Assuming the inspection interval for a boiler as specified by 46 CFR 61 is 2.5 years, which statement is true?

Correct Answer: Option D — Two tests are required over a 5 year period, and no more than 3 years can elapse between any test or inspection and its immediate predecessor.

46 CFR 61.05-10 mandates that for boilers with a 2.5-year inspection interval, two inspections must occur within any five-year period. Furthermore, no more than three years may elapse between any two consecutive inspections, ensuring the boiler remains in safe operating condition throughout its service life.