You are preparing to undertake the re-piping...

Question 1 / 205eccefa2bacbc34ba4d47bd9

Question 1 of 205eccefa2bacbc34ba4d47bd9

You are preparing to undertake the re-piping of a water column for an auxiliary fire-tube boiler exceeding a 15 psig operating pressure and is piped similarly to the arrangement shown in the illustration. According to Coast Guard Regulations (46 CFR, Part 52), which of the following statements is true? See illustration MO-0093.

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🔍 Key Concepts

• 46 CFR Part 52 requirements for water columns and gauge glass connections on boilers over 15 psig • Restrictions on location of water column piping relative to uptakes, smokeboxes, and boiler casings • Requirements for materials, minimum pipe size, and valve position for water level indicating devices

💭 Think About

• Look at the illustration and ask yourself how the water column must always stay in open communication with the boiler drum, even if a valve fails or is accidentally shut • Think about which option, if done incorrectly, would most directly hide the true water level and create a serious explosion hazard • For each choice, ask: does this increase or decrease the reliability and safety of the water level indication in a fire-tube boiler over 15 psig?

✅ Before You Answer

• Verify in 46 CFR Part 52 whether water column connections may pass through hot gas paths such as uptakes, smokeboxes, or casings • Check the specified minimum pipe diameter for water column connections on auxiliary boilers over 15 psig • Confirm whether the regs require valves in the water column connections to be locked/sealed open and whether cast iron is permitted for pressure parts in this service

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Question 1 of 20

It is permissible to locate water column piping in the uptake, smoke box, or boiler casing.

The minimum size of the piping connecting the water column to the boiler is to be 1.5 inches (3.8 cm).

The various fittings used must be of cast iron construction.

The shut off valves on the boiler must be locked, or sealed open.

Question 1 / 205eccefa2bacbc34ba4d47bd9

Question 1 of 205eccefa2bacbc34ba4d47bd9

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5eccefa2bacbc34ba4d47bd9

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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