The dew point of moist air becomes ____________________ with decrease in its relative humidity ?
Correct answer: A. Less than the wet bulb temperature
- A. Less than the wet bulb temperature
- B. More than the wet bulb temperature
- C. More than the dry bulb temperature
- D. Equal to wet bulb temperature
Explanation
At a fixed dry-bulb temperature, lowering relative humidity lowers the water-vapour partial pressure and hence the dew-point temperature. For unsaturated air, the dew point is below the wet-bulb temperature, which is itself below the dry-bulb temperature.
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