298. The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then September 6, 2025 by Admin A. Wet bulb temperature=dry bulb temperature B. Wet bulb temperature=dew point temperature C. Saturation temperature=dew point temperature D. All of the above ✅ The correct answer is option D.