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The primary factors responsible for human comfort are


1. dry bulb temperature, relative humidity and air motion
2. dry bulb temperature, dew point temperature and air motion
3.  dry bulb temperature, relative humidity and latitude of the place
4. dry bulb temperature, relative humidity, air motion and elevation of the place

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Correct Answer - Option 1 : dry bulb temperature, relative humidity and air motion

Explanation:

Human Comfort:

The physical comfort of the human being which can be adjusted by adjusting the temperature, humidity, air velocity, and purity of the air is called human comfort.

Dry Bulb Temperature:

It is the normal temperature measured by an ordinary thermometer.

Dew Point Temperature:

The temperature of the air up to which the air should be cooled so that the water vapour present in the air starts condensing when cooled at constant pressure.

Relative humidity (RH):

Relative humidity refers to the moisture content (i.e. water vapour) of the atmosphere, as a percentage of the amount of moisture that can be retained by the atmosphere (moisture-holding capacity) at a given temperature and pressure without condensation.

Effective temperature:

  • It is the temperature of the saturated environment with negligible air velocity at which the person feels the same level of comfort as the normal person.
  • Effective temperature for winter is 20˚C and for summer it is 21.6˚C.

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