What unit, or factor creates most of the...

Question 1 / 270705eccef9cbacbc34ba4d45755

Question 1 of 270705eccef9cbacbc34ba4d45755

What unit, or factor creates most of the vacuum within a tight and adequately cooled main condenser once the main engine is in operation?

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Question 1 of 27070

What unit, or factor creates most of the vacuum within a tight and adequately cooled main condenser once the main engine is in operation?

🔍 Key Concepts

• Steam surface condenser operation in a main propulsion plant • Difference between removing air and non-condensable gases vs. condensing steam • How pressure drops when steam changes phase from vapor to liquid in a closed space

💭 Think About

• Think about what physically happens to the exhaust steam as it enters a properly cooled, tight condenser. What change of state occurs, and how does that affect pressure? • Which choice describes a device or action that mainly removes air and non‑condensables, and which describes the primary cause of the very low pressure (vacuum)? • If you suddenly remove most of the steam molecules from a space without changing its volume, what happens to the pressure? Which option best represents that process?

✅ Before You Answer

• Identify which option directly involves phase change of steam to water inside the condenser. • Distinguish between equipment that maintains vacuum (handles air leakage) and the process that creates most of the vacuum. • Verify in your engineering references how a surface condenser develops vacuum under normal steady operation, assuming it is tight and adequately cooled.

Question 1 of 27070

What unit, or factor creates most of the vacuum within a tight and adequately cooled main condenser once the main engine is in operation?

Main condensate pump

Main air ejector

Condensation of turbine exhaust steam

Counter flow of seawater over the surface of the tubes with the flow of exhaust steam in the tubes

Question 1 / 270705eccef9cbacbc34ba4d45755

Question 1 of 270705eccef9cbacbc34ba4d45755

What unit, or factor creates most of the vacuum within a tight and adequately cooled main condenser once the main engine is in operation?

Back

Question 1 of 27070

What unit, or factor creates most of the vacuum within a tight and adequately cooled main condenser once the main engine is in operation?