Engineering Sciences
GATE XE Atmospheric Science PYQs
Build your understanding with focused practice from past exam papers.
Questions 91–100 of 123. Imported answers require independent review unless marked reviewed.
Question 9
Open questionXE-HMCQ1 markNeeds review
A numerical weather forecasting model follows sigma (σ) coordinate system in the vertical. At two locations A and B, the surface pressure is 1000 hPa and 500 hPa respectively. The values of pressure at A and B (in that order) for σ = 0.5 are:
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Open questionXE-HMCQ2 marksNeeds review
At a given temperature and pressure, equilibrium vapor pressure over the surface of a rain droplet compared to that over a flat surface of pure water is
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Open questionXE-HMCQ2 marksNeeds review
Velocity field in a geophysical flow is given by
where
are zonal, meridional and vertical components of velocity, and
and
refer to eastward and northward distance. Which among the following statements is NOT true for the flow at 45°N:Your answerChoose one option.
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Open questionXE-HNAT2 marksNeeds review
The distance between Mars and Earth is 0.52 times the distance between Sun and Earth. If the solar constant on Earth is 1370 W m
, then the solar constant on Mars is ________ W m
. (Round off to one decimal place.)Log in to check the answer
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Open questionXE-HNAT2 marksNeeds review
Ideal gas equation for dry air is expressed as
, where
is pressure,
is density,
is temperature and
is gas constant. If CO
concentration in Earth’s atmosphere quadruples due to fossil fuel burning, then the new gas constant is ________ J kg
K
. (Round off to two decimal places.)
Take the universal gas constant (
) = 8.314 J K
mole
, molecular weight of CO
= 44, and present value of
= 287 J kg
K
, present concentration of CO
= 500 mg kg
.Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 14
Open questionXE-HNAT2 marksNeeds review
On a calm evening under a clear sky, the lowest 20 m of the atmosphere is continuously losing energy at a rate of 10 W m
due to radiative cooling. Sensible and latent heat flux exchange with the ground is zero. If air temperature and dew point depression at 6 p.m. are 25°C and 8°C, respectively, the probability of fog formation at midnight is ________ %. (Round off to the nearest integer.)
Take
= 1005 J kg
K
, density of air = 1.15 kg m
.Log in to check the answer
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Open questionXE-HNAT2 marksNeeds review
The dynamical core of a general circulation model uses 256 spherical harmonic waves to cover the globe in east-west direction. If two grids of the model exactly resolve the shortest of those waves, then the grid spacing at the equator is ________ km. (Round off to one decimal place.)
Take radius of the earth (
) = 6400 km.Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 17
Open questionXE-HNAT2 marksNeeds review
A moist air parcel is lifted adiabatically to 800 hPa level. Initial temperature and pressure of the parcel are 300 K and 1010 hPa, and the partial pressure of water vapor is 10 hPa. The partial pressure of the water vapor at the new location is ________ hPa. (Round off to one decimal place.)
Take saturation vapor pressure of water at temperature
as
where
hPa,
K, gas constant (
) = 287 J kg
K
, and
= 1005 J kg
K
.Log in to check the answer
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Open questionXE-HNAT2 marksNeeds review
In steady state, global mean precipitation
is equal to global mean evaporation
from the surface of the earth. If
is 2.8 mm day
, then the global mean surface latent heat flux is ________ W m
. (Round off to the nearest integer.)
Take latent heat of evaporation of water as
J kg
.Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 1
Open questionXE-HMCQ1 markNeeds review
The most abundant gas in the atmosphere among inert gases is
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