1.
Which term is used to describe the amount of water vapour that exists in a gaseous mixture of air and water vapour
A
Absolute Humidity
B
Specific Humidity
C
Dynamic Humidity
D
Relative Humidity
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30 practice sets · Page 1 of 2
Which term is used to describe the amount of water vapour that exists in a gaseous mixture of air and water vapour
Absolute Humidity
Specific Humidity
Dynamic Humidity
Relative Humidity
Which of the following statements is / are correct about convection?
The act or process of conveying; transmission
Heat transfer in a gas or liquid by the circulation of currents from one region to another
The transfer of heat or other atmospheric properties by massive motion within the atmosphere, especially by such motion directed upward
All the above
Which of the following statement is true
Saturated air has a relative humidity of 100%
Air with a relative humidity in excess of 100% is said to be supersaturated
Relative humidity is measured with a hygrometer
All the above
Which of the following is the temperature at which water vapour saturates from an air mass into liquid or solid usually forming rain, snow, frost, or dew?
Dew point
Specific humidity
Frost point
Humidity during rain
Which of the following is defined as the ratio of th partial pressure of water vapour in a parcel of air to the saturated vapour pressure of water vapour at a prescribe temperature?
Absolute humidity
Specific humidity
Relative humidity
Humidity during rain
Which of the following instruments is used to measure humidity?
Kate Thermometer
Anemometer
Sling Psychrometer
Clinical Thermometer
Which of the following does not affect visibility on the ground?
Mist
Fog
haze
dew
What is relative humidity?
It is the ratio of specific humidity
It is the indicator of moisture content in the atmosphere.
It implies maximum vapour pressure in the atmosphere.
It is present everywhere
Water vapour has several very important functional roles on our planet. These are
It redistributes heat energy on the Earth through latent heat energy exchange.
The condensation of water vapour creates precipitation that falls to the Earths surface providing needed fresh water for plants and animals.
It helps warm the Earths atmosphere through the greenhouse effect.
All the above
The relative humidity of a region is low when
The wet and dry bulb thermometers read the same.
The difference between the readings of the wet and dry bulb thermometers is large
The temperatures are high
The temperatures are low
The quantity of water in a particular volume of air is called
Absolute humidity
Specific humidity
Relative humidity
Humidity during rair
The mass of water vapour divided by the mass of dry a in a volume of air at a given temperature is called
Absolute humidity
Specific humidity
Relative humidity
Humidity during rain
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