Q1: The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.

ANS:C - dew point

The dew point is the temperature at which air becomes saturated with water vapor, leading to the condensation of water vapor into liquid water. In simpler terms, it's the temperature at which the air can no longer hold all the moisture it contains, causing some of the moisture to condense out as dew, fog, or cloud droplets. When air cools, its capacity to hold moisture decreases. As the temperature decreases, there comes a point where the air reaches its saturation point, and any further cooling causes water vapor to condense into liquid water. This temperature at which condensation occurs is known as the dew point. The dew point is influenced by factors such as the amount of moisture present in the air and the air temperature. Higher moisture levels lead to a higher dew point, while lower moisture levels result in a lower dew point. Additionally, the dew point is often used as an indicator of humidity; higher dew points indicate higher humidity levels. The dew point is an essential parameter in various applications and industries, including weather forecasting, HVAC (heating, ventilation, and air conditioning) systems design, and outdoor activities planning. It helps determine the likelihood of fog formation, dew formation, or frost formation and provides valuable insights into atmospheric moisture conditions.