While underway the engineer on watch reports...

While underway the engineer on watch reports...

Question 1 of 2707066636ef128f7522a1c521ada

While underway the engineer on watch reports the vacuum in the main condenser has been gradually decreasing. Which of the following could be a possible cause?

Question 1 of 27070

Q

While underway the engineer on watch reports the vacuum in the main condenser has been gradually decreasing. Which of the following could be a possible cause?

🔍 Key Concepts

• Relationship between condenser vacuum and heat removal by seawater through the condenser tubes • Effect of condensate hotwell level on condenser performance and steam condensation area • Whether changes in boiler or DC heater levels directly affect condenser vacuum

💭 Think About

• Think about which component is directly connected to the main condenser and can change how much steam-side surface area is available for condensation • Ask yourself: does a higher or lower level in each choice improve or reduce the ability of the condenser to maintain a low pressure (good vacuum)? • Consider which option would tend to flood part of the condenser or reduce effective heat-transfer area, and how that would impact vacuum

✅ Before You Answer

• Verify which system (boiler steam drum, DC heater, condensate hot well, seawater side) is physically part of or immediately downstream of the condenser • Check whether lower seawater temperature would normally improve or worsen condenser vacuum • Confirm which level condition would cause less steam to contact cooling surfaces and thus a gradual loss of vacuum