How is the concentration of dissolved oxygen...

Question 1 / 205eccefa3bacbc34ba4d47c01

Question 1 of 205eccefa3bacbc34ba4d47c01

How is the concentration of dissolved oxygen in the feed water of an auxiliary boiler maintained at acceptable limits?

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Question 1 of 20

5eccefa3bacbc34ba4d47c01

How is the concentration of dissolved oxygen in the feed water of an auxiliary boiler maintained at acceptable limits?

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🔍 Key Concepts

• Dissolved oxygen and its effect on boiler corrosion • How feed water heating and deaeration remove gases from feed water • Difference between chemical treatment (like phosphates) and mechanical/thermal deaeration

💭 Think About

• Which method directly drives dissolved gases (like oxygen) out of the water: heating, adding chemicals, or just routing through equipment? • What is the main purpose of phosphates in boiler water treatment: controlling scale/alkalinity or removing oxygen? • Think about what happens to gases dissolved in water as temperature increases toward boiling.

✅ Before You Answer

• Identify which choice describes a process that physically liberates oxygen from the water, not just treats other properties. • Confirm the primary function of a DC (de-aerating) heater and whether an auxiliary boiler definitely uses that specific device. • Ask: in practical shipboard operation, what condition of the feed water (especially its temperature) best helps remove dissolved oxygen?

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Question 1 of 20

How is the concentration of dissolved oxygen in the feed water of an auxiliary boiler maintained at acceptable limits?

Feed water is cycled through a DC heater.

Feed water is treated with phosphates.

Oxygen is liberated in the three-stages of feed water preheating.

Oxygen is liberated by maintaining the highest practical feed water temperature.

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Question 1 / 205eccefa3bacbc34ba4d47c01

Question 1 of 205eccefa3bacbc34ba4d47c01

How is the concentration of dissolved oxygen in the feed water of an auxiliary boiler maintained at acceptable limits?

Back

Question 1 of 20

5eccefa3bacbc34ba4d47c01

How is the concentration of dissolved oxygen in the feed water of an auxiliary boiler maintained at acceptable limits?

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