USCG Exam PracticeBoiler and steam propulsion fundamentals
What condition does a sudden rise in chloride levels in boiler water most likely indicate?
- A. Excessive chemical treatment dosing causing alkalinity to increase
- B. Scale formation from calcium and magnesium hardness salts
- ✓ Seawater contamination, such as from a condenser tube leakCorrect
- D. Dissolved oxygen entering the system through the deaerating feed tank
Why C is correct
A sudden rise in chlorides is a warning sign of seawater contamination, for example from a condenser tube leak. Seawater must be identified and eliminated promptly to prevent scaling and corrosion of the boiler. Chloride rise is not associated with alkalinity dosing, hardness scale, or dissolved oxygen. (NAVEDTRA 14104 §4-5)
Cited:NAVEDTRA 14104 §4-5