Question 241Steam Plants - 1st Asst/Chief70% to pass
Which statement is true concerning two-stage air ejector assemblies?
AI Explanation
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.
Related Questions
#239 Which of the devices listed is used to keep overheated condensate from flowing to the deaerating feed tank? #240 Air accumulated in the inter condenser of the air ejector assembly is discharged directly to the _______________.#242 Why does air entry into the main condenser reduce the efficiency of the steam cycle? #243 Serious tube leaks in the air ejector condenser assembly will cause _______________.#244 Which piping system is described in the illustration provided. Illustration SG-0010