481.
The instrument used for measuring relative humidity in air is
A
Hygrograph or psychrometer
B
Hydrograph
C
Pantograph
D
Barograph
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The instrument used for measuring relative humidity in air is
Hygrograph or psychrometer
Hydrograph
Pantograph
Barograph
The actual moisture content of a sample of air as a percentage of that contained in the same volume of saturated air at the same temperature is called:
absolute humidity
relative humidity
specific humidity
vapour pressure
Specific humidity is
The indicator of density of water vapour
The maximum water content existing in the atmosphere.
It is the ratio of the mass of water vapour present to the total mass of air.
none of the above
Relative humidity refers to
Absolute amount of water vapour in the atmosphere
The amount of hygroscopic nuclei in the atmosphere
Saturated vapour pressure
Ration of actual amount of water vapour in the air to the amount it could hold at the temperature
Relative humidity of atmosphere is measured by
Hydrometer
Hygrometer
Potentiometer
Lactometer
Point at which gases turn in to liquid is called its
peak point
dew point
converting point
equilibrium point
If the dew point is below freezing, it is referred to as
Dew point
Specific humidity
Frost point
Humidity during rain
Humidity refers to
Brackishness of water
Latent heat
Water vapour in the atmosphere
None of these
Humidity is the result of
Evapouration
Transpiration
Presence of heat
Presence of moisture content in the air
Factor influencing humidity includes
temperature
pressure
water
osmosis
Dew point normally occurs when a mass of air has relative humidity of
50%
75%
80%
100%
Condensation is a process which occurs when
temperature falls below 0 degree Centigrate
absolute humidity becomes equal to relative humidity
temperature in the air parcel remains static
relative humidity becomes 100% and more
Because of which one of the following factors, clouds do not precipitate in deserts?
Low pressure
Low humidity
High wind velocity
High temperature
Amount of water vapour in air is regarded as
water vapour
Humidity
Mildness
Pressure
Amount of water vapor in air is regarded as
water vapor
humidity
mildness
pressure
All of the following statements are true except
Relative humidity of a mass of air falls if temperature of the air rises
Air is saturated when its relative humidity is 100%
When air subsides its relative humidity decreases
The relative humidity of a mass of air remains constant when the air crosses over a cold land surface from a warm water surface
A device used to measure humidity is called a
Psychrometer
Hygrometer
Both
None
A psychrometer is
A hair element instrument
A wet and dry bulb humidity instrument
An instrument that senses psychological disturbances
An instrument that reads directly in dew point
Ethiopia's Simien Mountains are home to which endemic species?
Ethiopian leopard
Nile crocodile
Gelada baboon
African lion
What is the largest ethnic group in Ethiopia?
Somali
Tigray
Amhara
Oromo