🔍 Key Concepts

• Boiler feed water deaeration and why removing oxygen and non‑condensable gases is important for corrosion control • How condensate depression and hot well/DFT (deaerating feed tank) level affect temperature and pressure conditions needed for proper deaeration • The relationship between rapid makeup feed, tank level swings, and stable deaeration conditions

💭 Think About

• Ask yourself: which of these situations would interfere with maintaining the proper temperature and pressure in the deaerating feed tank that are needed to strip out dissolved gases? • Think about how sudden or excessive changes in condensate temperature, pressure, or tank level could let more oxygen stay in the feed water. • Consider whether each listed condition could reasonably upset deaeration on its own, not just be a symptom of another problem.

✅ Before You Answer

• For each choice, check whether it would reduce the effectiveness of gas removal (especially oxygen) in the deaerating feed tank. • Verify which conditions cause unstable temperature/pressure in the deaerating feed tank or hot well. • Before choosing, ask: is this problem limited to just one of these conditions, or could improper deaeration reasonably be linked to every condition listed?