Question 489General Subjects - Assistant Engineer

The correct answer is C) Thousandths of an inch. The standard unit of measure for vibration displacement, as used in the US Coast Guard Captain's License Examinations, is thousandths of an inch. This is the accepted industry standard for measuring vibration displacement, as it provides a clear and precise measurement of the magnitude of the vibration. The other options are incorrect because they do not represent the standard unit of measure. Option A) Ten thousandths of an inch is too small, while option B) and D) , peak to peak refer to the peak-to-peak value of the vibration, rather than the displacement itself.