If the condensate level in the loop seal of the air ejector inter condenser is lost, __________.

Correct Answer: Option A — air will be drawn back into the main condenser

The loop seal maintains a hydraulic barrier between the vacuum of the main condenser and the atmospheric or higher pressure of the air ejector. If the seal is lost, the pressure differential forces air backward through the drain line into the main condenser, destroying the vacuum and degrading plant efficiency.