Question

The wet bulb depression is zero, when relative humidity is equal to

Answer 1

Explanation:

Wet bulb depression is the difference between the dry bulb and wet bulb temperature. Hence, when DBT = WBT implies that relative humidity =100%. Therefore when the wet bulb depression is zero the relative humidity is equal to zero.

Answer 2

Answer:

100%

Explanation:

Dry bulb temperature (DBT): It is the temperature of moist air measured by an ordinary thermometer

Wet bulb temperature (WBT): It is the temperature of air shown by a thermometer whose bulb is covered with wet cloth.

Wet Bulb Depression (WBD): It is the difference between dry bulb temperature and wet bulb temperature.

$\text { WBD }=\text { DBT }-W B T$

Now WBD =0

So DBT = WBT which happens when the air is fully saturated. So the relative humidity is $100 \%.$

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