Which of the DC heater operations listed...

Question 1 / 270705eccef9cbacbc34ba4d457c3

Question 1 of 270705eccef9cbacbc34ba4d457c3

Which of the DC heater operations listed will result in excessive dissolved oxygen in boiler water?

Question 1 of 27070

Which of the DC heater operations listed will result in excessive dissolved oxygen in boiler water?

🔍 Key Concepts

• Function of a deaerating (DC) heater in removing dissolved oxygen from feedwater • Importance of proper venting to remove non-condensable gases like oxygen • Effects of water level and makeup feed rate on deaeration efficiency

💭 Think About

• For each option, ask: would this condition make it harder or easier for oxygen to be released and vented from the feedwater? • Think about what happens to oxygen and other gases if the vent is not working properly. • Consider whether more cold makeup water automatically means more oxygen in the boiler, or if the deaerating heater should handle it when operated correctly.

✅ Before You Answer

• Review how a deaerating heater actually removes dissolved gases (pressure, temperature, and venting). • Identify which listed condition(s) would directly interfere with oxygen leaving the water and escaping to atmosphere. • Check if any of the options describe a situation that might affect performance, but would still allow effective deaeration if the heater is operating correctly.

Question 1 of 27070

Which of the DC heater operations listed will result in excessive dissolved oxygen in boiler water?

Excessively high water level in the heater.

Adding excessive make up feed.

Operating the heater with a closed air vent.

All of the above.

Question 1 / 270705eccef9cbacbc34ba4d457c3

Question 1 of 270705eccef9cbacbc34ba4d457c3

Which of the DC heater operations listed will result in excessive dissolved oxygen in boiler water?

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Question 1 of 27070

Which of the DC heater operations listed will result in excessive dissolved oxygen in boiler water?