Question 237Steam Plants - 1st Asst/Chief70% to pass
The second engineer reports to you as the Chief Engineer that there is an increased use of oxygen scavenging chemicals in a boiler. Which of the following could be a possible cause?
AI Explanation
The correct answer is D) Improperly functioning DC heater.
The increased use of oxygen scavenging chemicals in a boiler can be caused by an improperly functioning deaerating (DC) heater. The DC heater is responsible for removing dissolved oxygen from the boiler feedwater, and if it is not functioning correctly, it can lead to higher oxygen levels in the boiler, requiring increased use of oxygen scavenging chemicals to maintain the proper chemical balance.
The other options are incorrect because they do not directly relate to the increased need for oxygen scavenging chemicals. Boiler forced draft fan speed, water level, and steam demand are not factors that would typically lead to higher oxygen levels in the boiler system.
Related Questions
#235 On a steam vessel, if a centrifugal main feed pump were operating at shutoff head with the recirculating line closed, which of the following conditions could occur? #236 Which of the conditions listed may be indicated by the lifting of the DC heater relief valve? #238 Excessive water loss from the main feed system can be caused by _______________.#239 Which of the devices listed is used to keep overheated condensate from flowing to the deaerating feed tank? #240 Air accumulated in the inter condenser of the air ejector assembly is discharged directly to the _______________.