Q19. By volume, the approximate ratio of O2 to N in the atmosphere is ..
(a) 1:3
》(b) 1:4
(c) 1:5
By volume, the proportion of CO2 in the atmosphere is ..
(a) 3%
(b) 0.3%
》(c) 0.03%
In ISA, the mean sea level temperature is…….
》(a) 15° C
(b) 10°C
(c) 25°C
Maximum concentration of ozone is at a height of …
(a) 10-15 km
》(b) 20-25 km
(c) 30-35 km
Additional oxygen is needed while flying above ……
(a) 5000 ft
(b) 7000 ft
》(c) 10,000 ft
CO2 and H:O keep the atmosphere ………
》(a) Warm
(b) Cold
(c) Have no effect
Noctilucent clouds occur in
(a) Themosphere
》(b) Mesosphere
(c) Stratosphere
Temperature at 2 km is 05°C what is ISA deviation. Hint: (Actual ISA)
(a)-05°C
(b)-02° C
》(c) 03°C
Pressure at MSL is 1002.25 hPa. Find the ISA deviation Hint: (Actual- ISA)
》(a)-11 hPa
(b) 10 hPa
(C) 12 hPa
In actual atmosphere temp. at 19 km is -60°C. Find the ISA deviation?
(a) 4.5°C
(b) 05.5° C
》(c)-03.5°C
Nacreous clouds occur in
(a) Thermosphere
(b) Mesosphere
》(c) Upper Stratosphere
The atmosphere up to 80 km has a nearly similar composition and is called the Homosphere.
Its uniform composition is due to
(a) Pressure
》(b) Gravitation of earth
(c) Mixing due to turbulence
Half of the atmospheric air mass is contained… below
》(a) 20,000 ft
(b) 15,000 ft
(c) 10,000 ft
In jet standard atmosphere the Lapse Rate is
》(a) 2°C/1000 ft
(b) 2°C/km
(C) 5°C/km
The rate of fall of temperatures with height, called
(a) Isothermal rate
(b) Inversion Rate
》(c) Lapse Rate
In actual atmosphere the lapse rate could
》(a) Assume any value
(b) fall up to 8 km.
(C) rise up to 50 km
Tropical Tropopause extends from the equator to Lat. 35-40°.0ver India it is at
(a) 20-21 km
(6) 14-15 km
》(C) 16-16.5 km
Lapse rate in the troposphere is produced by…….. and in the stratosphere by………
(a) Evaporation, condensation
》(b) Rising air, solar radiation
(c) Terrestrial radiation, solar radiation
(d) solar radiation, convection
Most of the water vapour in the atmosphere is confined up to
(a) stratosphere
》(b) 30,000 ft
(c)Mid troposphere
(d) lower troposphere
Negative lapse rate of temperature is
(a) Isothermal rate
(b) temperature rise with lowering height
》(C) Temperature rise with height
(d) temperature fall with height
In ICAO ISA the atmosphere is assumed to be isothermal
(a) in stratosphere
(b) 11 to 16 km
》(C) 11 to 20 km
(d) 11 to 32 km
One of the characteristics of our atmosphere is
(a) Poor conductor of heat and electricity
(b) Equator is warmer than poles above 10 km
(c) Lapse rate in the stratosphere is positive
(d) Density is constant above 8 km
》(a) Poor conductor of heat and electricity
(b) Equator is warmer than poles above 10 km
(c) Lapse rate in the stratosphere is positive
(d) Density is constant above 8 km
Heat transfer in the atmosphere is maximum due to
(a) convection
(b) radiation
(C) sensible heat
》(d) latent heat
The knowledge of the height of tropopause is important for a pilot because
(a) weather is mainly confined up to this level
(b) clouds rarely reach up to this height due to jetstreams
(c) stratosphere starts at this height where all solar radiation are absorbed
》(a) weather is mainly confined up to this level
(b) clouds rarely reach up to this height due to jetstreams
(c) stratosphere starts at this height where all solar radiation are absorbed
In ISA atmosphere the tropopause occurs at a height of
(a) 8 10 km
》(b) 11 km
(c) 16-18 km
Most of the transfer of heat in the atmosphere is due to
(a) Conduction and freezing
(b) convection and evaporation
(c) Condensation, sublimation and freezing
(d) sublimation and radiation
(a) Conduction and freezing
(b) convection and evaporation
》(C) Condensation, sublimation and freezing
(d) sublimation and radiation
There is reversal of temperature in the atmosphere at 8 km because
(a) Lapse rate at poles is always higher than at equator
(b) Lapse rate at equator is always higher than at poles
(c) Lapse rate at equator is the same as at poles even above the poles
》(d) Lapse rate reverses at poles and becomes negative
