The absolute pressure maintained in the...

Question 1 / 205eccef9cbacbc34ba4d4581a

Question 1 of 205eccef9cbacbc34ba4d4581a

The absolute pressure maintained in the shell of the salt water feed heater on most flash evaporators used on steam propelled vessels is __________.

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Question 1 of 20

5eccef9cbacbc34ba4d4581a

The absolute pressure maintained in the shell of the salt water feed heater on most flash evaporators used on steam propelled vessels is __________.

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🔍 Key Concepts

• Flash evaporator flow path – where does the salt water feed heater sit in relation to the flash chambers and vacuum stages? • Pressure levels in the plant – which components normally run under vacuum, and which run at positive (above-atmospheric) pressure? • Steam source for the feed heater – is the heater usually supplied by live steam or by low‑pressure extraction/auxiliary exhaust?

💭 Think About

• First, decide whether the salt water feed heater is a piece of equipment that normally operates under vacuum or at a positive pressure. Which of the answer choices match that? • Think about what supplies heat to the salt water feed heater on most steam‑driven flash evaporators: is it live steam from the reducing valve, or lower‑pressure extraction/auxiliary exhaust steam? How does that affect the shell pressure? • Compare the typical vacuum levels in the flash stages with the likely shell pressure of a heater being supplied with steam. Would a steam‑heated shell usually be at a pressure higher or lower than the vacuum in a flash chamber?

✅ Before You Answer

• Eliminate any options that would require the salt water feed heater shell to be at a deeper vacuum than the flash stages, if that conflicts with the usual design of flash plants. • Confirm whether the feed heater shell is normally connected to low‑pressure extraction/auxiliary exhaust steam or to live steam through a reducing valve in common marine installations. • Check which option describes a pressure relationship that allows heat to flow efficiently from the steam side to the seawater side without turning the heater itself into another flash (vacuum) chamber.

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Question 1 of 20

The absolute pressure maintained in the shell of the salt water feed heater on most flash evaporators used on steam propelled vessels is __________.

slightly less than the absolute pressure of the L.P. extraction

slightly more than the supplied live steam pressure at the reducing valve outlet

slightly higher than the second stage vacuum

slightly lower than the first stage vacuum

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Question 1 / 205eccef9cbacbc34ba4d4581a

Question 1 of 205eccef9cbacbc34ba4d4581a

The absolute pressure maintained in the shell of the salt water feed heater on most flash evaporators used on steam propelled vessels is __________.

Back

Question 1 of 20

5eccef9cbacbc34ba4d4581a

The absolute pressure maintained in the shell of the salt water feed heater on most flash evaporators used on steam propelled vessels is __________.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed