Q1: Water entrained by circulating air in cooling towers is termed as

ANS:A - drift

Water entrained by circulating air in cooling towers is termed as drift. Drift is the term used to describe the small droplets of water that are carried out of a cooling tower with the exhaust air. These droplets are entrained in the air stream due to the high velocity of the air passing through the tower. Drift is undesirable because it represents water loss from the cooling tower system, which can lead to increased water consumption and potential environmental concerns. Blow down refers to the intentional discharge of water from a cooling tower to control the concentration of impurities in the recirculating water. Vapor load refers to the amount of water vapor present in the exhaust air stream of a cooling tower. Therefore, the correct term for water entrained by circulating air in cooling towers is drift.