GENERAL KNOWLEDGE

GK

PHYSICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The temperature to which hund our must he cooled at constant pressure to become saturated is called
A
Dew point
B
Absolute humidity
C
Relative humidity
D
None of the above
Explanation: 

Detailed explanation-1: -The dew point temperature, commonly termed dew point, DP, is the temperature to which a parcel of moist air must be cooled at constant atmospheric pressure and constant water vapour content in order for saturation to occur.

Detailed explanation-2: -The dew point is the temperature to which air must be cooled to become saturated with water vapor, assuming constant air pressure and water content.

Detailed explanation-3: -The dew point is the temperature the air needs to be cooled to (at constant pressure) in order to achieve a relative humidity (RH) of 100%. At this point the air cannot hold more water in the gas form.

Detailed explanation-4: -Dew point pressure is defined as the pressure at which the first droplet of liquid appears at a specific temperature. The phase envelope for a typical gas condensate shows that the dew point pressure is a function of the temperature.

Detailed explanation-5: -The dew point and saturation point are not the same; there is a variation in the temperature and the density of the system at both points. At saturation point, the density of the water vapors in the air is very high and the temperature is equal to the atmospheric temperature.

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