🔍 Key Concepts

• Function of an internal desuperheater in a boiler and where it is located in the steam/water path • What happens when high‑pressure steam leaks into the boiler water circuit (or vice versa) in terms of water chemistry and treatment chemicals • How feedwater treatment chemicals behave when additional "un-treated" water or steam condensate mixes into the boiler drum

💭 Think About

• Think about whether a leak in an internal desuperheater would allow relatively pure condensate to enter the boiler water, or boiler water to escape and be replaced by makeup water. How would either of these change the concentration of chemicals? • If you keep adding the same amount of treatment chemicals as before, but the boiler water is being diluted or concentrated by the leak, what trend would you see when you test the water chemistry in that specific boiler over time? • Compare which answer choices talk about chemical amount present versus amount required. How would ongoing dilution or concentration affect test results and your adjustment of chemical feed rates?

✅ Before You Answer

• Be clear whether the leak would cause dilution or concentration of the boiler water in that drum. • Decide if the effect would mostly show up as a change in the measured concentration of chemicals already in the boiler or in the dosage/feed rate needed to stay within specs. • Verify that the option you choose directly reflects a chemistry/chemical balance symptom, not a mechanical or time‑related operation like priming unless you can clearly link it to the leak mechanism.