🔍 Key Concepts
• boiler water treatment and what each treatment chemical is designed to control (oxygen, pH, scale, solids)
• effects of dissolved oxygen on boiler metal (corrosion, pitting) and which control method targets oxygen specifically
• difference between removing oxygen and removing dissolved solids or foam/impurities
💭 Think About
• For each choice, ask yourself: does this action directly target oxygen in the water, or is it mainly for another purpose such as scale, foaming, or concentration control?
• Which factor (pH, dissolved solids, surface blows, scavenging chemicals) is most closely associated with preventing oxygen corrosion of boiler metal?
• If you could not test for oxygen at all, which single ongoing practice would still give you confidence that any oxygen getting into the system is being neutralized?
✅ Before You Answer
• Match each option to its primary function in boiler chemistry (oxygen control vs. scale/solids vs. foaming vs. alkalinity).
• Verify which method works continuously within the water rather than only at the surface or only when a manual action is taken.
• Confirm which parameter, when kept at its normal specified level, is specifically intended to remove or neutralize dissolved oxygen.