In accordance with 46 CFR 61, for a passenger vessel, what is the interval in years between when hydrostatic tests must be performed on an oil-fired water-tube auxiliary boiler as witnessed by a marine inspector?
• 46 CFR 61 – Periodic tests and inspections of boilers • Specific requirements for oil-fired water-tube auxiliary boilers on passenger vessels • How inspection and test intervals in years are set in the regulations
• Look up the table or paragraph in 46 CFR 61 that lists hydrostatic test intervals for different types of boilers and note which row applies to an oil‑fired water‑tube auxiliary boiler on a passenger vessel. • Compare the required interval for this specific boiler type with the intervals for main boilers or other auxiliary boilers—are they the same or shorter/longer? • Ask yourself whether auxiliary boilers that are oil‑fired and water‑tube tend to have shorter or longer required test intervals based on safety and pressure considerations.
• Confirm you are reading the section in 46 CFR 61 that applies to passenger vessels, not cargo or other vessel types. • Make sure the boiler type matches exactly: oil‑fired, water‑tube, and auxiliary—not main, not fire‑tube. • Verify the interval is expressed in whole years in the regulation, then match that number to the closest choice provided.
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