Question 34Steam Plants - QMED

The correct answer is A) 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 takes suction on the main condenser and discharges the steam/air mixture to the inter condenser. This allows the second stage air ejector to then take suction on the inter condenser and further evacuate the system, creating a higher vacuum. The other options are incorrect because: B) The steam to the after condenser is not returned to the main condenser, C) The air is removed from the condenser, not the condensate, and D) The first stage does not take suction on the second stage - they operate in series to increase the overall vacuum.