In a closed steam and water cycle, which of...

Question 1 / 270705eccefa1bacbc34ba4d472f2

Question 1 of 270705eccefa1bacbc34ba4d472f2

In a closed steam and water cycle, which of the conditions listed could prevent main condenser vacuum from reaching the desired level?

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Question 1 of 27070

In a closed steam and water cycle, which of the conditions listed could prevent main condenser vacuum from reaching the desired level?

🔍 Key Concepts

• Relationship between condenser vacuum and steam/condensate flow in a closed cycle • How air in-leakage or excess non‑condensables affect condenser vacuum • Which systems actually bypass or reduce heat load on the main condenser during maneuvering

💭 Think About

• For each option, ask: does this condition directly affect how well the condenser can remove heat and condense steam, or does it affect something else in the plant? • Which choices would introduce extra vapor/air into the condenser, and which would reduce the amount of steam reaching it? • During maneuvering, what does recirculating condensate do to the condenser’s load and vacuum compared with normal steaming?

✅ Before You Answer

• Identify which options would add steam or air to spaces that ultimately vent to the condenser or vacuum system • Identify which option would reduce the condensing load and therefore tend to improve, not worsen, vacuum • Check which choice is not directly related to condenser operation (more related to boiler efficiency or feedwater control)

Question 1 of 27070

In a closed steam and water cycle, which of the conditions listed could prevent main condenser vacuum from reaching the desired level?

Excess steam leaking from the turbine glands.

Abnormally low atmospheric drain tank level.

Main condensate recirculating valve open during maneuvering.

Dirty boiler economizer tubes.

Question 1 / 270705eccefa1bacbc34ba4d472f2

Question 1 of 270705eccefa1bacbc34ba4d472f2

In a closed steam and water cycle, which of the conditions listed could prevent main condenser vacuum from reaching the desired level?

Back

Question 1 of 27070

In a closed steam and water cycle, which of the conditions listed could prevent main condenser vacuum from reaching the desired level?