Question 241Steam Plants - 1st Asst/Chief

The correct answer is D. The steam/air mixture from the main condenser is discharged by the first stage air ejector to the inter condenser. In a two-stage air ejector assembly, the first stage air ejector takes suction on the main condenser and discharges the steam/air mixture to the inter condenser. This condenses the steam, and the remaining air is then removed by the second stage air ejector, which discharges it to the atmosphere. The other options are incorrect because: A) the condensate is not returned to the main condenser, B) the air is removed by the second stage ejector, not as the condensate passes through the tubes, and C) the second stage ejector takes suction on the inter condenser, not the first stage.