The heating boiler on your harbor tug is of...

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Question 1 of 2066636eef28f7522a1c51fca8

The heating boiler on your harbor tug is of the type shown in the illustration. Which of the following arrangements describe a boiler of this type? Illustration MO-0195

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Question 1 of 20

66636eef28f7522a1c51fca8

The heating boiler on your harbor tug is of the type shown in the illustration. Which of the following arrangements describe a boiler of this type? Illustration MO-0195

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🔍 Key Concepts

• Fire-tube vs water-tube boiler – in which one does the water stay inside tubes and in which one do the hot gases flow through tubes? Look closely at the bank of small tubes around label D. • Natural vs forced circulation – does the water/steam move only because hot water rises and cold water sinks, or is there a pump driving it? Trace the arrows and piping from the feed water inlet at G. • Observe the separate steam drum / separator at F and how water returns to the main body of the boiler – that will tell you if circulation relies on gravity or a pump.

💭 Think About

• First decide: in this drawing, are the tubes that surround the furnace carrying water or hot gas? What does that tell you about whether it is a fire-tube or water-tube design? • Next, follow the arrows from the feed water inlet at G through the coils around D and into the steam separator at F. Ask yourself: would this flow be possible without a pump? • Think about small package boilers used on harbor tugs: are they usually quick-steaming coil/water-tube units or large shell fire-tube units? How does that match what you see here?

✅ Before You Answer

• Identify whether the tubes at D have combustion gases inside them or water inside them. This is critical for deciding fire-tube vs water-tube. • Check if there is a circulating pump in the water path (near G or in the external piping). Presence of a pump indicates forced circulation. • Confirm whether water can thermosiphon (rise/fall naturally) through the coils, or if the path is so tight and complex that it would realistically need a pump to move it. This will guide you toward natural vs forced circulation.

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Question 1 of 2066636eef28f7522a1c51fca8

The heating boiler on your harbor tug is of the type shown in the illustration. Which of the following arrangements describe a boiler of this type? Illustration MO-0195

Back

Question 1 of 20

66636eef28f7522a1c51fca8

The heating boiler on your harbor tug is of the type shown in the illustration. Which of the following arrangements describe a boiler of this type? Illustration MO-0195

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

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