🔍 Key Concepts

• location and cause of heat blisters on boiler tubes • difference between fireside deposits and waterside deposits • effects of flame shape/direction and water level on the first row of generating tubes

💭 Think About

• Which of these conditions would concentrate intense heat on only the first row of tubes, rather than all tubes? • Would low water or waterside deposits affect just the first row, or more generally the whole length/height of the tubes? Why? • How would a mis‑adjusted burner flame pattern interact with the first row of tubes compared to later rows?

✅ Before You Answer

• Identify whether the damage described (heat blisters) is occurring on the fireside or waterside of the tubes. • Decide which options would most likely cause localized overheating specifically on the first row of tubes. • Verify which conditions (deposits vs. flame vs. water level) would tend to cause general overheating versus a localized hot spot on the leading row of tubes.