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Engine: Retired questions · General Subjects

Question 1,081 of 674

Retired question: the Coast Guard no longer draws it on exams. Practice the current General Subjects module instead.

If an oil-in-water content monitor uses a lamp emitting light in the visible spectra in conjunction with a reference photo-cell and a sampling photocell, what is the operating principle upon which this oil-in-water content monitor works?

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