Which normally closed valve would have to be...

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Question 1 of 205eccefa0bacbc34ba4d46f42

Which normally closed valve would have to be at least partially open prior to actually lighting off a cold boiler as shown in the illustration? See illustration SG-0009.

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Question 1 of 20

5eccefa0bacbc34ba4d46f42

Which normally closed valve would have to be at least partially open prior to actually lighting off a cold boiler as shown in the illustration? See illustration SG-0009.

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🔍 Key Concepts

• Fuel oil system line-up for boiler light-off in cold conditions • Purpose of recirculation / by-pass lines around heaters, regulators, or meters • Which labeled valve is normally closed but must be opened to allow fuel to reach the burner for initial ignition

💭 Think About

• Trace the fuel oil flow path from the fuel settling tanks all the way to the boiler burners when starting from cold – where would flow be blocked if a valve stayed fully shut? • Think about what must be done before ignition: do you need circulation through heaters, strainers, or back to tank first, or direct flow to the boiler header? • Which of the labeled valves (C, D, F, J) is positioned so that, if left closed, the boiler front would still be isolated even though pumps and heaters are running?

✅ Before You Answer

• Confirm which valves on the diagram are marked as normally closed vs normally open. • Verify the direction of fuel flow arrows from the service/settling tank to the port or starboard boiler. • Check which labeled valve is the last isolation point in the fuel line to the boiler header, and would therefore need to be cracked open for light-off.

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Question 1 of 205eccefa0bacbc34ba4d46f42

Which normally closed valve would have to be at least partially open prior to actually lighting off a cold boiler as shown in the illustration? See illustration SG-0009.

Back

Question 1 of 20

5eccefa0bacbc34ba4d46f42

Which normally closed valve would have to be at least partially open prior to actually lighting off a cold boiler as shown in the illustration? See illustration SG-0009.

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?

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