Question

For air with a relative humidity of 80%

• A. The dry bulb temperature is less than the wet bulb temperature
• B. The dew point temperature is less than wet bulb temperature
• C. The dew point and web bulb temperature are equal
• D. The dry bulb and dew point temperatures are equal

Answer 1

The correct option is B The dew point temperature is less than wet bulb temperature



For unsaturated air i.e.,

$\varphi <100\%$

Dry bulb temperature > Wet bulb temperature > Dew point temperature

$i.e.,T_{db}>T_{wb}>T_{dp}$


POINT TO REMEMBER

• When a volume of air at a given temperature holds the maximum amount of water vapour, the air is said to be saturated.
• Relative humidity is the water- vapour content of air relative to its content at saturation.