🔍 Key Concepts

• Flow path of steam and drains into a deaerating feed tank • Difference between auxiliary exhaust steam and auxiliary steam in a marine plant • How gases are removed from feedwater by direct-contact heating

💭 Think About

• Follow the arrow marked "E" in the illustration: where does that line come from in a typical steam plant? • Which of the listed sources would normally enter the deaerating section as a continuous heating and stripping steam source, not just as intermittent drains? • Think about pressure levels: which choice is usually at the right pressure to supply the dome of the deaerator?

✅ Before You Answer

• Identify what component or header the nozzle at "E" is connected to in the drawing and in a standard steam cycle schematic. • Decide which option would provide a steady flow of steam for heating and oxygen removal, not just condensate return. • Confirm which of the four choices is commonly piped to the deaerator dome rather than to the storage section or condenser.